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Operator
Ladies and gentlemen, thank you for standing by, and welcome to the Cornerstone Building Brands Second Quarter 2020 Earnings Call.
(Operator Instructions)
Please be advised that today's conference is being recorded.
(Operator Instructions)
I would now like to hand the conference over to your speaker today, Tina Beskid, VP of Finance and IR. Thank you. Please go ahead.
Tina M. Beskid - VP of Finance & IR
Good morning, and thank you for your interest in Cornerstone Building Brands. Joining me today are Jim Metcalf, Chairman and Chief Executive Officer; and Jeff Lee, Executive Vice President and Chief Financial Officer.
Please be reminded that comments regarding the company's results and projections may include forward-looking statements that are subject to risks and uncertainties. These risks are described in detail in the company's SEC filings, earnings release and our investor presentation. The company's actual results may differ materially from the anticipated performance or results expressed or implied by these forward-looking statements.
In addition, management will refer to certain non-GAAP financial measures. You will find a reconciliation of these non-GAAP financial measures and other related information in the earnings release and investor presentation located in the Investors section of our website.
Please note, we will be referencing our investor presentation throughout today's call. Today's call is copyrighted by Cornerstone Building Brands. We prohibit any use, recording or transmission of any portion of the call without our expressed advanced written consent. Throughout this presentation, management may also refer to pro forma financial results. Such pro forma results give effect to the completed acquisitions as if such acquisitions were consummated prior to the periods presented.
On August 9, 2020, the company detected a ransomware attack impacting certain operational and information technology systems and immediately launched an investigation, notified law enforcement and engaged the services of specialized legal counsel and other Internet response professionals. As of today, we have recovered many of our critical operational data and business systems. Although the company is in the early stages of assessing the incident, based on the information currently known, we do not expect the incident to have a material impact on our business, operations or financial condition. The company carries insurance, including cyber insurance, which we believe to be commensurate with our size and nature of our operations.
With that, I would like to turn the call over to Jim.
James Shane Metcalf - Chairman of the Board & CEO
Thank you, Tina. Good morning, and appreciate you joining us today. The COVID-19 pandemic emerged with unprecedented challenges, yet the Cornerstone Building Brands team rose to the occasion and delivered solid operational and financial results. Rooted in our core values and cultivated by our safe work environment, our teams served our customers, kept each other safe, drove structural improvements and strengthened the financial health of the company. Challenged with a significant decline in market demand, we took advantage of our national footprint, product breadth and deep customer relationships to provide uninterrupted service and high-quality products to our valued customers.
Leveraging our continuous improvement culture, our team was able to deliver $50 million in cost savings from structural improvements and effective near-term expense management. Overall, we have improved our profitability, even in these turbulent times. We delivered adjusted earnings of $0.34 per diluted share and approximately 15% adjusted EBITDA margins, which is a 130 basis points better than the same pro forma period last year. And for the fifth consecutive quarter, we have delivered margin expansion in each of our business segments.
As the leading manufacturer of exterior building products in North America, we are uniquely positioned to maximize our business model and manage through this current environment. As an essential business, all of our manufacturing facilities, distribution centers and installation services were operating throughout the quarter.
Now turn to Slide 4. We continue to focus our operating model on 3 key areas: the health and safety of our employees, servicing our customers, maintain a strong financial position with a keen eye on liquidity and capital discipline. The health and safety of our employees remains our #1 priority. We've taken extraordinary measures and invested in practices that helped kept our employees safe at work. And many of these policies and practices have been deemed best-in-class by local assessors and actually have been used by other companies.
Now turning to Slide 5. We are committed in the Cornerstone value proposition. We are strategically positioned to serve the residential, commercial and repair and remodel markets knowing the important role that our building solutions play in the growth and prosperity of the customers we serve. We have a broad portfolio of complementary products that we will continue to expand through innovation, product line extensions and strategic acquisitions.
In fact, during the second quarter, we successfully integrated the acquisition of Kleary Masonry Inc. Kleary is a leading installer of manufacturing stone veneer in Northern California and is an excellent strategic fit for our company. Adding to the 30 installation hubs located strategically throughout the country and strengthening our position in the cladding market. In fact, we're the only national turnkey provider of stone solutions. This service offering provides our customers with expert installation from our trained craftsman, a dedicated project manager on-site and a vertically integrated value proposition. We're also excited about the opportunities the addition of Kleary brings across our builder and contractor networks, in particular, to cross-sell our stone cladding and installed services into our commercial buildings business.
We are focused on operational excellence across our enterprise. As we began to feel the effects of COVID-19 on our business in late March, we responded with speed and intensity to combat the impact of this crisis and capture maximum benefits during the recovery. We accelerated cost and productivity initiatives that structurally transform the company's cost structure. A few examples of our cost actions include plant rationalizations across our footprint, rightsizing the organization and automating our manufacturing processes. In our Toledo, Ohio, Windows facility, we commissioned a fully automated glass line, replacing 20-year-old equipment, doubling capacity and improving productivity by 50%. With the continued tightness in the labor market, investments in manufacturing automation will transform the way work gets done at Cornerstone Building Brands.
We remain committed to delivering between $80 million and $100 million of year-over-year structural cost benefits in 2020. Reducing leverage is another important priority for the company, and we continue to make progress towards that goal. During the second quarter, we reduced net debt by $44 million and improved liquidity by $35 million. We also generated $49 million of free cash flow during the second quarter and expect to continue to generate strong free cash flow the rest of the year. We are in a much better position from a both earnings and capital structure than we were 1 year ago. Our improved cost structure and liquidity place us in a good position to take advantage of the improving market sentiment. This includes making balanced investments in key growth categories to ensure we are deploying our capital to areas that we can drive the greatest long-term returns for our shareholders.
Now turning to Slide 6. We've begun to see momentum within the residential and repair and remodel markets. New residential construction declined sharply in April as COVID-19 triggered stay-at-home orders and rising unemployment claims. April housing starts were more than 25% lower than the previous year. Over the last few months, as stay-at-home orders have been lifted, U.S. housing activity has rebounded. Housing starts improved sequentially and June starts were only 4% lower than a year ago. Repair and remodel activity has also shown resiliency, driven by robust demand from home remodeling.
Our Siding and Windows segments have benefited from this positive rebound. For the month of June, Siding net sales were 1% higher than pro forma year prior and the Windows segment was only down 2.5% versus the prior year. These results were a significant improvement from the start of quarter as April sales were down 21% and 28%.
Additionally, the delayed completion of new home construction from shelter-in-place restrictions resulted in increasing backlog. Since April, booking dollars and backlog have increased sequentially every month. At the end of the second quarter, backlog within Siding and Windows segments were 55% and 40% higher than last year, representing record levels for both segments. And while we're encouraged by these improvements, the marketplace still remains uncertain. We are cautiously optimistic about a continued improvement in U.S. housing. Interest rates are at historic lows and demand for housing exceeds available supply. But however, rising COVID-19 infection rates and the potential pullback of reopening plans weigh on consumer confidence levels and a potential for a further rise in unemployment.
As we look at our Commercial business on Slide 7, the impact from COVID-19 on the nonresidential market has been mixed. Approximately 38% of pro forma net sales are from our commercial products with differing degrees of exposure. Our highly differentiated product portfolios such as engineered buildings, components, insulated metal panels, wall systems, those enable us to serve several low-rise commercial markets. Unfortunately, uncertainties brought on by the pandemic caused our customers across all commercial end-use markets to defer capital spending, negatively impacting demand for our products during the second quarter. Commercial construction activity is slowly improving and market demand remains varied. However, some positive spots do exist. One end-use market, we have a significant participation in, is warehouses. Approximately 25% of the Commercial segment's net sales are for serving this end-use market, which is generally positive from the strength of e-commerce.
Our average daily bookings are slowly improving. And our backlog is low single digits, better than last year. Based on our current visibility, we do expect third quarter demand to improve sequentially for the Commercial business.
Turning to Slide 8. We continue to believe that Cornerstone Building Brands is a compelling investment for the long term. We are relentlessly committed to our customers in creating great building solutions. Our broad portfolio of products and vast manufacturing network provides us with a unique strategic advantage in a diversified set of end-use markets with new residential, repair and remodel, commercial and manufactured housing. We have great opportunities to expand and strengthen our existing customer relationships by providing integrated solutions tailored to each one of these channels and optimizing our capital deployment to create long-term shareholder value.
Our disciplined culture is committed to delivering sales growth and margin improvement by focusing on operational excellence every single day. We know that these challenging times like these will require swift and decisive actions to preserve our financial strength and ensure sound liquidity. Our leadership team has executed with speed to improve cash generation, lower cost and accelerate operational improvements. These actions are rooted in our strategy to make Cornerstone Building Brands a lean, more agile, customer-focused company that positions us to continue to deliver profitable growth.
Now I'd like to turn the call over to Jeff, who's going to walk through some of the financial results for the quarter. Jeff?
Jeffrey S. Lee - Executive VP, CFO, Principal Accounting Officer & Treasurer
Thanks, Jim, and good morning, everyone. The Cornerstone Building Brands' business model is built on a strong culture of continuous improvement and proven execution of our strategic priorities. During the quarter, we took decisive action to align our cost structure with declining volumes and safeguarded liquidity. I'm pleased to say that these actions helped Cornerstone prove its resilience and deliver solid financial results despite the challenging environment caused by COVID-19 pandemic.
Starting on Slide 10. Net sales for the second quarter were down 17% from pro forma prior year, primarily as a result of lower demand across all segments due to the COVID-19 pandemic. As Jim mentioned, for most of our businesses, April was the low point. As stay-at-home orders were lifted and safety measures implemented on job sites, demand began to recover, resulting in sequential improvements in May and June.
We delivered an adjusted EBITDA margin of 14.7%, the highest margin in our company's history with an increase of 130 basis point improvement versus prior year. This improvement reflects our success in effectively managing decremental volumes through near-term expenses while executing on structural cost savings initiatives. We were able to favorably impact manufacturing operating costs and lower SG&A. Our team's focus on executing our strategy of operational excellence has resulted in year-over-year adjusted EBITDA margin expansion for the fifth consecutive quarter.
Overall, we have strengthened Cornerstone's low-cost operating model and enhanced our financial flexibility, which are critical for our company's ability to grow earnings over the long term.
Although we had adjusted EBITDA margin expansion of 130 basis points, we did see reduced demand for higher-margin products in the Commercial segment, driving negative mix of approximately $14 million that is included in the price and mix net of inflation. We continue to see net price of inflation across all our business segments.
Now let's look at our business segment results. You will note that the presentation of our segment performance now includes adjusted EBITDA measures, which we believe will be useful to investors as these measures are representative of the company's performance and provide improved comparability of results. As mentioned earlier, the effects of the COVID-19 pandemic resulted in lower demand across all segments. However, each of our segments responded with adjusted EBITDA margin expansion for the fifth consecutive quarter.
Turning to Slide 11. The Windows segment generated 14.2% adjusted EBITDA margin on $428 million of net sales, which is a 140 basis point improvement on a 15.8% decline in revenue versus prior year. Positive net price and mix, combined with cost discipline, were the main drivers of margin improvement. The pace of recovery within the U.S. has been significant. In April, the unfavorable net sales variance to prior year was over 28%, while in June, the variance was less than 1%. Strong retail volume from state and local reopenings, combined with repair and remodel volume for do-it-yourself projects, drove the recovery during the quarter. Volumes continue to be strong moving into the third quarter, requiring our plans to quickly ramp up operations. We have implemented some wage adjustments to help facilitate those efforts.
Turning to Slide 12. The Siding segment generated 22.2% adjusted EBITDA margin on $285 million of net sales, which is 170 basis point improvement on 10.4% decline in revenue versus prior year. Cost discipline, combined with net price and mix over inflation, were the main drivers of this improvement. Similar to Windows, the pace of recovery within Siding was strong. Our Siding business has a larger participation in the repair and remodel markets in both the U.S. and Canada.
Within our U.S. Siding business, April net sales were down 23.1% to prior year, while in June, net sales were favorable 5.7%. We experienced the same dynamic within our Canadian Siding business. April net sales were down 20% and June net sales were up 4.9%. We continue to see strong demand in our Siding business and are cautiously optimistic about the market recovery and positive momentum in the residential end markets.
Moving on to the Commercial segment on Slide 13. Net sales in the second quarter of 2020 were $371 million or 22.7% lower than the same period last year. While demand dropped as a direct result of the slowdown in construction activity, steel prices also dropped, pressuring average sell price per ton. We were able to effectively manage this spread dynamic, which resulted in an immaterial impact to adjusted EBITDA.
Despite the $14 million mix I mentioned previously, we generated 15.2% adjusted EBITDA margin for the quarter, which was 10 basis point improvement over the prior year, the fifth consecutive quarter of margin enhancement for this segment as a result of strong execution around effective cost management. The structural improvements achieved within the Commercial segment offset the negative mix impact realized from the shift towards smaller, less complex projects. Overall, the low-rise nonresidential markets are stable and have not experienced the rapid pace of recovery that exists within the residential end markets. However, we continue to see improved bookings over the second quarter. Since the business environment and market conditions under COVID-19 are still fluid and evolving, we will remain flexible and adjust our near-term responses as necessary to preserve our solid financial performance.
Turning to Slide 14. I would like to make some comments about our balance sheet and liquidity. We generated free cash flow of $49 million in the second quarter. A $60 million improvement over prior year, primarily from effective working capital management and lower cash taxes. Working capital reductions generally provide a countercyclical benefit in downturns like the current one, enhancing our cash flow and liquidity. We have focused on both aligning working capital with volumes as well as structurally improving it for the future as evidenced by the 1.5% point improvement in primary working capital as a percentage of net sales over prior year.
We expect to continue to generate strong cash flow over the rest of 2020. We are anticipating a cash benefit of $50 million from favorable working capital improvements. In addition, we are reiterating our expectation to reduce structural cost by $80 million to $100 million in 2020. We remain committed to our strategic priorities of improving our customer experience, operational excellence and strong financial performance.
While managing costs and generating additional cash are important areas of focus, we have not lost sight of the need to continue to invest in the business for the long term. We remain committed to innovation and investing in new product offerings and process automation that will generate profitable growth in the future. We anticipate the full year 2020 capital spend will be approximately $85 million.
In the area of tax, we are taking advantage of COVID-related government stimulus programs to defer certain payroll and income taxes to later in 2020, or in some cases, into 2021. Additionally, provisions within the CARES Act will allow the company to deduct higher interest expense for income tax purposes that would have been previously disallowed. We expect these actions, coupled with the impacts of improved demand, to have a net cash tax benefit of approximately $10 million in 2020. We ended the quarter with approximately $483 million of unrestricted cash on hand and $146 million of excess availability on our asset-based revolving credit facility. We believe our liquidity is sufficient to weather the economic uncertainty related to the ongoing impact of the COVID-19 pandemic, while providing the company the flexibility needed to continue to execute our growth strategy.
Turning to the third quarter outlook on Slide 15. We recognize that there's still uncertainty around the ongoing impact of the pandemic. However, we believe we have enough visibility, confidence in our operations and cost structure to cautiously provide guidance under the following assumptions that momentum continues within the residential markets and nonresidential markets remain stable. We expect the consolidated net sales for the third quarter will be between $1.160 billion and $1.240 billion and adjusted EBITDA to be between $170 million and $195 million. We plan to stay disciplined on price, drive profitable growth and capture additional cost savings, positioning us to generate year-over-year margin expansion, again, next quarter.
Turning to Slide 16. Our priority is to build an even stronger company, protect the health and safety of our teammates and serve our customers, position us to deliver strong operational and financial results. Our team successfully executed against these priorities in the second quarter despite the challenges and uncertainty created by the COVID-19 pandemic. We are proud of the continuous improvement culture we have created and believe the proactive measures we are taking will strengthen the long-term fundamentals of our company.
And now I'd like to turn the call back over to Jim for some closing remarks.
James Shane Metcalf - Chairman of the Board & CEO
Thank you, Jeff. The safety of our employees is our #1 operating principle and transparent communication has been a top priority. I'd like to acknowledge and thank our employees working in all of our manufacturing plants and throughout our entire organization for their unwavering dedication and commitment to serving our customers and adhering to our safety guidelines.
As we continue to successfully navigate the challenges brought on by the COVID-19 pandemic, our actions remain rooted in strategy. We are committed to innovation and investing in new product offerings that will generate profitable growth in the future, which is a key element of our strategy.
While managing costs and generating additional cash are important areas of focus, we have not lost sight of the need to continue to invest in our business for the long term. We fully intend to emerge from this pandemic an even stronger company, better positioned for success and long-term profitable growth.
This ends our prepared comments, and now we'd be happy to take your questions.
Operator
(Operator Instructions)
Your first question comes from Lee Jagoda with CJS Securities.
Lee M. Jagoda - Director
So I guess, we started last quarter with you giving us the sort of April down mid-20s. And then earlier on the call, you gave us some clarity on how June shaped up on the residential side. Can you talk about the commercial side in June? And then also just by segment trends you're seeing in July?
James Shane Metcalf - Chairman of the Board & CEO
Yes. Let me give you a couple of global comments, and then I'll turn it over to Jeff. July, the trends continued to be strong. Strong backlog in July, both on the residential side, and we're starting to see stabilization on the Commercial side. If you look at the Commercial bookings and backlog, as I said, the backlog is low single-digit for Commercial. And we're seeing sequential improvement in our bookings from the second quarter. So we feel, Lee, that the Commercial business has stabilized. The overall market has stabilized, we feel. Steel costs have also stabilized, even though at low levels. And we -- on the commercial side, we're still cautiously optimistic about the third quarter, and margin expansion continues to be a focus that we have in the business.
Jeffrey S. Lee - Executive VP, CFO, Principal Accounting Officer & Treasurer
And Lee, as you think about the month of June itself, you can see from the change in July, it has significantly improved. The month of June was down about 25% for the Commercial segment.
Lee M. Jagoda - Director
Got it. Okay. And then just following up on the Commercial side. You've done a really good job holding on to price, excluding the mix issues that you've seen. In the face of both lower raw materials and soft demand, how should we think about this, I guess, pricing over the next couple of quarters, just given the demand environment? And would you continue to expect EBITDA margin expansion in Commercial in Q3?
James Shane Metcalf - Chairman of the Board & CEO
That is our focus is margin expansion. Price has been under -- really under pressure most of this year. And we have -- as you mentioned, we have a pretty good track record of balancing price and volume with the fluctuation in costs that we've seen really over the last 5 quarters. So pricing, we feel has stabilized, even though at a low level. And we're very focused, not only on balancing price and volume to expand our margins, but really focus on our plant efficiencies and also cost-outs in the Commercial business. We've delayered the organization. We figured we've lowered the overall breakeven of the Commercial business. And we're really focused on margin expansion into this quarter.
Lee M. Jagoda - Director
Okay. One last one for me, and I'll hop back in. Just on the residential side as it relates to pricing. In Q1, I think you had mentioned you put in around a 5% price increase, and we were waiting to see what would ultimately stick just given the environment we were entering into. Any update on what actually has stuck and what you expect for the rest of the year?
James Shane Metcalf - Chairman of the Board & CEO
Yes, we put in price increases in our residential business late first quarter, that really took effect in the -- late in the first quarter and really impacted in the second quarter. So we've been pleased with our price performance on the residential side. Again, we think that's a core competency that we have as Cornerstone. And with the strong volumes that we're seeing, pricing is pretty solid at this point.
Operator
Your next question comes from Julio Romero from Sidoti & Co.
Julio Alberto Romero - Equity Analyst
I guess my first question is just on the backlog. I know you mentioned backlog for Siding and Windows were up 55% and 40% year-over-year. Can you just talk to the mix in that backlog? Maybe from a good, better, best perspective for both Siding and Windows?
James Shane Metcalf - Chairman of the Board & CEO
Yes. If you look at our overall residential business, the mix is about 50-50, new res versus repair and remodel, where the Siding business has a heavier percentage on the repair and remodel market.
Julio Alberto Romero - Equity Analyst
Okay. Got it. And I guess you mentioned on the Commercial side, 25% of your sales are coming from the warehouse end market, which continues to be strong. Could you maybe give us a sense of your end market breakout at the moment? I mean warehouses maybe compared to office, retail manufacturing?
James Shane Metcalf - Chairman of the Board & CEO
Yes, that's a great question. One of the advantages, we talk a lot about diversification of the overall Cornerstone portfolio of repair and remodel, new Commercial and new residential. We haven't talked a lot about the diversification we have in our Commercial business. We actually participate in each one of the end-use markets that are 5 stories or below. Right now, as we said, warehouse is strong with the data centers in e-commerce. That's right now making up about 25% of our business. But we stay really close to our customers and whatever end-use segment shows growth or potential, our customers really gravitate to that. Right now, it's the warehouse data centers, where there's a mix -- you aren't seeing a big -- a strong demand on office and retail. So the advantage we have in our Commercial business, we don't have one of these end-use segments that we're completely focused on or it's really our base business. So we're really spread out on anything as 5 stories or under. And our customers stay close to what are the growth opportunities.
Along with that, there's a trend that people have started talking about with COVID-19 going out to the suburbs and with -- even now the urban centers, and we think that also a long-term plays well with our diversification of our Commercial business, where smaller Commercial business, 5 stories are below will be -- could be built around suburban areas.
Julio Alberto Romero - Equity Analyst
Understood. So maybe sticking more to 5 stories and below, unless you're maybe more nimble and able to adjust your business, not necessarily tied to one specific end market?
James Shane Metcalf - Chairman of the Board & CEO
Absolutely. That's very well said, and that's why we think that's a great advantage for us.
Julio Alberto Romero - Equity Analyst
Okay. And I guess just last one for me. I'll hop back to Windows. Have dealers rebounded there? And can you maybe speak to the strength you're seeing in that channel in July?
James Shane Metcalf - Chairman of the Board & CEO
Yes. Our customers are quite busy. There -- we really watch the inventory levels of our customers. As you know, in COVID-19, customers kept inventories very tight. With the rebound in Commercial, the -- it hasn't been an inventory rebuild, it's been flowing through. We also follow the point of sales for a lot of our retail customers, which has been quite strong and continues to be very robust as we speak. So our dealers and customers are flowing through the product. The only areas that were a problem a few months ago is when job sites were being stopped, those have opened up. And right now, it's very positive.
Operator
Your next question comes from Richard Kus of Jefferies.
Richard E. Kus - Analyst
So just to talk a little bit more about the Commercial business and the backlog there. One of the things you mentioned in your comments is that you've kind of moved from a negative mix standpoint to some of the lower complexity-type business. As you look at your backlog that you guys have, is that something that persists in the backlog? And then what does it take to get some of that better, higher-margin business back?
James Shane Metcalf - Chairman of the Board & CEO
Well, the higher-margin business, really, if you look at that, it's more on the IMP business, our insulated metal panels business, which has gone from higher end architectural business, which has slowed, and those jobs have been paused, even at the architectural level, to jobs like cold storage, which has shown growth within the IMP segment. And that is a price mix. The price and product on the high end, architectural is much higher than the cold storage. Also, we're seeing, from a building standpoint, the lower complexity buildings, which are basic warehouses, lower complexity buildings, which come at a lower price point in the segment. So it's really the overall demand. We need private capital spending to start-up again, which will -- which should help. And really, there's still a lot of unknowns there as well.
Richard E. Kus - Analyst
Okay. Got you. And then just in terms of the backlog itself, how far does that extend out? And then is it really hard to have visibility later this year because, obviously, some of the indicators on the Commercial side weren't great for a long period of time there during this last quarter. So I think people are concerned that maybe late this year, early next year, you hit a bit of a soft spot. How do you guys view that?
James Shane Metcalf - Chairman of the Board & CEO
We view -- depending on the complexity of the building, with lower complexity buildings, you're looking at 90 to 120 days.
Richard E. Kus - Analyst
Okay. Got you. And then last question for me on the cost takeout side of things. You guys did a great job in the quarter. It looks to me from the bridge that you got about $45 million cost takeout there. How much of that benefit that you ended up getting in EBITDA represents permanent cost takeout versus some of the more temporary items?
Jeffrey S. Lee - Executive VP, CFO, Principal Accounting Officer & Treasurer
Yes, that's a great question. We've been focused on both. Obviously, with the uncertainty inside of Q2 and even the forecast going forward as there's just a lot of uncertainty in the marketplace, we've been making sure that we're managing both the structural side, permanent reductions and also those near-term expenses for liquidity purposes, in particular. And so as you look at Q2, about 50-50 of that was kind of split between structural and near-term expenses. And as we look forward into Q3 and Q4, as volume comes back, as we talked about last time, we would expect some of those near-term expenses to come back as well, which would be a very positive thing, right? And even, as Jim mentioned, inside of some of the conversations around labor and some of the issues that we're having with labor right now, we have gone out and increased some of our wage expenses for our employees to make sure that we keep the retention there.
So some of those near-term expenses are coming back into the company as we predicted, and that's a good thing as volumes are coming back. But structurally, we've taken out those. Year-to-date on structured cost out, we've taken out $50 million so far inside the company. And that's coming through a lot of different initiatives that are in place with automation. It's coming through some of the plant closures and the footprint rationalization that we've gone through. And there's still more to come, right? So there's some other projects that we're working on right now.
Operator
(Operator Instructions) Your next question comes from Matthew Bouley with Barclays.
Matthew Adrien Bouley - VP
I wanted to ask about that backlog acceleration in Windows and Siding. And I hear you mentioning potentially some labor issues there. I guess are there production issues overall that are sort of preventing you from fulfilling orders there? And maybe if you could reconcile that large backlog acceleration, the up 40% and 55%, kind of with the revenue guidance for a year-on-year decline in Q3?
James Shane Metcalf - Chairman of the Board & CEO
Yes. Thank you for the question. Really, it gets down to very -- to knock that backlog down, it's very simple. It's bringing in the labor. There -- as Jeff just mentioned, we have labor shortages. We've put in initiatives. We talked about the wages. We've put in internal marketing, retention bonuses, recruiting. We're very aggressive about bringing the labor in. Our biggest area is our Windows business, having the appropriate labor. So knocking those big backlogs down really equates to bringing back the labor with this quick turnaround. That is why also we've talked a lot about automation. Automation is critical because this labor shortage is not going to end in the very near future.
So our strategy is to invest a large percentage of our CapEx budget to automate, not only our Windows plant, but our Siding plant and Commercial plant because just overall manufacturing, bringing back the hourly employees at this time has been very difficult. The CARES Act and some of the government's stimulus package was -- impacted that. Just the COVID-19 overall issue has impacted it, but we are extremely aggressive of getting as much labor back as we can and have put in the appropriate measures to do that. But really, it really -- that knocking that backlog, the headline is, we get the labor, we can ship the backlog.
Jeffrey S. Lee - Executive VP, CFO, Principal Accounting Officer & Treasurer
And Matt, just to follow-up a little bit on that as well. As we kind of came into the months of April -- and March and April, we were putting the brakes on, right? We were really slowing down things in anticipation of what might come with the sudden shutdown type of scenario. And then as we get into the May-June time frame, in particular, in our residential businesses, Window and Siding, it just completely reversed, right? And so we went from putting on the brakes to stepping on the gas and trying to get as much production as we can.
It's not a capacity issue from manufacturing when it comes to equipment. It is that labor component that Jim talked about. And that's all effort right now put in place to make sure that we have that. And we've seen some improvement there. Some of the actions that we've taken with the wage increases and modifications of hiring practices, et cetera, have allowed us to increase that and to get more wage -- or more valued employees back into the organization.
Matthew Adrien Bouley - VP
Got it. That's very helpful color. And then secondly, just -- I guess, it's kind of a segue from that, but also on the Q3 guide. So you're guiding the margin expansion, EBITDA margin expansion, but with gross margins perhaps down at the midpoint, and correct me if I'm wrong. And I hear you that there's going to need to be some costs coming back into the system. But clearly, that margin guide is suggesting that there's a fair bit of SG&A control into the quarter. So maybe if you could just put a little more color around SG&A dollar expectations. What costs are coming back and kind of what level of confidence is there that the SG&A side is really going to drive this EBITDA margin uptick?
Jeffrey S. Lee - Executive VP, CFO, Principal Accounting Officer & Treasurer
Yes, Matt, so let me take that question. A couple of things, right? When you look at it on a year-over-year basis, we are seeing a slight tick down inside the gross profit margins. But on a sequential basis, they continue to move up. And as we thought about that, on the low end of our EBITDA margin range, it's still a 50-basis-point improvement versus prior year. And on the high end, it's 150-basis-point improvement. It shows that volume benefit that we get as a company as volumes come back and the operating leverage that we have around that.
We are being very cautious on SG&A expense, right? We want to make sure -- we don't know, there's still a lot of uncertainty, and we want to make sure that we're acting appropriately until we can fully see our way through this pandemic. And so because of that, we are keeping a lot of the controls very tight around our SG&A spending when it comes to new hires or wage inflation, those type of things. Travel, obviously, is down. Many of the things that we can really control, we want to make sure that we keep that under control.
So we feel good about the guidance that we put out there, which is margin expansion and we have a little bit of pressure inside of our commercial markets with the steel spread, but we are continuing to see margin enhancement even with that inside of our Commercial business with some of the SG&A and other things that we're doing to make sure we maximize the profitability for the company.
Operator
Your next question comes from Lee Jagoda from CJS Securities.
Lee M. Jagoda - Director
Just two quick follow-ups. One with regard to backlog. I appreciate the percent increase dynamic and, I guess, color there. Can you just give us the dollar backlog in Window, Siding and Commercial?
Jeffrey S. Lee - Executive VP, CFO, Principal Accounting Officer & Treasurer
Just 1 minute here. We're grabbing the data.
Lee M. Jagoda - Director
And I guess, while you're looking for that, probably an easier question. The tax guidance you gave of a $10 million benefit is a little bit lower than you gave previously. Is that just because of the increased financial performance?
Jeffrey S. Lee - Executive VP, CFO, Principal Accounting Officer & Treasurer
That's correct, Lee. It's a combination of a couple of things actually. We've got higher expectations, obviously, on earnings from the expectation that we had last quarter as we look at the second half of 2020. And then it's got some benefits in there as well from the CARES Act, and in particular, the 163(j), which is the interest rate limitation, move from 50% to 30%, and so it allows us to take a little bit more advantage of that. So the combination of those 2 things, one, offsetting, but obviously, the increase in the forecast being most of that drop.
Lee M. Jagoda - Director
And is it too early to tell what 2021 looks like from a tax standpoint?
Jeffrey S. Lee - Executive VP, CFO, Principal Accounting Officer & Treasurer
It's too early.
Lee M. Jagoda - Director
Okay.
James Shane Metcalf - Chairman of the Board & CEO
Lee, we're still looking for that dollar amount, just to -- the backlog that we set on the residential side, the Windows, it's up 40% and Sidings, plus 55%. We said low single digits on the Commercial backlog, and we will get you the dollar amount and post that.
Jeffrey S. Lee - Executive VP, CFO, Principal Accounting Officer & Treasurer
We can post that. Correct.
Lee M. Jagoda - Director
And that's -- and those percentages are year-over-year as of the end of Q2?
Jeffrey S. Lee - Executive VP, CFO, Principal Accounting Officer & Treasurer
Yes.
Lee M. Jagoda - Director
Okay. Yes, the dollar amount would be great, and I'll look for it once you post it.
Operator
There are no further questions at this time. Ladies and gentlemen, this concludes today's conference call. Thank you for participating. You may now disconnect.