Robert Pagano
Analyst · Stifel
Thanks, Tim, and good morning, everyone. Please turn to Slide 3 in the presentation, and I'll provide an overview of the quarter.
First, I must again applaud the efforts of all our employees for adjusting to the challenges of the pandemic. Our employees have remained deeply engaged with our customers whether working on site or remotely, delivering our products on time and with the quality they have come to expect in the Watts' solutions. The teams have worked diligently while adhering to safety protocols to ensure we maintain close customer contact through order fulfillment, training and responding to inquiries. And while travel is restricted, we've expanded virtual plant tours which allows local leaders a chance to update senior management on their most recent customer and operating initiatives. These virtual tours are also promoting greater employee engagement and helping to drive productivity during these difficult times.
Our third quarter operating performance was solid as we again delivered results that exceeded our internal expectations. Our seasoned management team has played a critical role in taking proactive actions that have optimized the performance of the business despite challenging underlying market conditions. The sales decline in the quarter was less pronounced than we had anticipated, both in the Americas and Europe. Despite the tough macro environment, we maintained our focus on driving our smart and connected strategy.
We also increased adjusted operating profit and expanded adjusted operating margin versus Q3 last year despite the lower sales volume. This was driven primarily by the aggressive cost actions we've undertaken in response to the pandemic. Cash also remains a focal point and year-to-date, we've increased free cash flow by 25% as compared to the same period last year. Operationally, we've now instituted all cost-out programs we discussed earlier this year. During the third quarter, we estimate total run rate savings approximated $20 million. Year-to-date savings have totaled $42 million. We continue to review additional cost actions to support operational efficiency. Shashank will review the financial results in more detail momentarily.
Now I'd like to provide our current views of the market. In the Americas, the construction industry is adjusting to the new normal, while job sites that were already under construction are back online and being driven to completion. Residential repair and replacement demand was encouraging through the third quarter as we saw continued strength in our DIY channel, and September's record existing home sales support continued growth there. Our products that go into hydronic and electric heating applications and residential irrigation should continue to perform well.
The new single-family home construction market is performing well amid low interest rates, and demand is strengthening as people migrate to the suburbs. Year-over-year housing starts have been positive since June, and permits are also up. We'll continue to focus and capitalize on residential opportunities especially in the higher-end, single-family homes.
In Europe, we saw many companies working through the traditional August vacation holiday to catch up on project backlogs and support customer restocking efforts. German OEMs benefited from ongoing government energy efficiency subsidies, and China continued to lead in rebounding from the pandemic.
Conversely, there are a number of developments that are concerning. Many of the current COVID-19 trends we are seeing around the world are worrisome and impact all our markets. I realize we are 9 months into this pandemic and the markets have stabilized to some degree, but COVID-19 is still driving a lot of end-market uncertainty. So with that as a backdrop, our worldwide markets are currently mixed.
Traditional macro data like ABI and the construction industry competency index and other information we've recently assessed are portending a slowdown in our commercial markets into 2021. As a result, we expect that new construction in the commercial building sub-verticals of hospitality, office, retail, multifamily and commercial marine will continue to be challenged. However, we do expect that there will be continued growth in the health care, data centers and food and beverage markets. Our teams are leveraging our expansive product breadth and channel reach to focus in on these growth sub-verticals.
In nonresidential repair and replacement whose growth traditionally followed GDP, we see repair and replacement being impacted by the deferring of discretionary replacement and renovation given the magnitude of the pandemic. Break and fix activity should grow especially given our large installed base. Renovation and retrofit activity may be softer, especially in the challenged hospitality and commercial submarket.
Regardless of how the markets unfold next year, we are confident that our diversified product portfolio and unmatched distribution capabilities should provide us the flexibility to shift our focus to meet the demand in those products, markets and regions that offer us the best growth prospects during this difficult time. And we'll continue driving our smart and connected solutions that we believe will be critical as we transition into the new normal.
So overall, we are currently cautious about our initial market outlook for next year. We see pockets of growth opportunities, but uncertainty driven by the continuation of the COVID-19 pandemic is causing the markets to pause. As I've said before, commercial construction activity slows during periods of uncertainty and we're clearly at that point in the North American, European and Middle East markets. Our view on 2021 is evolving as the markets remain in flux and as our team continues to formulate their operating plans for next year. We'll provide further growth expectations during our February 2021 earnings call.
As for our fourth quarter outlook, we expect sales will be soft compared to last year and we anticipate operating margins to improve relative to last year but at levels below the third quarter as temporary cost reductions are partially phased back into the business.
Let me now turn the call over to Shashank who will discuss our third quarter operating performance and provide more detail on our fourth quarter outlook.
Shashank?