Peter Arvan
President and Chief Executive Officer at Pool
Thank you, Melanie, and good morning, everyone. Earlier today, we released our third-quarter results, highlighting solid performance in our maintenance-related sales and continued progress on our strategic priorities. Our results reflect our team's coordinated efforts and our exceptional ability to fulfill our customers' needs and deliver an outstanding experience during the critical peak season. With our expanded product offerings, enhanced customer service tools and resources, and the ability to quickly deliver through our expansive distribution network, we continue outperforming the market during the dynamic economic conditions our industry has experienced over the past few years.
In the third-quarter, total sales declined 3% as we saw similar year-over-year trends as last quarter with an extra selling day this year versus last. Our maintenance product offerings generated steady sales growth, while the discretionary portion of our business continued to experience impacts from a hesitant consumer. We see pressure on entry to mid-level prospective pool buyers while demand for higher-end pools remains resilient. We have made great progress on several of our strategic priorities from network expansion, capacity creation, and pricing optimization to growing our private-label product sales and increasing adoption of our POOL360 ecosystem.
Moving down the income statement, gross margins finished in line with prior year, signaling progress on our structural margin initiatives, especially considering the drag on our product mix from headwinds in new construction and renovation and remodel. Melanie will go into more detail on this in her financial commentary. From a profitability standpoint, we produced operating income of $176.4 million and operating margin of 12.3%. We generated diluted earnings per share of $3.27, including a $0.1 tax benefit from ASU. Looking at sales by geography, we saw sales grow by 1% in Florida with underlying demand holding up well to support Florida's growing installed-base.
This is the first major market this year to post a positive sales trend, which is very encouraging. Arizona sales were flat, which is also somewhat encouraging from a cyclical standpoint as it was one of the first areas that showed signs of a slowdown back in 2022. If I look only at the pool business for Arizona, they too had a positive quarter helped by excessive heat, which created headwinds for our Horizon business there. Texas and California sales were down 6% and 3%, respectively, reflecting the weak discretionary spending that is impacting our overall business. Texas also experienced excessive rain and cooler temperatures in July that adversely impacted maintenance needs during this key seasonal period.
For Horizon, net sales declined 7% in the period compared to the third-quarter last year and consistent with what we have seen so far in 2024. Residential construction and remodel remain challenged, while commercial construction is slightly better with demand relatively flat. Similar to the pool business, the maintenance part of Horizons business is stronger, although it makes up a much smaller portion of the business comprising approximately 25% of sales. Europe finished the quarter down 1%, much improved sequentially. This area has been challenged with a tough market and weak consumer sentiment since the spring of 2023.
Europe's third-quarter results reflect the summer season and peak pool usage and will likely be more impacted by a cautious consumer behavior in the fourth-quarter due to the uncertain macro environment. Turning to our product categories. Chemical sales increased 2%, supported by mid-teens growth in our private-label chemical products and overall volume growth of 4%, exceeding the increase in the installed base. Chemical pricing has remained relatively stable, which is encouraging given the dynamic market conditions we have seen in the past. Building materials sales showed a 9% decline consistent with last quarter and while reflective of a tougher new construction and remodel environment performed better than projected industry estimates for new pool builds this year.
This better than market building -- market building material results highlights the power of our over 100 NPT showrooms, bringing our unique product offering to the customer with our design tools and the broader selection of decking tile and pool finish for our customers. Equipment sales, which exclude cleaners increased 1% this quarter, bolstered by a recovery in heaters and solid demand for pumps, lights, electrical products, and filters. Some of this product category is nondiscretionary in nature, however, items like heaters and lights can be more discretionary and impacted by consumer sentiment.
As we have mentioned, aftermarket equipment installations are roughly four to five times that of new construction and combined with price increases that have been realized in the market, these products are holding up well even with lower discretionary spending. In our end markets, our commercial sales increased 7% during the quarter, showing continued strength through the summer travel and community pool season. Sales to our independent retail customers declined 2%. These retail sales represent our wholesale sell in to the retail dealer channel, which ultimately serves the DIY market.
The improvement from what we saw in the second-quarter reflects the strength of our service, product offering, and the value that our retail trained sales support teams provide during the swimming pool season. For Pinch A Penny, our franchisee sales to their end-customers were flat, boosted by strong -- a strong store presence in year-round markets and a premier customer and product service offering. We continue to make progress on our POOL360 platform initiatives, orders processed through our B2B POOL360 application, the foundation of our digital ecosystem increased to 14.5% of total sales for the quarter.
While we are in the early innings of introducing our expanded suite of customer-facing tools, we consider this metric to be the most meaningful in measuring our progress at this time. Beginning last year, we introduced POOL360 water test to our independent retail customers and have developed a similar application that is embedded in our POOL360 service software product, which we debuted -- debuted[Phonetic] earlier this year just before the season began. We believe both tools when combined with our incredible footprint, extensive inventory and growing private-label brands provide a value proposition that cannot be matched in the industry.
As I mentioned, we are early in the game. We continue to add innovative features and provide hyper-responsive support for the early adopters to be sure that we -- that as we scale, we deliver on our commitments to our customers. During the quarter, we embarked on a journey around the country with our POOL360 roadshow, taking the tools and training directly to our customers in key markets via a dedicated POOL360 team. Our employees' enthusiasm and dedication played a crucial role in generating awareness and excitement around our software solutions, showcasing the incredible value they bring to our customers.
It's exciting to see our teams connect with so many pool[Phonetic] professionals and their positive responses to our innovative new programs and solutions. Our relationships with customers are deep as we have been their trusted supplier for decades in many cases, combining trust and strong relationships with innovation and pool industry knowledge is enabling us to introduce feature-rich software to help our customers grow and improve their capacity while strengthening our ability to grow share into the future.
Now let me update you on our network expansion activities. We opened three new sales centers during the quarter, bringing our year-to-date openings to nine, well on track to achieve our stated goal of 10 openings this year. Our Pinch A Penny franchise network added three new stores, including two in the strategic Texas market, bringing their store openings to 11 so far this year and ending the quarter with a total of 295 franchise stores.
Now let me share how we see the remainder of the year shaping up. We would expect fourth-quarter sales to be in line with the year-to-date performance considering our results through the peak swimming pool season and our fourth-quarter outlook, we are maintaining our full-year diluted earnings per share guidance range of $11.06 to $11.46, including updated $0.21 estimate -- an estimated benefit from ASU. For the full-year, we believe new pool construction could decline closer to 20%, but still fall within our forecasted range. This includes the potential storm impact on pool construction in Florida where last year approximately 6,000 pools were built in the fourth-quarter.
Given the storm damage and repair activity, it is not likely we will see similar levels of new construction for the balance of 2024 in Florida. We would expect new pool construction and remodel activity for the balance of the markets to be in line with previous guidance for the remainder of the year. For the overall business, we believe maintenance and repair activity will be steady with the notable exception of Florida where it will be higher as storm damaged pools are repaired. Given the normal seasonality, maintenance will be less of a contributor in the fourth-quarter in our remaining markets.
Hurricane Francine and Helene in the third-quarter and Milton in the fourth-quarter created short-term disruptions to our business. We sustained only minor damage to our facilities with operations restored quickly so that we could help our customers repair the damage ahead of the busy season in Florida. Looking ahead, we remain encouraged by several economic factors such as stable home values, record home equity levels, continuing Sunbelt migration, and a resilient consumer and gradual interest-rate easing. We expect a healthy setup for the industry dynamics and favorable growth opportunities in correlation with the broader housing market stimulation in coming years.
Swimming pools and outdoor living, are still very desirable and no one is better positioned to capitalize on that now and in the future. Our industry is 20% to 25% bigger than in 2019. The past five years have been volatile compared to the industry history and with rapid growth followed by a period of lower discretionary spending, but we believe it is coming closer to normalization. Our network is the largest, most integrated in the industry, allowing us to provide the greatest variety of products and serve as an extension of our customers' business and to cultivate our vendor partnerships, providing what our customers need when they need it and bringing the latest product innovations to market.
Our efforts to elevate our customer experience, help improve their business and operate with disciplined execution make us the best positioned to grow share in both periods of growth and normalization. We believe we are the clear market leader and we are getting stronger every day. Before I turn the call over to Melanie, I would be remiss if I did not once again thank our incredible team. Their knowledge, dedication and creativity, and passion for the industry and customer experience are amazing and I could not be prouder to be part of such an extraordinary team. I will now turn the call over to Melanie Hart, our Vice-President and Chief Financial Officer, for her detailed financial commentary. Melanie?