Ply Gem reported second quarter 2014 results with net sales increasing 11.2% to $409.2 million compared to $368.1 million in the second quarter of 2013. Gross profit margin expanded 120 basis points to 21.4% driven by price increases and efficiency improvements, partially offset by integration costs. The windows and doors segment saw a 7.3% increase in net sales due to higher prices and improved product mix, while the siding, fencing, and stone segment increased 14.4% from the acquisition of Mitten completed in 2013.