Structure Premium Insulated Siding is the cream of the crop. The best of the best. The most advanced finishes and formulations on the market. When you need added thickness, superior performance, distinctive styling or innovative protection, it’s here.

Structure siding is a premium vinyl siding permanently bonded with STYROFOAM brand extruded polypropylene (XPP) foam from Dow, a recognized leader in insulation. Dow premium foam is stronger and 30% more impact resistant than standard foam. Structure siding panels also feature our patented T3-Lok System which tighten under pressure to withstand winds up to 160 mph!

Structure Premium Insulated Siding provides a significant improvement to your home’s R-Value (resistance to heat flow) of up to 25%, and retains 97% of its R-value when exposed to moisture over time. This results in lower energy costs and improved climate control. Structure siding also offers increased noise reduction by up to 30% at critical frequencies.

Structure is designed to be the answer to the most demanding design and construction challenges.

Backed by our best-in-business warranties, our innovative vinyl siding products were constructed to outperform and outshine any other brand, and come in an endless array of colors that reflect your personal style.

Homeowners may qualify for a federal personal income tax credit of up to $500.00 by purchasing and installing our ENERGY STAR approved Structure siding. By allowing less expenditure of energy, Alcoa Structure siding helps reduce air pollution and global warming associated with energy production.