Q350TS

TopShield® Q350TS Siding Underlayment is a high-performance, 0.3" thick closed-cell extruded polystyrene (XPS) underlayment, supplied in convenient 4' x 48' fanfold bundles. Lightweight and easy to handle, it is designed to provide insulation and moisture protection when installing new vinyl siding over existing siding, serving as an effective "leveling board" for a smooth, durable finish.

Benefits & Features

• Lightweight & Durable: Easy to cut and install with no loose foam beads, ensuring a clean, hassle-free application.
• Convenient Fanfold Design: The 4' x 48' fanfold bundles are compact for efficient storage and quick installation.
• Superior XPS Performance: Offers excellent insulation and moisture resistance, helping to maintain the integrity and energy efficiency of your siding.
• Cost-Effective Solution: Provides reliable performance at an economical price point, making it an ideal choice for budget-conscious projects.
• Moisture Vapor Permeable: Perforated to allow moisture vapor to escape, preventing trapped moisture and promoting a long-lasting, healthy siding installation.