Kingspan GreenGuard® P1450 Siding Underlayment comprises closed-cell polystyrene (XPS) with perforated capsheets on both sides. It is configured in fanfolded bundles with cut-n-fold hinges. It is lightweight and easy to cut and install. It is designed to be used as a "leveling board", added insulation and added moisture protection in installation of new vinyl siding over old siding.

Features:

• Lightweight, durable...cuts clean and easy
• Premium XPS performance
• Made of synthetic materials that are generally not recognized as providing a food source for insects, fungus, mold or mildew
• Perforated to allow moisture vapor to escape
• Provides a smooth, level nailing surface for new siding