GreenGuard P1450 Fanfold Underlayment

Kingspan's performance choice at ¼” (0.25") thick closed-cell extruded polystyrene (XPS) fanfold for use in replacement siding operations; designed to be used as a “leveling board”, adding insulation and moisture protection in the installation of new vinyl siding over old siding. It is configured in fanfolded bundles 4’ x 50’ with crease-fold hinges. It is lightweight and easy to cut and install.

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