Sheathing & Siding Underlayment

Expanded Polystyrene (EPS)

Sheathing and siding underlayment create a stable R-Value energy barrier needed on all frame-type construction. Exterior sheathing lessens thermal breaks caused by studs, headers and rim joists. Sheathing and siding underlayment provide a flat and level surface for new siding.

Foam-Control® PLUS+® sheathing & stucco board is an architectural insulation with high compressive strengths, high R-values, and moisture resistance.

Polar-R® and Polar Fold® siding underlayment combine high performance EPS with strong film facings, making it extremely moisture resistant and durable.

Types of Sheathing & Siding Underlayment Available

Foam-Control® PLUS+® Sheathing: An architectural insulation with high compressive strengths, high R-values, and moisture resistance.  Available in 4' x 8' sheets in 15, 25, 40, & 60 psi strengths.

Foam-Control® PLUS+® Stucco Board: An architectural insulation with high compressive strengths, high R-values, and moisture resistance.  Available in 1” thickness in 2’ x 8’ or 4’ x 8’ sheets with tongue and groove joints.

Polar-R® Siding Underlayment: Film faced sheathing. Available in 4’ x 8’ sheets.

Polar Fold® Siding Underlayment: Film faced sheathing. Available in 4’ x 50’ fan-fold sheets.

Polar-R® Weather Resistive Barrier: Film faced weather resistive barrier for stucco, masonry & other finishing materials. Available in 4’ x 8’ sheets.