: Websites like Insulation4US and Pexuniverse offer a wider range of densities and specific-use boards (e.g., under-slab or joist-specific).
Attics and walls where high R-value and fire resistance are needed. (Expanded Polystyrene) SilveRboard R10 Rigid Board Insulation Go to product viewer dialog for this item. Budget-friendly option for under-slab or general sheathing. Key Features to Consider where can i buy foam insulation board
: XPS is highly moisture-resistant, making it the standard for below-grade or foundation use. : Websites like Insulation4US and Pexuniverse offer a
: Suppliers like Woodland Building Supply or Arnold Lumber often stock specialized professional-grade materials. Popular Products by Type The "best" board depends on where you are installing it. Recommended Product Best Use Case XPS (Extruded Polystyrene) Owens Corning FOAMULAR NGX F-150 Go to product viewer dialog for this item. Basements, exterior sheathing, and moist environments. Polyiso (Polyisocyanurate) Johns Manville AP Foil Faced Polyiso Go to product viewer dialog for this item. Budget-friendly option for under-slab or general sheathing
📍 : Many large retailers offer "Buy Online, Pick Up In-Store" options which can save you significant delivery fees on bulky 4' x 8' sheets.
: Polyiso typically offers the highest R-value per inch (approx. R-6.0), followed by XPS (R-5.0), and EPS (R-3.6 to R-4.2). Moisture Resistance