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R10 High Density 35 PSI Under Slab Insulation Kit - (10 Sheets) 2 in. x 2 ft. x 4 ft. - 80 sq. ft.

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  • Helps to maintain moisture and air barrier
  • Made from polystyrene for prolonged use
  • Suitable for driveways, commercial slabs, and foundation walls
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Product Details

SilveRboard HD ( high density )- (10 sheets, 2 ft. x 4 ft. x 2 in. - R10) 80 sq. ft. under slab insulation is a high performance, high compression strength (35 psi) flat-sheet insulation material made from expanded polystyrene (EPS) which is bonded to a reflective film laminated on both sides. This highly effective combination of materials offers a high R-value per inch exceptional board toughness and load capacity compared to traditional flat-sheet rigid foam insulation, as well as provides a built-in moisture and air barrier. This non perforated SilveRboard rigid foam insulation (EPS) offers builders a higher performance product which increases job-site efficiency and reduces labor costs. No off-gassing and does not contain fluorocarbons, exceptional long-term thermal resistance (LTTR), and increased thermal resistance in lower temperatures.
  • SilveRboard SB35 high density is a non structural rigid insulation board with a layer of reflective metalized polypropylene film on both sides which increases board strength and flexibility reducing job site and handling damage and waste
  • Designed to be installed below-grade and under high- load concrete slab applications, as continuous insulation, includes a vapor barrier and reduce thermal bridging - ideal for under commercial slabs, driveways, sidewalks and foundation walls
  • Exceptional long-term thermal resistance in lower temperature - SilveRboard insulation installed below-grade outperforms XPS insulation: exhibiting better R-value retention and a lower moisture absorption over extended freeze-thaw cycles
  • Creates a thermal envelope for maximum heat/cooling efficiency, the non-perforated film functions as a vapor barrier when joints are taped with an approved vapor barrier tape
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Cover Area Per Bag (sq. ft.)80 sq ftCoverage Area (sq. ft.)80 sq ft
Product Length (ft.)2 ftProduct Thickness (in.)2 in
Product Width (in.)48 in


Compatible Install SurfaceCement, Concrete, Existing Drywall, Existing Insulation, PlywoodFaced or UnfacedFaced
Insulation FeaturesFormaldehyde Free, Moisture Retardant, Mold Resistant, Vapor RetardantInsulation Location2x4 Wall, 2x6 Wall, 2x8 Wall, Attic, Basement, Ceiling Insulation, Crawlspace, Exterior Sheathing, Garage, Metal Building, Re-Siding
Insulation R-ValueR10Insulation TypeFoam Board Insulation
Interior/ExteriorInterior/ExteriorNumber of Pieces10
Pack Size1Product Weight (lb.)30.5 lb
Returnable90-DaySheathing Size2 ft. x 2 in. x 48 in.
Sheathing TypeEPS

Warranty / Certifications

Warranty InformationAmvic Inc. offers a limited 25 year warranty on all our SilveRboard products. We warrant to the Qualified Owner that our SilveRboard sheets (the Product) will be free from manufacturing defects.

Questions & Answers

Q:Are there any concerns with layering this product 2 thick in order to achieve an R20 insulation rating?
by|Dec 4, 2023
1 Answer
Answer This Question

A:  No- There si no problem at al - generally when using multiple sheet layers, we cross stack the product. Taping is only required on the lower level to make the assembly water and vapor resistant . Good Luck, HC

by|Dec 4, 2023
    Q:Can this be used in wall of travel trailers?
    by|Sep 13, 2023
    1 Answer
    Answer This Question

    A:  Yes- It is also mold and mildew resistant - please note this foam is very rigid and not easily bent to match contours . Will work very well and last forever . Good Luck, HC

    by|Sep 14, 2023
      Q:can you coat with fiberglass or dryvit
      by|Sep 3, 2023
      1 Answer
      Answer This Question

      A:  You can cover not coat Any covering like stucco will require self adhesive mesh and mechanical fasteners . Febergkass batts must be mechanical fastened to the studs directly Good luck HC

      by|Sep 4, 2023
        Q:Is this product resistant to water? Can be temporary stored outdoors?
        by|Aug 25, 2023
        1 Answer
        Answer This Question

        A:  It is totally resistant to water , but will absorb a very tiny percentage, but that is immersed in watre - storage outside is 100% okay - should not be stored for more than 6 months in the sun though. Good Luck, HC

        by|Aug 26, 2023
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