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