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Between the ICF foundation walls, the builder sprayed closed-cell spray foam directly onto the gravel base to provide a vapor barrier and continuous layer of insulation under the slab.
Concrete is poured into the rigid foam shell of the insulated concrete form (ICF) walls; a plastic water barrier has already been installed to protect the below-grade wall surfaces.
Right – 11-inch ICFs provide R-50 of wall insulation from the footing to the roof on this cold-climate home.
Right – Insulated concrete forms (ICFs) provide the insulated stem wall for the slab-on-grade foundation for this SIP house.
Right – Two inches of rigid foam was installed on the ground before pouring the basement floor slab while precast, pre-insulated concrete panels comprise the basement walls.
Seams in the ICF block are sealed so the EPS foam surface can serve as the drainage plane; no house wrap is needed.
The floor slab is completely insulated with ICF foundation walls and R-20 (3 inches) of closed-cell foam that is sprayed directly onto the ground before pouring the slab.
The foundation walls are ICF block providing two continuous layers (R-23) of insulation around the slab, which will sit on an additional 4 inches (R-20) of low-VOC EPS foam.
This community of production homes in central New York state was built with insulated concrete forms (ICFs), which provide a highly insulated, airtight structure that is fire-, pest-, wind-, and earthquake-resistant.
Wiring runs are covered with canned spray foam to maintain the continuous foam layer that covers the inside and outside of these ICF block walls.