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Insulating Under the Slab
It is important to insulate slabs to reduce the potential for condensation (or sweating) on the slab and to reduce energy loss and increase comfort. And, it is critical to insulate slabs that are going to have floor coverings installed over them to reduce the potential for condensation and mold. It is easy to insulate under the slab before the concrete is poured (placed). STYROFOAM™ extruded polystyrene insulation offers high moisture resistance, compressive strength and R-value and is ideal for this application.
There is a STYROFOAM insulation product that is right for insulating under every slab:
| My project or needs are: |
Recommended Product Solution |
Installation Instructions/Considerations |
Building Code Compliance |
| Insulate under basement slabs and under concrete slabs of living areas. |
STYROFOAM SCOREBOARD™ |
N/A |
Complies with ASTM C 578 Type IV. Meets IBC/IRC requirements for foam plastic insulation. See ICBO-ES ER 2257, BOCA-ES RR 21-02, NES NER 699, Und. Lab. Inc.® Classified, see Classification Certificate D369. |
| STYROFOAM Square Edge |
N/A |
Complies with ASTM C578 Type IV. Meets IBC/IRC requirements for foam plastic insulation. See ICBO-ES ER 2257, BOCA-ES RR 21-02, NES NER 699, Und. Lab. Inc.® Classified, see Classification Certificate D369. |
| STYROFOAM Tongue & Groove |
N/A |
Complies with ASTM C 578 Type IV. Meets IBC/IRC requirements for foam plastic insulation. See ICBO-ES ER 2257, BOCA-ES RR 21-02, NES NER 699, Und. Lab. Inc.® Classified, see Classification Certificate D369. |
| Insulate under slab and resist termites tunneling through foam. |
STYROFOAM BLUEGUARD™ |
View Installation Instructions
Download Installation Instructions (200KB PDF) |
Meets IBC/IRC requirements for foam plastic insulation. Meets ICC-ES acceptance criteria of ICC-ES EG-239 Evaluation Guide for Termite Resistant Foam Plastic insulation for use in heavy termite infestation areas. (ICC-ES NER-699 udate in progress.) |
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