Raised and On-Grade Slab Edge Insulation

Verify all bulk sources of moisture have been directed away from the slab (i.e., gutters, flashing, grading, drainage)

Wall sill plate and slab edge penetration air sealing is completed

No active pest intrusions exist

Select insulation that is rated for ground contact and is a class I vapor retarder

Select sealants that:

are compatible with their intended surfaces

allow for differential expansion and contraction between dissimilar materials

meet the requirements of the applicable fire safety code (e.g., thermal or ignition barriers)

are low volatile organic compound (VOC) sealants for use inside the pressure boundary that meet independent testing and verification protocols

Prepare slab edge to receive insulation and/or sealing materials per manufacturer specifications

Excavate slab edge to prescribed depth and width for installation while avoiding undermining slab footing or damaging underground utilities or drainage

Protect excavation from weather until restored to original condition (e.g., density, drainage function)

Install insulation to prescribed R-value in contact with the slab edge, without voids, compressions, or misalignments and tight to any utilities penetrating the slab edge insulation

Install continuous and permanent flashing to direct water away from the foundation and slab edge insulation

Cover exposed insulation with a durable, rigid, and pest-resistant material

Seal all slab edge penetrations using a compatible sealant

Stuff any gaps 1/4" or greater with copper or stainless steel mesh prior to sealant application

Preserve existing termite treatment and inspection gaps as required by applicable codes

Restore excavated earth and grade to drain bulk moisture away from foundation

Post a dated receipt signed by the installer that minimally includes: Installed insulation type, coverage area, installed thickness, and installed R-value