Exterior Edge Insulation for Existing Foundation Slabs Description Guide describing how to install slab edge insulation when retrofitting existing slab-on-grade foundations.
Rigid Foam Insulation Installed over Existing Foundation Slabs Description Guide describing how to insulate an existing slab floor by adding rigid foam insulation over the slab then installing a floating subfloor.
Water Management of Existing Basement Floor Description Guide describing how to retrofit an existing basement floor or slab to reduce moisture issues.