Closed Cell Foam Insulation
This is a closed-cell polyurethane foam that is applied to block walls and perimeter band wood joist. Applied at 1.5” thick for an R11 value for a continuous air-tight seal. A 4” strip is left exposed near the top of the block for termite inspection. It is applied in areas where relative humidity levels exceed 55%. Our Guardian Liner is applied a minimum 16” up onto walls. This foam is used to seal the top of our liner to the block wall because of its glue type properties and air-tight seal. This foam is waterproof so any dampness in foundation block will not disturb or break down the foam over time.
Due to the materials and process of the spray foam application and per the manufacturer of these materials it is recommended to vacate an occupied dwelling for up to 24 hours while the application is being done. It is also recommended to shut down your HVAC system during and 1-hour AFTER the application of the foam spray. In the 12 years Delaware Crawlspace Company has utilized this foam application it’s important to know there haven’t been any issues during the foam application. However, we like to inform our clients about the full details of our installation.
