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A cantilever hangs out past the foundation walls of a home and can allow for external air and temperatures to impact the inside of the home if not properly insulated and sealed. Cold air from outside can make the floors connected to the cantilever cold and allergens or dust from outside can work its way into the air inside of the home. Spray foam insulation is a great way to not only insulate the floors connected to the cantilever, but to air seal the space to allow for better air control in the home.
There were severs drafts coming through the knee-walls of this Alexandria, VA home. Comfenergy used closed cell spray foam to air seal and insulate them to stop these drafts.
Closed cell spray foam was used to insulate the exterior walls of this basement remodeling project in Alexandria, VA.
Protecting conditioned, heated or cooled air, from an HVAC system can help lower energy costs. As air passes through the metal duct system it can react to room temperatures where the ducts are. A cold room with a metal duct can cool heated air moving through it, just as a hot attic with a duct in it can impact the cold air passing through it. Encapsulating HVAC ducts with spray foam keeps the environment inside of the duct safe for conditioned air to travel through.