Rigid Insulation Floor Joists
Less than the height of the rim joist.
Rigid insulation floor joists. Second i have foundation vent all around the house should the remain unblock or do the need to be covered. Use foam sealant such as great stuff to seal the joints. Cut the foam into 8 ft long strips 1 8 in. Use caulk or foam sealant to seal the joint between the top.
The fiberglass will also need to be secured in place using wire mesh twine wood laths or other securing methods which can be an intensive project that adds to the overall cost. A do it yourself friendly method for sealing and insulating the rim joist or band joist area is to use rigid foam up against the rim joist. The floor joists are all fastened to the rim joist which runs along the. Seal and insulate using rigid foam board insulation.
Clarification for march 23rd e mail. This method can be hundreds of dollar less than the cost of using the commercially applied spray foam. Fill the ends of joist bays with rectangles cut from rigid board insulation. We chose 2 in thick r 10 extruded polystyrene don t use expanded polystyrene which is a less effective air and moisture barrier.
Trim pieces of fiberglass insulation using a utility knife so the pieces fit into joist bays along the rim joist. Gaps between the insulation and the floor can lead to inefficiency and heat loss.