How To Insulate Floor Joist Pockets
Insulating rim joists pockets.
How to insulate floor joist pockets. Rim joists are above grade so it makes sense to insulate the joists to the same level as above grade walls. This is an effective method for air sealing this area while still being easy on the pocket book. The pockets between the joists were not insulated. A merry christmas to everyone.
Properly insulating and air sealing rim joists band joists takes patience so most builders simply stuff in some fiberglass and walk away. We live in michigan and its cold now even without the snow. Have work shop and family room downstairs it seems to get chilly after. Sealing and insulating rim joists.
I filled the pockets with insulation 2 pieces of fibreglass to total 5 5 inches thick then sealed the pockets with a piece of polyethylene. We have a ranch with a full basement and craw space. At the rim joist area many building components come together the foundation wall the mudsill the rim joist the subfloor so it s also important to seal all cracks against air leakage. In cold humid or mixed climates the foam board thickness needs to be 2 thick to stop the condensation in the rim joist area.
On one side of my house where the joist runs parallel to the outside wall i insulated and put poly part way only but could not seal it because of a. If the foam board is properly sealed additional fiberglass. If you have an unfinished basement you can properly insulate the rim joists in two or three hours. Have a question about insulating my rim joists in basement.
This may be a bit long so bear with me.