Soil Stack Penetrations

This has got to be the most exciting topic HZG has talked about...today...

The most common attic penetration in homes is the soil stack. During construction, the builder cuts a square in the attic floor (top floor's ceiling) and installs the round soil stack. Insulation may or may not have been blown at that time. Regardless, you have a round peg in a square hole - usually enough for a nice soil stack air loss effect.

ANY home owner can seal this off with a $7.00 can of foam, unless the builder got extremely carried away with the saw. At that point, you would need a piece of foam board and caulk to go along with the foam.

Easy speazy - fix it yourself.