Drywall Prep: Insulate with Polyiso around Doors

We are cutting and fitting the polyiso left over from the wiring chase around the door areas to use up smaller pieces.

Cut and Fit Polyiso

Cut and Fit Polyiso

By using the polyiso so sparingly we can keep more of it tacked up as temporary bathroom walls.

More cut and fit

More Cut and Fit

The wiring chase is not finished but progress is being made.

Another large area that needed polyiso insulation to seal it was the opening to the attic for wiring. I had to spray foam into the wiring holes and a bit into a crack between the attic and the entry area to the wiring chase first. Then I cut a piece of 1″ foil covered polyiso to fit the opening. I used some leftover telephone wire to hold the foam against the opening and stapled it to the 2 x 4’s.

Wire Stapled to 2 x 4

Wire Stapled to 2 x 4

I had to cut a hole for the vacuum piping and then seal it all with spray foam. The spray foam was a bit awkward and the job was rather messy. I got spray foam all over my hands and some on my arms! But I have some cleaner that helped remove most of the stray foam from my body. I’ll have to trim extra stuff on the wall with a razor knife.

Spray foam sealing job

Spray foam sealing job

If we have enough 1 1/2″ polyiso I may fit a piece between the 2 x 4’s in front of the foil covered piece. After the polyiso is finished we can move on to installing the Siga membrane.

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