Region 5: above-grade renovation insulation improvements
Region 5, East Stroudsburg, PA 18301. Cape Cod style house (bedrooms on 2nd floor in what was once a large attic).
I’m renovating the kitchen on my first floor. I will be pulling down the drywall on the exterior wall and the ceiling.
Currently have R-11 in my 2×4 studwalls, then sheathing, then T-111. Wondering if I should just caulk the seams in the sheathing and around the stud bays. (Can I use Green Glue sealant for this – I have a bunch that I bought – or is a different product suggested). Then adding Roxul R-15 (unfaced?) in the studbays to replace the R-11 and then replacing the drywall – and again, sealing any penetrations in the studwalls, as well as sealing the seams of the drywall before taping.
In the band joist, I was going to either have my foam contractor spray Lapolla 4G, or if I can’t coordinate it with his visit, I was going to maybe use a DIY spray product. I know 3″ of closed cell foam is recommended on basement walls and bandjoists – but is the same also advisable on my first floor bandjoist in this case?
Another option that I considered, based on suggestions I’d read that were made to others – was to add either 1/4″ fanfold XPS, or 1/2″ EPS continuous to the interior prior to drywalling. I’m hesitant to do this, because it will slightly affect my window and door jamb measurements. I actually just ordered new replacement windows (Starmarks) – I suppose I could call him and have a modification made to the windows, but I wasn’t planning to change the door right away. I just feel it would complicate things more than I’d like to deal with, so I’d prefer a solution that doesn’t require extending the wall inside if possible. If there’s a tremendous advantage over caulking and R-15, then I could look into it, but I’d prob have to call him by tomorrow.
I’m going to have some can lights, and speakers in the ceiling, so I know that sealing the band joist will be very beneficial. Unfortunately, I won’t get to the opposite band joist on the other end of the joist bays at this time – should I perhaps spray foam above the main beam to fill the entire bay, to separate the 2 lengths of the joist bay on either side of the house, so that the kitchen is sealed off on both sides at least?
One other question I had was if there was that I was going to be adding a 6″ vent pipe for my range hood, through the ceiling joist about a 4′ horizontal run direct out through the band joist. Is there anything in particular I should do to minimize the energy penalty here? Wrap the entire length of the vent pipe with insulation?