Window and Door Installations in “Thick” Walls
In reading various posts, I have noticed some innuendos and outright comments regarding the difficulties of installing windows and doors in framed walls with out-sulation and double stud walls. Being a novice at best, I would really love to hear opinions about the trials and tribulations involved. To structure the discussion a bit, please assume two wall designs.
Design 1: Drywall, 2x6 24” OC studs filled with R-23 MW batts, taped plywood sheathing (air barrier), 3” MW, WRB, furring, siding.
Design 2: Drywall, 2x4 16” OC studs filled with R15 MW batts, 2” gap filled with MW, 2x4 16” OC studs filled with R15 MW batts, taped plywood sheathing (air barrier), WRB, furring strips, siding. Outer (structural) wall and MW-filled gap between walls extend down to foundation/sill in front of the band joist to reduce thermal bridging.
I am leaning towards “outie” windows (hence the placement of the WRB in design 1 on the exterior of the MW out-sulation).
Although I am primarily interested in comments regarding the installation of windows and doors, I am always open to opinions about relative strengths and weaknesses of the two designs. With that in mind, I would plan on insulating the band joist from inside the basement as well (in both designs). The house is to be built in CZ 6 (inland 20-30 miles from midcoast Maine).
Thanks for your input.
Posted Aug 11, 2014 10:22 AM ET
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