Standard framing and interior walls, should I remove, insulate and re-install the 3rd stud?
Justin_DeSilva| Posted inEnergy Efficiency and Durabilityon
Renovating a home built in the 1950’s. All plaster and drywall is being removed and replaced with 1/2″ drywall. The 2×4 studs are exposed and the T intersections reveal a non-insulated 3.5×3.5 void.
1. Is it worth the effort of removing the 3rd stud, insulating with 4×4 Rockwool, and reinstalling the stud?
2. I understand it’s not necessary to insulate interior walls, but should I also insulate the first bay to help dampen any thermal bridging from the exterior to interior?
The total number of interior/exterior T intersections is 8. I suppose it’s not that many but didn’t know if the effort is worth the r-value gain.
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Replies
I would fill that void with low expanding foam (Great stuff window and door) drill a 3/8 hole every 12 inches.
What type of sheeting and siding do you have? You may need an air gap behind the insulation.
我会鼓励你设置一个fan to depressurize your house an air seal your wall while the drywall is down.
Walta
Thanks Walter,
After careful consideration I decided to remove the stud, fill with Rockwool Comforbat R15 and replace the stud. The amount of work was less then I expected, and was mainly possible because all neighboring walls drywall and plaster will eventually be replaced.
Presently the exterior wall system is a layer of tar paper, cedar shingles, paint, 1/2" foam, and vinyl siding.
This exterior will eventually be replaced with a peel and stick membrane, 1.5" Rockwool Comfortboard 80, 1x4 furring strips and James Hardie Hardiplank lap siding.