Questions tagged [basement-insulation]

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Insulating solid walls, permeable membrane vs solid insulation

I've got an integral garage being converted to living space (bedroom). Around half the longest wall and rear wall is below ground which is insulated and well drained from the outside. Front wall ...
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49 views

How to fire block/draft block large gaps in the basement?

Coming up on my inspection and I am unsure what to use to fire-block/draft stop parts of my basement. The framing around the perimeter sits between 4" to 6" away from the poured concrete. I'...
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Recommendations for basement insulation where studs do not touch the concrete walls?

I'm working on our basement reno, and am looking for recommendations to insulate. We are in NE Kansas, Climate Zone 5. The basement is below ground. We currently have a reflective foil bubble ...
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535 views

Will I lose a ton of efficiency by removing the blue foam insulation from my unfinished basement?

My house inspection noted that the exposed blue foam insulation in my basement is not to code and (if there’s a fire) could be dangerous due to noxious fumes. The insurance provider has told me to ...
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Newbie questions on framing exterior basement walls

I'm looking into doing some finishing work on my basement, which is entirely unfinished at this time with the exception of some shelving. House is circa 2008 built in Western NY (Zone 5). Foundation ...
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1answer
32 views

Repairing Foil Faced Insulation

I removed some wood paneling which was glued to some foil lined insulation. In the process of removing it, some of the foil facing tore off. What’s the right material to replace this with? If it’s ...
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Can I remove accumulated sawdust from fiberglass insulation?

I have an unfinished basement with framed and insulated (the yellow fiberglass stuff) walls, but no sheet rock. Over time there has been a lot of accumulation of sawdust on the insulation as the area ...
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1answer
44 views

How should I insulate rim joist cavities behind backing blocks?

I am finishing a basement with 2" EPS on the poured walls and then doing the rim joist and sill plate with the same 2" EPS. My question is along 2 sides of the building there are 2x8 ...
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Old basement, insulation and existing framing advice

This post is similar to Mid project finishing basement: should I rip out new framing?, but I'm looking for alternatives. I purchased a house with a basement that was on its way to being finished, but ...
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3answers
88 views

Should the foundation wall be insulated when encapsulating a crawl space, or not?

I've seen conflicting info on this. Some sources say that you shouldn't insulate your foundation wall because moisture can get trapped between the insulation and the wall. Others say that the ...
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2answers
89 views

Basement partition wall sole plate - do I need sill plate gasket?

I am building a bathroom in my basement. It's not a remodel, it's a fully new room from the concrete floor up to the joists. The partition walls will not be touching the cinderblock foundation; there ...
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Finishing around surface mount panel to make flush

This is similar to another question here, but with some significant differences. I'm working on refinishing a basement that was not done up to code. Currently the electrical panel is surface mounted ...
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Cover exposed insulation behind bathroom wall in basement

I have a finished bathroom in the basement and 2 of the walls are shared by a storage room. On the storage room side, there is exposed insulation and pipes I’d like to cover. What can I use to cover ...
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Can I install rigid foam board over vapor barrier that is attached to basement wall?

I recently had my basement waterproofed and a vapor barrier similar to the one in the picture was installed, except our has a dimpled flange at the bottom. We are also getting ready to finish our ...
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104 views

Two openings from inside basement to outside and not sure of the purpose

My basement has two vents from inside to outside. Both are set in-between the main floor joists (see pic) and opens outside, with flaps that opens outwards. The ducts are outside the furnace room. I ...
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273 views

Any issues with insulating exterior 2x4 walls with rock wool, then cover with XPS and drywall?

I am finishing the above-ground basement in my 1950's house, which has 2x4 framing, 16" o.c. I want to insulate as much as possible without breaking the bank (i.e. sprayfoam is out of the ...
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219 views

Must we install a "moisture, not vapor" barrier, room-side, on an insulated above-grade portion of an exterior basement wall [closed]

Must we install a "moisture, not vapor" barrier, room-side, on an insulated above-grade portion of an exterior basement wall Can we forgo installing any " moisture, not vapor, " ...
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1answer
459 views

Faced or Unfaced Fiberglass in a basement stud cavity that has IPS Foil Board?

Insulating in Zone 5. Basement is 90% below grade, maybe 8" to 12" exposed foundation around the top of the basement wall. Applying R-6 Foil Faced Poly Iso to the poured concrete wall, then ...