Questions tagged [basement-insulation]

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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
37 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
77 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
52 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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0answers
19 views

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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2answers
30 views

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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0answers
72 views

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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2answers
87 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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1answer
182 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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1answer
131 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
400 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 ...