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5 votes

Vapor barrier (sheet) over concrete pad below ground level deck?

I would not. Your lumber is treated against rot anyway, and poly will mostly serve to trap moisture and encourage mold and odor. Let it breathe.
isherwood's user avatar
  • 141k
5 votes

Can tile, cement, and grout rubble be used as fill under crawl space vapor barrier?

All those things combined don't amount to much volume. If your goal is to install an inorganic layer for sanitation reasons, this doesn't do much for you. You'd need to be sure that no sharp edges ...
isherwood's user avatar
  • 141k
3 votes
Accepted

How do I vapor seal around a fireplace exhaust?

If (as I'd expect) the concentric stovepipe is rated "zero clearance to combustibles" you can seal right to it. The exhaust is in the inner pipe, and the outer pipe is cooled by the air ...
Ecnerwal's user avatar
  • 220k
3 votes

How do I install a vapor barrier on the exterior of an existing wall?

Vapor barriers belong on the warm side of the house. The answer stating that vapor barriers belong on the outside only because air conditioners is assuming that everyone lives in a warm climate and ...
ickybus's user avatar
  • 853
2 votes
Accepted

Vapor barrier under shed floor

This is a subjective question since it's outside the realm of standard building envelope scenarios. I've built two such sheds with similar structure spanning over 20 years. Both had house wrap between ...
isherwood's user avatar
  • 141k
2 votes

Should I use a plastic vapor barrier on foundation walls?

The effect you are concerned about is called "interstitial condensation", in your case, the condensation that occurs within wall cavities. Your vapour barrier must be installed so that the ...
P2000's user avatar
  • 16k
1 vote

Vapor Barrier possibly concealing leaks

Plastic sheeting as a vapor barrier can absolutely conceal leaks. Last summer I worked on a project where we didn't know the extent of the leak until we peeled back the vapor barrier. From the inside, ...
KMJ's user avatar
  • 12.1k
1 vote

Vapor barrier under shed floor

I'm in the exact same situation. I put some Kimberly Clark Block It wrap between the factory floor and the 3/4 inch tongue and groove subfloor. I set the printed side facing down toward the elements. ...
Paul Balga's user avatar
1 vote

How should I prepare a log home for vinyl siding?

I recently installed vinyl siding over an engineered log home. First was a layer of Tyvek Drainwrap, then 4 inches of rigid insulation. I left the bottom open with a doubled over strip of fiberglass ...
Von's user avatar
  • 11

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