my floors in my 1960s ranch House are freezing cold and in some areas drafty to a degree my neighbor said I should put vent covers on the little vents on the crawlspace walls outside the house… is this a year-round thing just leave them up there is there any danger of foundation issues like from the air not being able to flow?

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Posted by iwantacooler

Pig Nose Feet

Member since Aug 2017

2723 posts

Posted on 1/26/26 at 12:08 pm to MisslePig

During really cold weather I cover mine. I’m trashy (actually I live where nobody can see my house) and I use foam board insulation cut to correct size, but I’m sure there is something more decorative. I do know they make vents that will automatically close once the temp dips below a certain number, mid 40s it seems? Definitely remove during warm weather to have airflow and prevent moisture buildup.

This post was edited on 1/26/26 at 12:13 pm

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Posted by Motorboat

At the camp

Member since Oct 2007

24011 posts

Posted on 1/26/26 at 3:22 pm to MisslePig

quote:
is this a year-round thing just leave them up there is there any danger of foundation issues like from the air not being able to flow?

If the holes are a standard size, you can find covers. If they are not standard, you will need custom made vents. good luck finding them for a reasonable price.

The amount of airflow can affect how dry the crawlspace is and cause moisture issues. best to leave alone, but in this cold, dry weather, a foam cutout for warmth will not hurt.

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Posted by Turnblad85

Member since Sep 2022

4978 posts

Posted on 1/26/26 at 5:47 pm to MisslePig

its usually fine to cover for the cold months. dec, jan and feb. Just don't forget to remove for the humid spring and summer.

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Posted by bovine1

Member since Dec 2004

1366 posts