[Shop-talk] Crawl space Vents

[Jimmie Mayfield]

The answer is it probably depends on which part of the country you live 
in.  If you're in the eastern half of Texas where relative humidity 
levels in the summer might hover around 70%, you can make a strong 
argument that the vents should be shut year-round.  The idea that 
allowing cross-airflow to carry moisture out of the building doesn't 
work if the air you're outside air you're drawing in has even higher 
water content.

Decades ago, the belief was that crawlspaces needed to have good 
airflow.  Some people even replaced their vents with small fans.  These 
days the mindset, including that of the Department of Energy, seems to 
fall solidly into the seal-up-your-crawlspace school of thought.

J


On 10/30/18 10:57, Robert Nogueira wrote:
>
> The house attached to my garage is pier and beam with a crawl space.  
> On two ends of the foundation are some vents which have removable 
> covers. The covers have been on for many years,  The crawl space is 
> bone dry.
>
> The question, do need to remove the covers?  If so which season?
>
> Thanks,
>
>  Bob in Texas
>
>
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