- Q.How do you vent a crawlspace
under a house on a sloping site? On a recent job, the
uphill side was covered with a patio and the customer
wouldn’t accept window wells in the patio.
Will this side get enough ventilation with conventional
vents along the pony walls on the downhill
side?
A.As long as the
crawlspace is reasonably dry, vents on only three
sides should be adequate to vent the crawlspace. If
there is good drainage (the slope would indicate
that this is likely), and a plastic ground cover is
installed, there shouldn’t be much
problem. But while vents on all sides may not be
needed, don’t forget that it is much
easier to install them during construction than to
cut them in later, if the need ever
arises.