"Zypher" wrote in message
ink.net...
Some folks wrap a trash bag around the ventilator to do two things. Stop
the heat from leaving the attic in the winter, and stop sideways rain from
entering.

--
Zyp

This is Turtle

Zef , we do this in the south with the plastic bag because we don't have snow
and no moisture problem with ice damns or ice on the roof. You can get away with
it in the south but where you have snow and ice weather, you can't do it.

TURTLE