on 9/5/2007 3:27 PM cmply said the following:
a friend who happens to do home improvements recommends installing insulation on the underside of the roof. From within
the attic of course. I haven't been able to find a thing that suggests doin so or not. All I've been able to assess is that
by doing so may risk rotting the wood perhaps of the roof. the insulation has vapor barrier paper or batting with paper on the
bottom towards living space.

His thinking is that keep the heat from entering the attic. Id have to aggree, but why is it that I don't see this practiced
in any other houses. I know that installing the insulation on the underside of the roof is an incredibly tedious and difficult thing
?
anyone have comments


The common thought was to insulate the floor of the attic, or the
rafters of the attic, but not both. This was the theory before Central AC.
Now, that central AC is a common feature, the theory is to have a
channel between the soffit vents and a ridge vent, which is a passive
vent, and insulate the rafters, including that passive vent. Do you have
a Central AC in the home and it is mounted in the attic? Then you need
both. One to keep the cold from the living area ceiling in the winter,
and one to keep the hot air from the AC unit in the summer.
Others may disagree, but the dual insulation makes sense.


--

Bill
In Hamptonburgh, NY
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