On Sep 5, 6:49 pm, "Joseph Meehan" wrote:
In addition to the comments made I will add that in general it is better
to insulate the floor and vent the attic to help keep the roof cooler. If
you insulate right under the roof, the roof will get hotter and the extra
heat will shorten its life. Also the roof is a larger area so for the same
money you can insulate the floor to a higher R value and have a smaller
exposed area of transfer.

With HVAC equipment in the attic, I suggest it is best to spend your
insulation budget on insulating the equipment and air handling equipment
rather than the whole attic.

--
Joseph Meehan


Normal practice in an attic not used as living space is to insulate
the attic floor, between the joists to insulate the living space from
the unconditioned attic space.

If you want additional help in keeping heat out, the appropriate
technique for the underside of the roof sheathing is a radiant
barrier. Perhaps that is what your friend was talking about. But
this is a foil type product, not traditonal insulation.






Dia 's Muire duit

"cmply" wrote in message

...



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- Hide quoted text -

- Show quoted text -