On 12/8/2004 12:17 PM US(ET), Scot took fingers to keys, and typed the
Do it the right way. Stapled between joists. What if you have to get
above the ceiling to route new wire, cable, pipe, or to repair
something, etc. It will be harder pushing the tiles around while
insulation is laying on them, and then you have to pull the insulation
down along the path of the wire, pipe, etc.
stapling between the joists will not work well in this situation. the roof
joists are at least 10 feet higher than where the ceiling will be. that
being said, cold air from the rest of the attic would just come across the
I'm just doing the same thing.
At HD, they have R13 23.5" wide faced insulation in bundles of precuts at
94". These are pretty handy
because one cut in the middle gives two pieces, the width is OK, and the
facing allows them to slide across
the ceiling tile nicely.
These install very quickly, but they are slightly undersized, so the
adjacent batts aren't squeezed into
each other. I was willing to give up some R value for easier install and
also later if you need to lift a
Also, you can order precut 2 X 4 from specialty insulation companies (more
$, of course) in R13 up to R30.
The really thick stuff is a bit too heavy for cheaper ceiling tile, though.
They would probably sag after a while.
These are full dimension, so if you lift a tile later for access, you may
not be able to get the insulation
back in place.
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