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Old 11-14-2010, 01:52 PM   #1
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insulating an attic with t&g floor in place

I have a 1400sf walk up attic with ZERO insulation between 2x10 joists.
The tounge and groove flooring has been in place since 1925, the fastners are tougher than Mike Ditka.
How do I get insulation under the flooring without having to rip it all up?
Anyone been through this?
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Old 11-14-2010, 06:28 PM   #2
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since the floor is (should be) laid perpendicular to the joists, you could just pull up a few boards in the attic, and then blow cellulose into the cavities. pulling up some boards in the middle and around the edges should give you sufficient access to make sure that you don't end up with any voids in your insulation.
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Old 11-15-2010, 05:46 PM   #3
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yes, what the other guy said.

if the boards are nailed through the tongues, here's what i would do:

take a skilsaw and set the depth of cut to the board thickness. then rip a line straight down the middle of the board. the "groove" half will lift right out, and the tongue half will pry out easily with a bar/hammer. then they both can be nicely reinstalled after.

if the nails are through the face, i would take a cat's paw to the nails on the groove side, and do the same method as above.

good luck.
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Old 11-16-2010, 09:18 PM   #4
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a less messy, but more costly option may be styrofoam on top of the planks and then put 3/4" plywood overtop of the styrofoam so you can still use the space. "Blow in" insulation sounds good too.
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