I am thinking of flooring my attic, with the intention of using it as a storage area for now and possibly insulating it
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KMS Woodworks on Dec 02, 2011I'd go with T & G ply...this is what is used for subfloors..Helpful Reply
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Dennis B on Dec 02, 2011I'd use 1/2 - 3/4" exterior plywood. If need be it could be ripped into strips to fit through openings to put it in.Helpful Reply
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Woodbridge Environmental Tiptophouse.com on Dec 02, 2011We use OSB all the time in attics when we insulate. We stack 2x6 at right angles to the existing floor joists and place them at 24 inch centers. And as Dennis said we cut them in down as needed to fit. We do however use screws not nails to fasten. primary reason is the impact that the hammer has on the ceiling below can cause all sorts of nail popping which then requires repairs and paint. Using screws is a non impact way of fastening them down. Particle board is way to heavy and is not considered as a structural material for any type of span. Stick with OSB or plywood. What ever you can get for the best price.Helpful Reply
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MCL on Dec 08, 2011Make sure the structure, i.e. truss bottom chord or ceiling joists, can take a storage load. Codes vary, but it's somewhere around 80 lbs./SF. Personally I agree with KMS and would use 3/4" T&G plywood, especially if you want to finish it with another flooring later.Helpful Reply
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Glkirk Builders Inc. on Dec 09, 2011MLC has the prelims down. It is very important to be sure your joists are up to code. Now is the time to upgrade. Code says you need 3/4" . continious material. IE 3/4" T&G plywood or 3/4" T&G osb.Helpful Reply
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Its Really Concrete, Inc. on Dec 09, 2011our garage is truss framed onsite 16" o/c - 2 x 6 bottom & 2 x 4's up the angles,,, the floor is 1/2 ply screwed down,,, heavy enough for storing the Christmas stuff, daughter's college banners, & spare luggage - tnx for the code update inf - however how would 1 upgrade joists to carry addl deadload of 3/4" t&g ply - sistering ? hometalk scores for me again !Helpful Reply
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Tidewater Insulators on Dec 09, 2011Make sure you leave enough room for insulation under the flooring. Until you finish the room off, this could be a major area where you could loss heating through the ceiling. Compressing the insulation lowers the R-value and effectiveness.Helpful Reply
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