06:32AM | 04/06/04
Member Since: 04/05/04
2 lifetime posts
I have a fairly spacious attic in our 8 year old colonial which was constructed with a truss sytem of 2X4's. I would like to put some sort of flooring down for the purpose of storing light to middle weight objects. Is 15/32 plywood ok? Any recommendations on other material to use and how much weight I can store? What does the spread on the 2X4's indicate in terms of weight I can put up there or size of flooring? Thanks!


08:46AM | 04/06/04
Member Since: 09/16/02
250 lifetime posts
I'm not a builder, but I was told one time that a 2x4 attic is not really created for storage. That weight can really add up after a while. If you put a floor in and then light to middle weight boxes you have quite a bit up there. I was also told to put the boxes over a wall which would support it more than just the 2x4's. That's if you can without crawling forever.

I can't help you with actual weight.

Good luck,



03:15PM | 04/07/04
Member Since: 01/28/03
693 lifetime posts
As long as the floor will be used only to hold light boxes and not for walking, 1/2" plywood or OSB will be fine either for 16" or 24" on center framing.

If you plan to walk up there on top of the floor, you will need at least a 3/4" plywood floor.

And remember: The bottom cords of trusses are not deigned to carry any type of real flooring weight so even if you place 3/4" flooring up there the framing may still not be able to adequately bear the weight.


05:49PM | 04/07/04
Member Since: 04/05/04
2 lifetime posts
all Christmas ornament boxes. 5 of them are 5 lbs or less, 2 are 10 lbs and one is 15. Also a couple of (fake) wreaths. I cut a 4x8 3/8 inch sheet of plywood into quarters and attached 2 1x4 (pine) on the sides to keep it slightly above the insulation. the boxes are pretty much the width of the plywood. to be honest, it seems as though the insulation is thick enough to support the weight of the boxes! any comments? Thanks.
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