What the purpace of a sub-floor


Old 11-07-06, 12:18 PM
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Location: Wisconsin U.S.A.
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Question What the purpace of a sub-floor

Just put in a door where no door was before. Removed a portion
of the shoe plate (the 2x4 on wall bottom) and seen a sub floor under the 1/2 bath floor, and over the 3/4" partical board floor, do
all rooms have them, and do they cause floor squeeks.
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Old 11-08-06, 04:30 AM
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Subflooring ties together the flooring joists across their grain. Then the final flooring material is laid at a 90 degree angle to the subflooring. This gives lateral pull in both directions to keep the floor tight. It does help in reducing squeaking, since the two grains of the wood pull against each other.
You should build up the flooring in the area where you removed the bottom plate to the level of the finished floor, and install a threshold to span the two floor finishes if they are different (carpet versus tile or hardwood).

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