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.......... if anyone could tell me what the point of putting a glorified sponge on top of the subfloor was in the first place .........
Iíve been researching underlayment for hardwood flooring on a slab. I was hoping to use OSB as it is so much cheaper than plywood. The only thing the oak flooring manufactures association will recommend is 3/4" plywood for its nail holding ability.In my last house I used 3/4" plywood for the sub floor with oak strip flooring. In the kitchen and bathrooms on top of the ply I used something called underlayment. Itís a thin plywood to provide a smooth base for the linoleum tile...I suppose your mdf served a similar purpose.There are tools to cut close to your wall...check out the rental places.18" wide flooring sounds most interesting...and way to risky for me. Take pictures and let us know how you progress.
Up here in MN if we put down 18" wide flooring we'd end up with a 1/2" crack in the winter and no crack in the summer due to wood movement. Steve
Are you sure the second layer go under the walls? When we uses to add a second layer it was alway after the house was framed and we put it down before triming.
I almost always run my flooring perpendicular to the floor joists. I snap lines on the floor where the joists are, and put my nails along those lines, through the sub floor and into the joists. the only nails that are into the plywood only are those at the ends of boards that don't fall on a joist.
I'd also be interested if anyone could tell me what the point of putting a glorified sponge on top of the subfloor was in the first place .
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