This article is part of our series on How to Install Hardwood Floors. While preparing to lay 1100 square feet of hardwood flooring, we discovered significant variation in the OSB subfloor that will serve as the nailing surface for the hardwoods. This article provides detailed instructions for leveling a subfloor based on our project. Project Overview: Uneven OSB Subfloor The subfloor beneath our first floor is 5/8' oriented strand board (OSB) laid over 2 x 10 joists that are spaced 16 inches…
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