Lp topnotch 250
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But OSB also takes a longer time to dry out, giving the trapped moisture more time to degrade the material than a quick-drying plywood subfloor. Slower absorption of moisture is ideal for throwing a tarp out over an unprotected subfloor or catching a leak before real damage. OSB absorbs less moisture, but plywood dries out faster and more completely. How the subfloor materials react to water matters during both an open-air construction phase of a house as well as homeownership when a leak or flood might compromise the subfloor.Meanwhile, OSB compacts as many as 50 layers of strands into a single sheet the same thickness as that plywood, ensuring a much denser-and heavier-product throughout. OSB is considered more structurally consistent than plywood. Since a sheet of plywood consists of several large veneers of wood, it’s susceptible to instances of knots and other imperfections (which, if aligned, could create slightly softer spots throughout the material).OSB? Well, each has their own strengths and weaknesses when used as exposed decking or subflooring. Its affordable price aided its growing popularity, and it soon surpassed plywood as builders’ choice in home construction-floors as well as wall and roof sheathing.
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So, unsurprisingly, when OSB came on the scene as an alternative to plywood, detractors were quick to point out its deficiencies. When plywood was developed to replace solid-board sheathing for subfloors and decking, builders were generally reluctant to switch to the new product, which ultimately became the standard for subfloor applications. Plywood is made from glued thin strips of wood veneer (called plies) that are layered at alternating 90-degree angles and placed in a hot press the resulting cross-laminated and layered material is structurally enhanced and resistant to the expansion and contraction that affects solid wood. OSB, on the other hand, consists of 3-inch to 4-inch strands of wood that are also layered and configured in a crossing pattern, then glued and pressed. Though building codes treat both materials equally as “structural panels,” plywood and oriented strand board (OSB) are quite different compositionally.