Lumber FAQ

OSB Board vs MDF Board vs Plywood – Isn't it all the same thing?

OSB Board OSB, oriented strand board, is an engineered wood particle board that is formed by adding adhesives and then compressing the wood flakes together. MDF MDF, medium density fiberboard, is an engineered wood product that is created by the breaking down of wood...
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Stud Vs. 2 x 4. What's the difference?

A stud is a 2 x 4 that has been cut down to 92 5/8". It is then the perfect height to build an 8-foot wall frame with the top and bottom plates. A 2 x 4 8 foot board is usually slightly over 8 feet so it can be trimmed to the required length

Why is my 2 x 4 not 2 inches by 4 inches?

Lumber manufacturers typically cut a tree into the various standard types of dimensional lumber very shortly after the tree is felled. At this point, the 2 x 4 is actually 2 inches x 4 inches, a 2 x 10 is actually 2 inches x 10 inches, etc. But then the newly-sawn (but soaking wet)...
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What do all of those letters even mean?

MDF Medium-density fibreboard (MDF) is an engineered wood product made by breaking down hardwood or softwood residuals into wood fibres and combining it with wax and a resin binder and forming panels by applying high temperature and pressure. MDF is generally denser...
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What are Pressure Treated and ACQ lumber?

Pressure Treated Wood Pressure-treated wood is softwood lumber, typically southern yellow pine, that's been chemically treated to resist rot, decay and termites. The boards are rolled into giant pressurized tanks where chemical preservatives are forced deep...
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What does SPF mean?

Spruce-Pine-Fir (SPF)This group of western Canadian interior species includes Engelmann spruce, white spruce, hybrid white spruce, lodgepole pine, and subalpine fir. The colouring of this group ranges from white to pale yellow. These grades are light in weight, work easily, take...
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