Using Pressure Treated Plywood For Roof

Treatment chemicals include chromated copper arsenate cca ammoniacal copper quat acq copper azole ca and safest of all borates.

Using pressure treated plywood for roof.

Wood for any outdoor project should be pressure treated. Pressure treated plywood usually has a greenish hue and a slightly oily surface. Where to use pressure treated wood. Pressure treated wood already has a built in water resistance.

Wood for indoor projects should be left as is. If you are constructing a roof deck you will need to be concerned with the amount of water that gets on the wood. The metal present in the treatment chemical copper is dissimilar to the metal roofing steel. Manufacturers produce it by infusing regular plywood with chemicals under pressure to give it added resistance to mold and mildew.

I would be concerned that galvanic corrosion could degrade the metal roofing or fasteners. One of the nice things about plywood is the variety of options you can buy. Interior walls are within a climate controlled environment and are presumed to be free of moisture. Plywood sheathing is ideal for residential and light plywood sheathing is ideal for residential and light construction and every piece meets the highest grading standards for strength and appearance.

It adds proven performance and durability to new homes room additions and renovations. The sawdust from pressure treated wood is an irritant to the eyes skin and nose. Plywood sheathing delivers outstanding rigidity strength and versatility and is an excellent choice for. This means posts in contact or buried underground obviously but it also includes any lumber touching concrete or masonry since it s porous and wicks water like a sponge.

There are pressure treated grades marine grades that can be used in water fine hardwood options for finish work and cabinetry pre finished panels or simple down and dirty 1 2 cdx plywood. Galvanic corrosion occurs when electrons move away from an anode toward a cathode. Use pressure treated wood in any situation where there s direct contact between the wood and anything that could supply moisture. The bottom line is that there is a plywood for almost every application.

While many homeowners wonder if they should use pressure treated wood for a specific project the answer is simple. Pressure treated lumber is one of the best options that you can use for a roof deck because of its extreme durability.