Roofing Do You Need To Use Treated Plywood

Pressure treated wood is required whenever you attach framing lumber or furring strips directly to concrete or other exterior masonry walls below grade.

Roofing do you need to use treated plywood.

Rotted plywood cannot support the weight of a roof the way healthy wood can nor can it safely grip the nails put into the roof and keep them held firm. While metal roofing doesn t require plywood underlayment there are circumstances in which you may wish to install plywood to anticipate future roofing needs or to offer additional soundproofing. Correction to this wood product problem can clean your wallet. Read be informed and extract maximum useful life from your plywood project.

Wood for indoor projects should be left as is. These tips cover plywood characteristics and proper installation of plywood. If there is rotten decking the shingles are most likely letting moisture in. Note that this requirement is only for exterior walls as these may wick moisture onto the lumber.

It will support roof. 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. Where to use pressure treated wood while many homeowners wonder if they should use pressure treated wood for a specific project the answer is simple. Wood for any outdoor project should be pressure treated.

Interior walls are within a climate controlled environment and are presumed to be free of moisture. Moisture causes wood to rot and rotten wood absorbs water even more readily than fresh wood. Osb and plywood come in thicknesses ranging from 5 16 to 3 4 inch and the thickness needed for a particular roof depends on several factors including rafter spacing expected load and roof design. Use pressure treated wood in any situation where there s direct contact between the wood and anything that could supply moisture.

Modern metal roofs are expected to last 30 years or longer. The sawdust from pressure treated wood is an irritant to the eyes skin and nose. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. If plywood is not dealt with properly it can swell and create major problems with roofing flooring or siding.