Roofing Do You Need To Use Treated Plywood

The sawdust from pressure treated wood is an irritant to the eyes skin and nose.

Roofing do you need to use treated plywood.

These tips cover plywood characteristics and proper installation of plywood. Wood for indoor projects should be left as is. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. Moisture causes wood to rot and rotten wood absorbs water even more readily than fresh wood.

Perry mastrovito design pics getty images. 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. 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. Interior walls are within a climate controlled environment and are presumed to be free of moisture.

Wood for any outdoor project should be pressure treated. Modern metal roofs are expected to last 30 years or longer. Correction to this wood product problem can clean your wallet. Read be informed and extract maximum useful life from your plywood project.

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. If plywood is not dealt with properly it can swell and create major problems with roofing flooring or siding. Note that this requirement is only for exterior walls as these may wick moisture onto the lumber. 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.

If there is rotten decking the shingles are most likely letting moisture in. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. Pressure treated wood is required whenever you attach framing lumber or furring strips directly to concrete or other exterior masonry walls below grade. 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.