Pressure Treated Wood Roof

Whether pressure treated lumber is appropriate for trusses depends on the preservative used in the treatment process.

Pressure treated wood roof.

Chris yerkes a cedar shingle installer certified by the cedar shake and shingle bureau cssb and owner of cedarworks in brewster mass responds. This table is intended to give you an idea as to what pressure treated wood might weigh at its heaviest so the values given use the heaviest wood species southern yellow pine longleaf commonly used to produce pressure treated lumber with the highest amount of water commonly added to the wood during treatment close to four gallons or about 32 lbs per cubic foot immediately after. Todd miller isaiah industries inc. In my 13 plus years installing cedar roofs i have been asked to install regular.

The sawdust from pressure treated wood is an irritant to the eyes skin and nose. While naturally resistant to rot and decay western red cedar shingles and shakes that have been treated with chromated copper arsenate cca will add years to the life of your roof or siding. Wood for indoor projects should be left as is. What are the pros and cons to using these shingles vs.

Interior walls are within a climate controlled environment and are presumed to be free of moisture. Invented in the early 1930 s cca treatments protect wood against insect attack and fungal decay and is expected give life to the wood in the excess of forty years. Pressure treated wood is required whenever you attach framing lumber or furring strips directly to concrete or other exterior masonry walls below grade. If you go with battens you will need to go with raw untreated lumber or painted lumber.

There are three broad classes of preservatives used for the pressure treatment of wood. Wood for any outdoor project should be pressure treated. Perry mastrovito design pics getty images. Note that this requirement is only for exterior walls as these may wick moisture onto the lumber.

Return to forum. Some low level leaching the chemical preservative leaking from the wood can also be a problem with indoor projects. Can one use pressure treated lumber in metal plate connected truss construction. If so are special plates or coatings required.