2x4 Non Pressure Treated For Roof Trusses Okay

Non pressure treated wood will smell more natural like the outdoors.

2x4 non pressure treated for roof trusses okay. All that you need to pay attention to is the green tint. While every effort has been made to insure the accuracy of the information presented and special effort has been made to assure that the information reflects the state of the art neither the west coast lumber inspection bureau the american wood council nor its members assume any responsibility for any particular design prepared from this online span calculator. Lastly you can always smell the wood. In many circumstances the wood is also going to contain a marking if it has been pressure treated.

Also available for the android os. Pressure treated wood should be easier to pick up on the smell of the chemicals and other additives used to preserve the wood. Non kd lumber or pressure treated lumber generally has 15 19 moisture content. Although you can accept a lumber moisture content reading of 19 ideally you should aim for moisture content below 15 for kiln dried lumber and less than 17 for any green pressure treated lumber.

That 19 is a critical number as it s a general consensus among the building science experts that above 19 moisture content is the point where mold spores are activated and the rot processes start assuming it stays above 19 for an extended period. Span calculator for wood joists and rafters also available for the android os. I ve just put a plain galvanized shiny no paint or color metal roof on my home addition. The lower the moisture content readings less lumber drying and shrinkage will take place over time and as a result you ll see fewer settling.

Since truss plates made with scc resistant stainless steel are not readily available if at all a vapor barrier is basically required anytime trusses are used over enclosed swimming pools. Usually the pressure treated lumber bears end tags or stamps that identify the chemical used in the treatment process. I was thinking of using treated pine and staining it for the siding.