What Is The Difference Between Kiln Dried And Pressure Treated Wood
This weight difference is then used to calculate the wood s original moisture content.
What is the difference between kiln dried and pressure treated wood. From our research there are many conflicting stories online forums posts articles etc about whether or not this can be used for exterior projects such as decks and fences. Prowood kiln dried after treatment kdat has all the weather beating durability you demand from treated wood yet it s dried in a kiln which reduces shrinking and warping. Once the wood sample s weight stops changing its weight is compared to what it was before the drying process began. It kills any insects that could be lurking in the wood.
The wood sample being tested is dried in a special oven or kiln and its weight periodically checked. Another added benefit since the wood is heated usually around 125 degrees. Unlike pressure treated lumber untreated or heat treated wood contains no questionable chemical compounds that may leach into the soil within the bed. If the lumber is dried rapidly of course it would split crack and warp.
The wood shown in this picture is a no 2 grade kd ht kiln dried heat treated s p f spruce pine fir. 6x6s for support posts and plywood. Kiln drying brings the moisture content down to around 10 16 depending on the wood species and dimensions. It s no wonder why most if not all framing lumber for houses is kiln dried.
Kiln dryed lumber is as the term states lumber that is dried in a kiln slowly over a period of time to approximately 18. Species sizes of pressure treated wood. Prowood kiln dried kdat kiln dried for stability and lower weight. Wood is one of the most common material for use in raised beds.
2x8s 2x10s and 2x12s for joists stair stringers and beams. Treated wood is generally available as dimensional stock in 2x4s 2x6s 4x4s and 2x2s for rail components. 2 or better is the grade supplied by lumber companies. The predominant species of treated wood is a regionally available softwood.
It meets code and there is no noticable difference for deck applications. Generally 1 only is used when specified by a structural engineer. Kiln dried pressure treated or green lumber for fencing 9 may 2016 wood fence if you are planning on investing in a houston wood fence you should know the difference between pressure treated green lumber and kiln dried wood. You ll not only find it s easy to cut but you can stain or seal it immediately.