Kiln drying is an industrial unit operation used to accelerate the drying of wood. A wood drying kiln is an enclosed space where air speed, temperature and humidity are controlled. Natural air drying of wood can take weeks, while a wood drying kiln can complete the process in less than a day.
Kiln dried timber has a moisture content between 10 and 15%. The benefit of kiln drying the timber is that it is dried in a controlled environment, has rigorous testing, and is extremely quick giving a higher quality end product. Bugs and insects are also killed during the drying process. Therefore it can be more cost effective and less likely to have distortion, staining or drying stresses (i.e. warping or bowing).
SYP Lumber originates in the United States of America. The Heartwood is reddish brown, sapwood is yellowish white. Loblolly Pine works fairly well with most tools, and it glues and finishes well. Exterior uses are construction lumber, stringers, roof trusses, poles, joists, piles; as well as interior applications such as subflooring and sheathng. Common size available are 2x6, 2x8 and 2x10.
European Softwood Lumber of Spruce and Sylvetris Pine are procured from various parts of EU. In Pine Heartwood is light reddish brown, demarcated sapwood is pale yellow to nearly white. Spruce typically is creamy white, with a hint of yellow and/or red. Both is commonly used for making Utility poles, posts, boxes/crates, flooring, paper (pulpwood), and construction lumber.
SPF Lumber as commonly called is a mix of Spruce-Pine-Fir that originates in Canada. Logs are cut in the most modern sawmilling facilities with the quality parameters set by the government thus ensuring standard quality specifications of the product across the country. It is available in various sizes like 2x6, 2x8, 2x10. Uses of SPF Lumber is mainly for construction, manufacturing of doors and framing