Q:I want to add venting to the crawlspace of an old house. Are there certain building code guidelines I need to follow?
A:Building code restrictions are enforced by municipalities, so you should call your local inspector’s office to determine guidelines for your area. In general, however, crawlspaces require one vent within 3 feet of each corner. The opening should be covered with 1/4-in. screen or grate. The minimum ventilation area for the crawlspace should be 1 square foot per 150 square feet of crawlspace area. Note that these rules apply to unfinished crawlspaces. No extra ventilation should be necessary for crawlspaces sealed with a vapor retarder, insulated walls, and conditioned air space with mechanical ventilation.
Q:What are the advantages of KDAT lumber?
A:Wood labeled KDAT is “Kiln Dried After Treatment.” This process provides the benefits of composite material with the natural beauty and character of real wood. Dried to its original moisture content in a controlled environment, the wood dries evenly to minimize the natural tendency of freshly treated lumber to shrink, cup or warp. This high-quality lumber is the top choice for outdoor construction. Following pressure treatment, KDAT products are placed in a large oven, or kiln, where the excess moisture is removed. The stiffer and more dimensionally stable product reduces after-installation issues that occur when regular pressure-treat- ed wood dries naturally. It also means your KDAT lumber should be kept elevated, covered and completely dry