Before lumber companies began selling OSB, the standard choice for sheathing a roof with a 24-inch rafter spacing was 1/2-inch CDX plywood - the letters CDX indicate that it is construction-grade material intended for exterior applications.

Choosing a ceiling tile supplier depends on several factors. The best supplier should have a wide selection of tiles to choose from, which are available either in stock or quickly after they are ordered. The cost of the tiles and any hardware needed for installation should be within a budgeted price range. The cost of installation and available war

Information on the type of underlayment, flashing, shingles and ventilation being used, and the type of product and workmanship warranties offered. Proof of roofing or contractor's license (if required in your city or state).