Standard Building Procedures

There is certainly no shortage of excellent, easy-to-understand and well-illustrated books relating to building and home improvement. If you’re looking for an excellent book about general building, we suggest that you invest in a copy of Construction Principles, Materials and Methods,  Olin, Caroline House. This is considered to be one of the best books available on the subject. Divided into sections by trade, Olin’s book provides the reader with a complete reference to industry standards, specifications and techniques, and it even directs the reader to more information if needed. It’s over 1,000 pages long, and it included extensive illustrations and charts.As far as your drywalled ceiling is concerned, it sounds like you have sagging drywall resulting from faulty anchoring to the ceiling joists, or drywall that has been damaged by water or humidity and can no longer maintain its original profile. Another more possible cause may be ceiling joists that are sagging with age. The book we suggested above contains information that will help you determine what condition exists in your home. In any event, provided the ceiling joists are straight, there is nothing wrong with 1/2 inch drywall attached at 24 inches on center as long as the long dimensions of the drywall is installed perpendicular to the framing.