What is the primary difference between conventional framed roofed systems and a truss roof?
Answer Hi Randy, a conventional framed roof has large joists used for rafters that span the distance because of the size of the individual wood on its own, i.e. 2×12, 2×10. A truss roof system uses smaller lumber and is engineered to transfer the roof load equally from the peak to the outside wall. Engineered trusses span greater distances and are more stable in how they handle weight. Truss joists that are conventionally framed may eventually begin to sag and lose support over time due to the gravitational forces exerted on them. When a truss is “engineered” it doesn’t use a biohazardous wood, it merely means that the structure of the truss is calculated by an engineer to maximize the load bearing quality of the wood used. Nowadays most roof coverings are not hazardous so to speak. In other words, no asbestos is used any longer. Asphalt shingles are reinforced with fiberglass today which is not considered a hazardous material. The most hazardous material used in roofing today is proba
