Home Inspection

Answer: D - All of the above can cause a pitched roof to sag in sections. Frame supports that are not properly spaced can cause a roof to sag in areas between the supports. When there is insufficient bracing of the ridge beam, sagging will eventually occur as the weight of beam pushes down on areas of roof. The roof is vulnerable to any type of structural failure because it is installed after the structure is in place. If there is a shift in the foundation or damage to an outside wall, the roofing is compromised and may begin to sag in areas.