How Do You Build A Roof Over A Porch?
A roof structure over a porch, often referred to as a porch canopy, is a cantilevered roof system that ties into the existing building and roof, with supporting posts at the outer line of the canopy and a bearing system that supports the canopy roof rafters. Begin by removing any existing roof overhang rafters or other that may impede the attachment of the canopy to the building. Remove these to flush with the exterior of the building and to the desired width of the canopy area. Support posts at the outer edge of the canopy will be anchored into a concrete base, which may be either the porch surface or 12″ diameter concrete footings. Measure from the face of the building to the desired length of the canopy and make a perpendicular mark on the surface using a chalk line or wood stakes and a string line. Deduct for the desired roof overhang on each side and mark for the (2) post locations with a marker or additional stakes. Check the configuration for square and consistent dimensions. To
