What is involved in changing the pitch of an existing roof?
Short answer. Changing the pitch of an existing roof follows a construction sequence: design and engineering, permits and HOA approval, tear-off, new framing, sheathing and roofing, then exterior and interior finish work, with inspections along the way. The roofing itself is one of the last and shortest steps.
The sequence
- Define the goal. More attic space, better drainage, or a new look. The goal decides how steep and how much framing changes.
- Design and engineering. An architect or engineer specifies rafters or trusses, wall connections, and any beams, and checks that the walls and foundation can carry the new loads.
- Permits and approvals. Structural roof changes require a building permit in Georgia jurisdictions, and HOAs often review exterior changes. Zoning height limits can also apply. See roofing permits in Georgia.
- Order materials. Engineered trusses often take weeks to build, so they are ordered before demolition starts.
- Demolition and weather protection. Roofing and framing come off in planned sections, with tarps ready for Georgia's pop-up afternoon storms.
- Framing. New trusses or rafters are set, braced, and tied down with the specified hardware, then the framing is inspected.
- Sheathing and roofing. Deck, drip edge, underlayment, leak barrier, flashing, shingles, and ridge ventilation go on. Balanced intake and exhaust matter in the new attic; see roof ventilation basics.
- Exterior finish. New fascia, soffits, gutters, and siding on the taller gable ends.
- Interior and insulation. Ceilings, ducts, and attic insulation. ENERGY STAR suggests about R-49 for most of Georgia and R-60 in the north.
- Final inspections.
Time and disruption
Expect weeks rather than days, with the home partly exposed during framing. That is very different from a standard replacement, which on an average roof usually takes a day.