What is a good roof pitch?
Short answer. A good roof pitch for most homes is between 4/12 and 9/12. That range drains reliably, allows standard shingle installation with single underlayment, and avoids most steep roof labor charges, while still giving a traditional look.
The functional thresholds
- Below 2/12: considered low slope. Asphalt shingles are not permitted; use a membrane such as TPO or modified bitumen, or a metal system rated for low slopes.
- 2/12 to under 4/12: shingles are allowed, but code requires double layer underlayment or equivalent protection because water moves slowly.
- 4/12 to about 7/12: the easiest range to shingle and walk.
- About 8/12 and up: steep. Crews need fall protection and roof jacks, and labor costs rise.
- 12/12: a 45 degree roof. Very steep; common on front gables of many newer Georgia homes.
Good for what you care about
- Lowest cost to build and reroof: 4/12 to 6/12.
- Best drainage under pine needles and leaves: steeper helps debris slide off, though valleys still collect it; see pine needles and leaves on the roof.
- Attic space or bonus rooms: 8/12 and up.
- Metal roofing: standing seam systems can go lower than shingles, often well below 3/12, depending on the panel's rating.
Can you change it?
Changing pitch means reframing, which is a major remodel with engineering and permits. In practice, you choose materials to suit the pitch you have. Architectural vs 3 tab shingles and metal roofing in Georgia cover material choices.