Gutter size is about capacity. A 6-inch K-style gutter carries roughly 40 percent more water than a 5-inch. In a climate where most rain arrives in short, heavy storms, capacity matters more than total annual rainfall.
5-inch usually works for
- Single-story homes with moderate roof pitch.
- Roof sections under about 600 to 700 square feet draining to one gutter.
- Runs with a downspout at least every 30 to 40 feet.
6-inch is worth it for
- Two-story homes and tall roof planes.
- Steep roofs, which shed water faster.
- Valleys that pour water into one corner.
- Tile roofs, which shed water quickly.
- Homes that overflowed even when gutters were clean.
Do not forget the downspouts
A big gutter with a small downspout still overflows. 6-inch gutters pair with 3x4 downspouts, and adding a downspout can solve overflow without changing gutter size.
Questions about your home? Call (505) 431-4358 for a free estimate.
