6-Inch vs 5-Inch Gutters: Which Size Should You Choose?
Gutter sizing is a bit misleading. While 5-inch and 6-inch gutters are only an inch apart in width, their volume differs by about two thirds, because 6-inch gutters are formed from noticeably wider coil. In this video, Gutter Gorilla of Ontario, Canada explains the difference and why they recommend 6-inch gutters for most homes.
5-Inch vs. 6-Inch at a Glance
| 5-inch gutter | 6-inch gutter |
|---|
Approximate size | 5 in wide × 3.5 in tall | 6 in wide × 5 in tall |
Water held per linear foot | About 1.2 gallons | About 2 gallons |
Typical downspout | 2 × 3 inch | 3 × 4 inch |
Best for | Low-slope roofs, smaller roof sections | Steep roofs, metal roofs, heavy rainfall |
Why Capacity Matters for Your Roof
Roofs are designed to shed water quickly, not hold it. If water cannot get off the roof and through the gutters fast enough, it overflows, rots fascia and soffits, and pools around the foundation.
The Problem With 5-Inch Gutters
Because of the roof overhang, Gutter Gorilla notes, a 5-inch gutter often performs more like a 4-inch system. On steep roofs or in heavy rain, water can overshoot the gutter and spill over the front.
A 5-inch gutter can still work on low-slope roofs and smaller roof sections with less water flow, but its performance is limited compared with a larger system.
Why 6-Inch Gutters Perform Better
Six-inch gutters give water more room to enter and flow through the system, reducing overflow. They matter most on:
For the calculation contractors use to decide, based on roof area, pitch, and rainfall intensity, see our guide to sizing gutters by roof area and rainfall.
Is the Upgrade Worth the Cost?
Gutter Gorilla puts the upgrade at about $1 more per linear foot; across the industry it typically runs $1 to $2 per foot, or roughly $200 to $400 on a typical home. That is a small investment compared with the damage poor drainage can cause.
Appearance
Six-inch gutters also look better on most homes, in Gutter Gorilla’s view. They match standard fascia board sizes more proportionally and give a cleaner, more finished look.
Don’t Forget the Downspouts
Gutters are only as good as their downspouts. Standard downspouts are 2 × 3 inches, but Gutter Gorilla recommends upgrading to 3 × 4 inches, which move water faster and keep up with the extra volume of 6-inch gutters. Our guide to understanding gutter downspouts covers placement and parts.
Bigger gutters also need correct pitch to drain; our video on how much slope a gutter needs shows how to check it.
Final Thoughts
Five-inch gutters can work in some situations, but 6-inch gutters offer better performance, a more proportional look, and long-term protection. For most homes, Gutter Gorilla considers upgrading to 6-inch the smarter choice. Our complete guide to gutters covers materials and costs.
Want quotes on 6-inch gutters? Home Upgrade Pros connects homeowners with licensed gutter contractors for free, no-obligation estimates, or call (725) 278-6174.
Frequently Asked Questions
Are 6-inch gutters really better than 5-inch?
For most homes, yes. They hold about 2 gallons per foot versus 1.2, reduce overflow, and perform better in heavy rain.
Can I use 5-inch gutters on my home?
Yes, but they are best suited to low-slope roofs or smaller roof sections with less runoff.
Do 6-inch gutters cost a lot more?
No. The upgrade usually adds about $1 to $2 per linear foot, or roughly $200 to $400 on a typical home.
What size downspouts should I use?
Three-by-four-inch downspouts move more water and are recommended with 6-inch gutters.
Do bigger gutters look better?
Often, yes. Six-inch gutters look more proportional on most fascia boards.
