Short answer: seamless gutters are made on site from one long piece of metal, so there are no joints along the run to leak. Sectional gutters come in 10 or 20 foot pieces that get joined together. Seamless costs more up front and needs a pro to install. Sectional is cheaper and DIY-friendly, but the joints are where leaks start.
Side by side
| Seamless | Sectional | |
|---|---|---|
| How it is made | Formed on a machine at your house, cut to fit each run | Store-bought pieces snapped or sealed together |
| Seams | Only at corners and downspouts | Every 10 to 20 feet |
| Leaks | Fewer places to leak | Joints loosen and drip over time |
| Materials | Aluminum, galvanized steel, Galvalume, copper | Often vinyl or thin aluminum |
| Look | Clean, continuous line, many colors | Visible joints |
| DIY | No, needs a forming machine | Yes |
| Up-front cost | Higher | Lower |
The honest downsides of seamless
- You cannot install it yourself. It takes a gutter machine and a trained crew.
- It costs more up front than a box of vinyl sections. See New Gutter Cost for real ranges.
- A damaged run gets replaced as a run. With sectional, you can swap one piece. With seamless, a badly dented run is usually remade.
Who should choose which
Seamless is the better fit if you plan to stay in your home, want fewer leaks and less upkeep, get heavy rain or snow, or care about curb appeal.
Sectional can make sense for a shed, a garage you rarely think about, a short run you want to handle yourself, or a tight budget on a home you are about to sell.
We only install seamless, because that is what holds up to New England winters. If sectional is the right call for your project, we will tell you.
Next steps
Read 5-Inch vs. 6-Inch Gutters, Repair or Replace? and DIY vs. Hiring a Pro, or call (603) 899-2465 for a free estimate.
More help: All gutter help articles