Mastic / Norandex
Seamless K-Style & Box Gutters
The most common gutter profile in Idaho, formed to your exact roofline with no seams.
K-style gutters have a finished, crown molding look that works with almost any home style, and are efficient at moving water to your downspouts. We also offer box gutters, a cleaner, more modern profile popular on commercial buildings and increasingly on residential homes.
Why This Product Is the Best Choice
Engineered for durability. Outperforms alternatives across the factors that matter most.
Formed On Site
Each gutter run is roll formed to the exact length of your home, eliminating the mid-run seams where sectional gutters typically fail first.
5" and 6" Profiles
Sized correctly using the SMACNA calculator and local rain data, not a one-size-fits-all guess.
Box Gutter Option
A cleaner, modern profile that pairs well with round downspouts, popular on commercial buildings and increasingly on residential homes.
K-style gets its name from SMACNA, the Sheet Metal and Air Conditioning Contractors' National Association, which assigned the letter "K" to this profile when cataloging gutter shapes decades ago. It stuck, and today it is installed on the vast majority of homes in Idaho.
We fabricate every K-style and box gutter on site with a roll forming machine, so each run is a single seamless piece rather than sections joined together. That single detail is the biggest reason seamless gutters leak less than the sectional gutters sold at most hardware stores.
Available Profiles & Styles
5" K-Style
Sufficient for the majority of Idaho homes.
6" K-Style
Used on larger roofs, steeper pitches, and homes with higher rain volume.
5" / 6" Box Gutter
A modern, flat profile often paired with round downspouts.
Technical Specifications
- Material
- Aluminum (standard) or Steel
- Standard Gauge
- .027" (upgrade to .032" available)
- Colors
- 25+ factory baked-on finishes