K Gutter System

Colored Aluminum K-Style Gutter and Downpipe System
In the late 1950s, the adoption of continuous roll-forming technology encouraged the development and production of a new generation of thin-gauge metal gutter systems. With its distinctive double-curved profile, long service life and straightforward installation, the aluminum K-style gutter and downpipe system became widely used throughout the United States and Canada.
According to the original product information, more than 90% of American homes use K-style aluminum gutter and downpipe systems.
Typical Applications
- 5-inch K-style system: Primarily used for houses, villas and small commercial or public buildings.
- 6- and 7-inch K-style systems: Primarily used for larger residences and projects requiring greater drainage capacity.
- Mid-rise apartment buildings and medium-sized commercial or public buildings

Reference specification: AAMA 1405.1-76, Voluntary Specification for Aluminum Gutter and Downspout Systems.

Distinctive Multi-Curve Profile
The gutter uses the K-Snap multi-curve profile widely seen in North America, while the downpipe features a refined rectangular corrugated design.

Cost-Effective System Configuration
Load-bearing components are manufactured from metal to improve structural reliability. A simplified range of components helps reduce the overall system cost while maintaining dependable performance.

Straightforward Installation
The system uses fewer components, making installation easier to learn and execute. Connections between components are simple and reliable, with the best results achieved using the recommended installation tools.

Reference Drainage Capacity

Under typical conditions:

A 5-inch gutter can serve approximately 800 ft² (74 m²) of roof area.
A 6- or 7-inch gutter can serve more than 1,000 ft² (93 m²) of roof area.
A 2 × 3-inch downpipe can serve approximately 600 ft² (56 m²) of roof area.

Actual system sizing must be confirmed according to the effective roof drainage area, roof pitch, local rainfall intensity, outlet arrangement and applicable design standards.

Recommended Installation Gradient

When installing a K-style gutter, provide a fall of approximately 1 inch for every 40 feet toward the downpipe outlet—equivalent to a gradient of approximately 0.2%. This helps to:

Maintain a visually coordinated relationship between the gutter and the building façade.
Direct rainwater efficiently toward the outlet and reduce standing water at corners and other low points.

Downspout Crimping Tool
Suitable for thin-wall downspouts in a range of sizes.

Aluminum Gutter
Pre-coated finish with concealed internal hangers

Downspout Elbow
Pre-coated finish with a 75-degree bend.

North American K-Style

Popular throughout North America for decades, the K-style gutter remains a preferred choice for both residential and commercial buildings.

Metal Gutter and Downpipe Systems

Choose a metal gutter and downpipe system that complements your building’s architectural style.

European Half-Round

Widely used in European architecture, half-round gutters are typically paired with round downpipes to create a clean, classic appearance.

Custom Gutter Systems

Designed around your architectural requirements and visual preferences, our custom systems integrate closely with the roof edge for effective drainage and a cohesive exterior finish.