Did you know that roofing membranes and AWRB (air and water-resistive barrier) systems have difficulty making sharp 90-degree inside corners?
A cant strip is used to ease the membrane transition between two perpendicular building assemblies. By replacing a sharp inside corner with a 45-degree transition, a cant strip provides a smoother surface for roofing membranes and AWRB systems to maintain continuous protection.
Cant strips create a 45-degree change between adjoining building assemblies, allowing membranes to transition without excessive bending or stress. This helps reduce the potential for wrinkles, bridging, or installation difficulties that may occur at sharp inside corners.
Providing a smooth transition also helps maintain the continuity of the building envelope’s moisture protection.
A cant strip is generally triangular in shape and is manufactured from a variety of materials, including:
Cant strips are available in multiple sizes to suit different project conditions. Common applications include:
These locations benefit from improved membrane installation and continuity at changes in geometry.
The size and material of a cant strip should be selected based on the roofing or waterproofing system and the specific transition being detailed. Compatibility with adjacent membrane materials is important to achieve the intended performance.
Design TOgether with your product manufacturer to select the appropriate cant strip for your project’s building envelope conditions.
A cant strip is a simple but important detailing component that helps create smooth membrane transitions at inside corners. By reducing stress on roofing and waterproofing membranes, cant strips support continuity of the moisture control layer and contribute to long-term building envelope durability.
Ready to streamline Cant Strip detailing into your design? Discover how D.TO enhances your daily design workflows on D.TO’s key features page, or schedule a demo to explore them in more detail!!
