Maintain a Healthy Roof Structure

Sepa Light allows moisture vapour to pass through the membrane, helping to reduce the risk of condensation and supporting long-term timber durability.

Provide Reliable Secondary Protection

Installed beneath tiles or slates, it acts as a secondary barrier against wind-driven rain, dust, and debris entering the roof space.

Simplify Installation

The lightweight design and manageable roll size make it easy to position, cut, and fix, helping roofers work efficiently across a range of roof types.

Designed for Everyday Roofing Work

• Rolls out smoothly and lies flat
• Cuts cleanly with minimal snagging
• Easy to position over rafters
• Suitable for straightforward lap detailing
• Helps maintain consistent installation across mixed spans

Sepa Light is built for practical use on site, making it a reliable choice for both new build and refurbishment work.

Typical Applications

• Pitched roof constructions
• Tiled and slated roofs
• New build housing
• Re-roofing and refurbishment projects
• Extensions and smaller roofing jobs

Product Specification

• Product: Sepa Light
• Roll size: 1.0m x 45m
• Coverage: 45m²
• Application: Breathable roof underlay

Installation Guidance

Install Sepa Light horizontally over rafters, ensuring correct overlaps in line with roofing standards. Fix securely and install tiles or slates as the primary roof covering. Always follow current building regulations and best practice when installing breathable membranes.

Simple, Reliable Roofing Underlay

Sepa Light provides a straightforward breathable membrane solution for pitched roofs. It is easy to handle, quick to install, and delivers consistent performance where it matters.