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Sedum Roll-Out Green Roof System on Garden Outhouse, Ramsbury, Wiltshire

OVERVIEW

Installed in April 2025, this 180m² green roof project in Ramsbury, Wiltshire, features Wallbarn’s roll-out sedum system installed on a newly constructed residential garden outhouse. The client was looking for a natural, biodiverse finish that would blend effortlessly into the rural setting and provide long-term ecological value.

The full build-up comprised a protection fleece laid over the waterproofing membrane, followed by a drainage/reservoir board to manage water retention and discharge. A geotextile filter layer was then installed to prevent fine particles from migrating, topped with a specialist extensive substrate to support plant growth. Finally, Wallbarn’s pre-cultivated sedum blanket was rolled out as the top layer, offering instant green coverage and aesthetic impact.

Lightweight and easy to install, the system was ideally suited to the timber-framed structure. In addition to visual appeal, it now supports pollinators and wildlife, delivers rainwater attenuation, and contributes to the building’s thermal performance—all with minimal ongoing maintenance.

Products featured in this case study

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Extensive Sedum Green Roof - Rollout Blanket System - Extensive Sedum Green Roof System

Extensive Sedum Green Roof - Rollout Blanket System - Extensive Sedum Green Roof System

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