Case Study · Roofing & Waterproofing
North London Liquid Applied Waterproofing
Restec 20/20 liquid applied waterproofing to a detailed North London flat roof, with primer and fleece reinforcement.
Project Overview
Seamless liquid applied waterproofing for a detailed flat roof
This North London flat roof had a lot of detailing, including ridge tile interfaces, eaves courses and roof edge junctions. For that reason, the selected specification was a seamless liquid applied waterproofing system rather than a three layer torch applied felt system.
The works involved stripping out ridge tiles, removing eaves courses, cleaning and drying the flat roof substrate, applying Restec primer, then installing two coats of Restec 20/20 liquid membrane with fleece reinforcement embedded through the system. Tiles and ridge tiles were then reinstated and fixed back into position.
- Flat roof waterproofing
- Existing roof substrate cleaned, dried and prepared
- Restec primer applied to the prepared deck
- Two coat Restec 20/20 liquid membrane system
- Fleece reinforcement embedded through the liquid waterproofing
- Seamless detailing around roof edges, eaves courses and ridge interfaces
- Tiles reinstated and ridge tiles refixed after waterproofing works
Why Liquid Waterproofing
A better fit for roof detail than torch applied felt
The quote allowed for an alternative three layer torch applied felt system, but the roof had enough awkward junctions and detailing that a seamless liquid system was the better technical choice. Liquid applied waterproofing can be formed continuously around details, changes of plane and perimeter junctions without introducing the same lap and joint constraints as sheet systems.
For this project, the important point is not just the product name. It is the build up: prepared substrate, compatible primer, fleece reinforcement, and liquid membrane coats installed to form a continuous waterproofing layer across the roof area and vulnerable details.
During Works
Primer, fleece reinforcement and liquid membrane application
Finished Detail
Seamless liquid applied roof membrane
The finished detail photos show the dark liquid membrane being applied over the reinforced roof surface. The page can be expanded with wider completed roof shots if more after photos are added, but the current set already explains the system: prepared substrate, fleece reinforcement and a continuous liquid waterproofing coat.
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