A green roof waterproofing solution from Alumasc delivers a ‘camouflage’ effect for The Decoy Bunker in the rolling hillsides of Monmouthshire.

The original bunker was built in 1941 and was designed as a special decoy target for German bombers. The secluded bunker has now been fully restored using Alumasc’s Derbigum Waterproofing and Blackdown’s Green Roof Systems and is now a unique holiday home.

As part of the design the bunker needed to blend directly into the hillside therefore a highly durable waterproofing system that could provide full protection from the water travelling down from the surrounding landscape was needed. A green roof waterproofing solution that would provide the maximum blending effect was also required to give it the desired ‘camouflage’ effect by using the existing soil and grass from the surrounding landscape. Blackdown Greenroof Drainage Layers, Intensive Substrate and Washed Pebble Ballast was installed to finish the green roof.

With Derbigum being a system that holds 40 year durability certification with the BBA (British Board of Agrément) – a Derbigum Black Anti-Root Built-Up System was the ideal solution. The Derbigum system sits below the green roof and provides a highly reliable waterproofing solution and maximum peace of mind for the future.