Pebble Ballast Roof

Single ply roofing materials aren t self adhered nor are they sealed together in any way.

Pebble ballast roof.

Holes mean roof leaks and roof leaks mean call the roofer. Ballasted roofs can be living green roofs brown roofs paved stone or indeed a combination. A homogenous sheet with the addition of a layer of random glass fibres in the middle of its thickness which is designed to virtually eliminate shrinkage and provide the necessary dimensional stability. Gravel in form of round smooth river washed aggregate without broken pieces nominal 16 to 32 mm.

Somebody walking on the roof will undoubtedly step on the ballast and put a hole in the membrane. Ballasted roofs have become more popular as designers and users look to utilise the roof space. The buildup is ballasted with a gravel layer of at least 50 mm and 80 kg m 2. Intended to be used solely as a covered roof membrane restrained against wind uplift forces by the dead weight of ballast.

Simply put a ballasted roof is easy to install and basically guaranteed maintenance work for a roofer. Bur s and ballast roofing systems brs s are topped with rocks. This is partially embedded into a topcoat of asphalt in order that it be protected from the sun s uv rays. The gravel top coat is also extremely resilient to heavy foot traffic and high wind scenarios.

Ballast is commonly used with roofs made of tar and gravel roof alternatives including ethylene propylene diene monomer epdm polyvinyl chloride pvc and thermoplastic polyolefin tpo single ply flat roofs. Despite the positive qualities associated with a ballasted roof system there are some challenges. The ballast is used to keep the roofing system cool and of out of the sun s harmful rays thus keeping energy costs down. Ballasted roof systems are simultaneously a roofer s best friend and arch nemesis.

Once completed the epdm membrane is held in place using one of the following materials as ballast with a minimum weight of 50 kg m. The single ply membrane and other roof components including thermal insulation are loose laid. Roof perimeters and penetrations are flashed in accordance with firestone specifications pdf. The gravel ballast secures the roof waterproofing against wind uplift forces.

These were proving to be a hit with the existing resident seagulls.