Pebble Ballast Roof

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.

Pebble ballast roof.

The ballast is used to keep the roofing system cool and of out of the sun s harmful rays thus keeping energy costs down. Single ply roofing materials aren t self adhered nor are they sealed together in any way. The buildup is ballasted with a gravel layer of at least 50 mm and 80 kg m 2. Somebody walking on the roof will undoubtedly step on the ballast and put a hole in the membrane.

Simply put a ballasted roof is easy to install and basically guaranteed maintenance work for a roofer. These were proving to be a hit with the existing resident seagulls. Ballasted roofs can be living green roofs brown roofs paved stone or indeed a combination. Ballasted roof systems are simultaneously a roofer s best friend and arch nemesis.

The gravel ballast secures the roof waterproofing against wind uplift forces. 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. The primary concern for sarnafil is ensuring that the roof design meets all the aesthetic requirements whilst providing waterproofing for the roof. Intended to be used solely as a covered roof membrane restrained against wind uplift forces by the dead weight of ballast.

Despite the positive qualities associated with a ballasted roof system there are some challenges. 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. Gravel in form of round smooth river washed aggregate without broken pieces nominal 16 to 32 mm.

Roof perimeters and penetrations are flashed in accordance with firestone specifications pdf. Ballasted roofs have become more popular as designers and users look to utilise the roof space. The single ply membrane and other roof components including thermal insulation are loose laid. Seagulls causing considerable damage to pebble ballast roofing the royal cornwall hospital has recently had a new health wellbeing centre built with a rooftop that housed decorative pebbles known as ballast or pebble ballast roofing.

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.