Pebble Ballast Roof

The buildup is ballasted with a gravel layer of at least 50 mm and 80 kg m 2.

Pebble ballast roof.

This is partially embedded into a topcoat of asphalt in order that it be protected from the sun s uv rays. The single ply membrane and other roof components including thermal insulation are loose laid. 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. Simply put a ballasted roof is easy to install and basically guaranteed maintenance work for a roofer.

Somebody walking on the roof will undoubtedly step on the ballast and put a hole in the membrane. The primary concern for sarnafil is ensuring that the roof design meets all the aesthetic requirements whilst providing waterproofing for the roof. Single ply roofing materials aren t self adhered nor are they sealed together in any way. 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.

But the former uses a very thin layer of crushed stone or pea gravel that is not larger than 1 4th inch in diameter. Despite the positive qualities associated with a ballasted roof system there are some challenges. The gravel ballast secures the roof waterproofing against wind uplift forces. Ballasted roof systems are simultaneously a roofer s best friend and arch nemesis.

Ballasted roofs have become more popular as designers and users look to utilise the roof space. Holes mean roof leaks and roof leaks mean call the roofer. These were proving to be a hit with the existing resident seagulls. The gravel top coat is also extremely resilient to heavy foot traffic and high wind scenarios.

Gravel in form of round smooth river washed aggregate without broken pieces nominal 16 to 32 mm. 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 roofs can be living green roofs brown roofs paved stone or indeed a combination. Roof perimeters and penetrations are flashed in accordance with firestone specifications pdf.

Bur s and ballast roofing systems brs s are topped with rocks.