Pebble Ballast Roof

Intended to be used solely as a covered roof membrane restrained against wind uplift forces by the dead weight of ballast.

Pebble ballast roof.

The gravel top coat is also extremely resilient to heavy foot traffic and high wind scenarios. Holes mean roof leaks and roof leaks mean call the roofer. Gravel in form of round smooth river washed aggregate without broken pieces nominal 16 to 32 mm. The single ply membrane and other roof components including thermal insulation are loose laid.

Ballasted roof systems are simultaneously a roofer s best friend and arch nemesis. 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. Simply put a ballasted roof is easy to install and basically guaranteed maintenance work for a roofer. Ballasted roofs have become more popular as designers and users look to utilise the roof space.

The primary concern for sarnafil is ensuring that the roof design meets all the aesthetic requirements whilst providing waterproofing for the roof. The buildup is ballasted with a gravel layer of at least 50 mm and 80 kg m 2. Roof perimeters and penetrations are flashed in accordance with firestone specifications pdf. Single ply roofing materials aren t self adhered nor are they sealed together in any way.

The gravel ballast secures the roof waterproofing against wind uplift forces. Ballasted roofs can be living green roofs brown roofs paved stone or indeed a combination. 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. Despite the positive qualities associated with a ballasted roof system there are some challenges.

This is partially embedded into a topcoat of asphalt in order that it be protected from the sun s uv rays. The ballast is used to keep the roofing system cool and of out of the sun s harmful rays thus keeping energy costs down. Bur s and ballast roofing systems brs s are topped with rocks. These were proving to be a hit with the existing resident seagulls.

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.