Non Ballasted Roof

For built up roofing the gravel was generally 25 5 inches in diameter. Holes mean roof leaks and roof leaks mean call the roofer. Simply put a ballasted roof is easy to install and basically guaranteed maintenance work for a roofer.

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Section 1609 is title wind loads and contains the wind design speed maps and other pertinent roof wind uplift resistance requirements.

Non ballasted roof.

Non penetrative mechanical fixing this method is where the mounting system sits completely separate atop the waterproofing via substructures that are held onto the roof through mounting plates and welding or bonding overlying membrane sleeves to the uppermost layer of the waterproof covering. No need to anchor and damage the roof membrance. The stones used in ballasted roofing are generally 1 5 2 5 inches in diameter and applied in a thicker layer. Insulation membrane fasteners and adhesive typical installation weight is less than 2 pounds per square foot 10 kg per square meter when 060 thick membrane typically weighing 1 3 pound per square foot or 1 6 kg per square meter is utilized.

Somebody walking on the roof will undoubtedly step on the ballast and put a hole in the membrane. The system is delivered in compact form to save logistics cost unfold at site saves valuable time. Corigy solar non penetrating ballast solar racking is designed for solar mounting on commercial or residential flat roof. Ballasted roof systems are simultaneously a roofer s best friend and arch nemesis.

This section regarding wind resistance of non ballasted roofs has been refined in the 2009 code which includes the word components and narrows requirements to be in accordance with section 1609. The weight of a roofing system varies depending on components used. After combining the weight of components i e. What is the average unit weight of non ballasted epdm roofing systems.

The gravel used in built up roofing what the roofing contractors were used to was not the same as that used in a ballasted roof.