Weight Of Ballasted Roof

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Weight of ballasted roof.

52 5 97 65 kg. 1075 2000 lbs. Check out eng tips forum s policies here. The weight of roofing constructions above the truss rafter may be estimated with the calculator below.

Extremely difficult to find a leak in this system since the membrane is well hidden. The weight on a ballasted roof can be from 10 to 25 pounds per square foot meaning the substructure must be designed specifically to carry more weight than other roofing systems. Epdm roof membrane 60 mil fully adhered. Roofs with pavers as ballast can be used as outdoor patios.

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 buildup is ballasted with a gravel layer of at least 50 mm and 80 kg m 2. The single ply membrane and other roof components including thermal insulation are loose laid. Last updated july 22 2020.

In the case of ballasted roofs ballast will consist of rounded gravel 20 40 mm diameter at a minimum rate of 80 kg per square metre and 50 mm thickness or pre cast hydraulically pressed concrete pavers of 50 mm minimum thickness and approximately 120kg m2. Perimeter attachment shall be designed to withstand a minimum load of 100 pounds per linear foot. Gravel ballasted roofs with sikaplan or sarnafil single ply membranes are conventionally installed. Multi story buildings and perimeters will often require more than 10 psf ballast for.

It can also be a bit challenging to find a leak with a ballasted roof system and because the stones tend to collect a lot of dirt patching it can be a bit difficult. Roof perimeters and penetrations are flashed in accordance with firestone specifications pdf. After combining the weight of components i e. Lightweight interlocking pavers with integral cementitious coating the panels shall be interlocking and weigh a minimum of 4 0 psf.

Gravel in form of round smooth river washed aggregate without broken pieces nominal 16 to 32 mm. None asphalt roll roofing 1 1 lb m ft 2 5 4 kg m 2 asphalt shingle or asphalt fiberglass composite shingle 2 7 lb m ft 2 13 2 kg m 2. Ballasted roof dead load jike structural 19 jun 14 22 09. Epdm roof membrane 60 mil ballasted membrane and stone ballast only 10 75 20 lbs.

Other interlocking ballast pavers are available as well. Slope design shall not exceed 2 inches in 12 inches. 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.