Weight Of Roof Ballast

Ballast pavers are not intended to be used as a plaza deck.

Weight of roof ballast.

Foot traffic should be limited to the occasional pedestrian or maintenance personnel. 2 inch smooth river rock 13 lbs ft2 minimum standard paver 22 lbs ft2minimum lightweight interlocking paver specifically documented as approved equal to 2 ballast 10 lbs ft2 minimum photo 2. 52 5 97 65 kg. Epdm roof membrane 60 mil ballasted membrane and stone ballast only 10 75 20 lbs.

After combining the weight of components i e. Extremely difficult to find a leak in this system since the membrane is well hidden. Previous all faqs next. Past work or wind scour has moved river rock around in the more critical corner zone potentially leaving the membrane more vulnerable to uplift damage.

Last updated july 22 2020. A registered professional engineer at the request and expense of the owner or architect shall evaluate the roof structure to ensure it can receive the weight of the ballast paver system. The buildup is ballasted with a gravel layer of at least 50 mm and 80 kg m 2. 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.

Weight of roofing materials. 1075 2000 lbs. 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. Drawbacks of a ballasted roof system adds a lot of weight to the roof system typically 10 15 pounds per square feet.

Ballast stone fractures and gets. Epdm roof membrane 60 mil fully adhered. The gravel ballast secures the roof waterproofing against wind uplift forces. 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.