Weight Of Roof Ballast

1075 2000 lbs.

Weight of roof ballast.

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. 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. A wide range of sizes are available. Ballast pavers are not intended to be used as a plaza deck.

The weight of a roofing system varies depending on components used. Foot traffic should be limited to the occasional pedestrian or maintenance personnel. The weight of truss rafter must be added to calculate the dead load of the roof. Most systems have 10 to 12 psf for ballast.

Don t forget to add all roof assembly materials when calculating total roof weight. 52 5 97 65 kg. Since the ballast is the primary resistance to wind uplift there has to be a lot of ballast installed on the roof. Drawbacks of a ballasted roof system.

After combining the weight of components i e. Roofs with pavers as ballast can be used as outdoor patios. The standard ballast paver is stocked in a natural color and a non slip diamond finish. This includes the roof deck and the supporting structure typically roof trusses and or rafters as well as the roof system itself.

Unlike river gravel which has been known to be hazardous pavers used as ballast or walkways provide a durable safe method of protecting the roof system. The weight provided by the gravel is used to anchor down the roof materials therefore using far fewer fasteners to hold the materials to the decking. Ballast stone traps a lot of dirt making patching difficult. Adds a lot of weight to the roof system typically 10 15 pounds per square feet.

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. 1 lb m ft 2 4 88 kg m 2. Both factors can extend the life of your flat roof. Membrane and stone ballast only 10 75 20 lbs.

Extremely difficult to find a leak in this system since the membrane is well hidden. The following is a list of eligible membranes. Everguard tpo ballasted roof systems the selection of membrane type thickness and attachment is the responsibility of the architect engineer owner or roof consultant. Specifically there are two main reasons to use a ballasted roof system.