Roof Ballast Depth

Drawbacks of a ballasted roof system.

Roof ballast depth.

The installation can be done in different temperature and weather conditions. 1 5 m perimeter with 6 152 mm bead spacing is required. Large sheets of the roof membrane can be efficiently quickly installed at one time. 9 1 m exposure b shall apply where the ground surface roughness as defined by surface roughness b prevails in the upwind direction for a distance greater than 1 500 ft.

Ballast stone traps a lot of dirt making patching difficult. Somebody walking on the roof will undoubtedly step on the ballast and put a hole in the membrane. Finally all the ballast stone and or pavers are laid down across the roof system. Adds a lot of weight to the roof system typically 10 15 pounds per square feet.

Epdm roof membrane 60 mil ballasted membrane and stone ballast only 10 75 20 lbs. Epdm roof membrane 90 mil fully adhered membrane only 0 56 lbs. Epdm roof membrane 60 mil fully adhered membrane only 0 47 lbs. Reach the optimum solar panel angle.

The stones used in ballasted roofing are generally 1 5 2 5 inches in diameter and applied in a thicker layer. Simply put a ballasted roof is easy to install and basically guaranteed maintenance work for a roofer. For buildings up to 34 feet 10 m in height or less and 200 feet 60 m wide or less a 5 ft. For buildings from 34 10 m to 100 feet 30 m in height and 200 60 m wide or less a 10 ft.

Holes mean roof leaks and roof leaks mean call the roofer. Roof height of less than or equal to 30 ft. Most systems have 10 to 12 psf for ballast. A roof system should be selected that optimally responds to an integration of the project s requirements and the system selection criteria.

52 5 97 65 kg. 9 1 m exposure b shall apply. The ideal ballast to use for this system is either concrete blocks or lintels with a minimum 100mm depth. We design and produce the elevated frames locally in the uk so this gives us the flexibility to be able to incorporate any angle or height requirements that are necessary for your project s realisation.

1075 2000 lbs. The stones are therefore much more substantial and hold up well under wind tunnel tests. Ballasted roof systems are simultaneously a roofer s best friend and arch nemesis. Typically 10 to15 pounds of ballast square foot are installed on the roof.

Extremely difficult to find a leak in this system since the membrane is well hidden. For buildings with a mean roof height greater than 30 ft. In many cases ballasted roofing also uses pavers in places of heavy traffic or even over the entire surface of the roof. Ballast stone fractures and gets sharper over time which can puncture the.

Since the ballast is the primary resistance to wind uplift there has to be a lot of ballast installed on the roof.