Roof Ballast Thickness

Ballast is required with 20 lbs s f.

Roof ballast thickness.

Typically requires crushed graded stone placed over a stone filter sheet rolled out over the insulation. 45 mil epdm rubber roofing 60 mil epdm rubber roofing 90 mil epdm rubber roofing. For built up roofing the gravel was generally 25 5 inches in diameter. The stones are therefore much more substantial and hold up well under wind tunnel tests.

Then the membrane is installed over the loose laid rigid insulation. June 3 2018 epdm membrane is manufactured in various thicknesses 045 to 090 thick and is available as a non reinforced or reinforced sheet depending upon application. Other thicknesses are also available for use in non roofing applications as a special order. What are the available thicknesses and types of epdm single ply membrane.

All membrane flashing and other detail work is completed. In the field of the roof a minimum of 10 lbs s f. 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. Needed at perimeters and at large penetrations.

The stones used in ballasted roofing are generally 1 5 2 5 inches in diameter and applied in a thicker layer. Crushed gravel that must be graduated. Epdm roof membrane comes in rolled sheets that are wide and long and manufactured in three common thicknesses. Concrete pavers with smooth trowel finish min.

Most roofers typically installed 10 15 pounds of ballast per square foot.