Roof Ballast Thickness

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

Roof ballast thickness.

In the field of the roof a minimum of 10 lbs s f. Finally the ballast stone or and pavers are laid down throughout the roof system. Ballast is required with 20 lbs s f. Typically requires crushed graded stone placed over a stone filter sheet rolled out over the insulation.

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. Other thicknesses are also available for use in non roofing applications as a special order. 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. All membrane flashing and other detail work is completed.

The stones used in ballasted roofing are generally 1 5 2 5 inches in diameter and applied in a thicker layer. Epdm roof membrane comes in rolled sheets that are wide and long and manufactured in three common thicknesses. Crushed gravel that must be graduated. Contact hydrotech for specific installation guidelines.

Gravel in form of round smooth river washed aggregate without broken pieces nominal 16 to 32 mm. For built up roofing the gravel was generally 25 5 inches in diameter. Then the membrane is installed over the loose laid rigid insulation. Concrete pavers with smooth trowel finish min.

45 mil epdm rubber roofing 60 mil epdm rubber roofing 90 mil epdm rubber roofing.