Roof Ballast Thickness

Finally the ballast stone or and pavers are laid down throughout the roof system.

Roof ballast thickness. Other thicknesses are also available for use in non roofing applications as a special order. In the field of the roof a minimum of 10 lbs s f. 45 mil epdm rubber roofing 60 mil epdm rubber roofing 90 mil epdm rubber roofing. Most roofers typically installed 10 15 pounds of ballast per square foot.

Concrete pavers with smooth trowel finish min. Needed at perimeters and at large penetrations. Then the membrane is installed over the loose laid rigid insulation. All membrane flashing and other detail work is completed.

Contact hydrotech for specific installation guidelines. Typically requires crushed graded stone placed over a stone filter sheet rolled out over the insulation. The stones used in ballasted roofing are generally 1 5 2 5 inches in diameter and applied in a thicker layer. For built up roofing the gravel was generally 25 5 inches in diameter.

Crushed gravel that must be graduated. Gravel in form of round smooth river washed aggregate without broken pieces nominal 16 to 32 mm. What are the available thicknesses and types of epdm single ply membrane. 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.

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.