Roof Ballast Rock

Stone ballast typically requires crushed graded stone placed over a stone filter sheet rolled out over the insulation.

Roof ballast rock.

Business hours monday thursday 7 00am 6 00 p m f r i d ay 7. 2 1 2 8 unwashed rock. White ballast can range in size from 2 1 2 3 4 inches and can be made to meet various astm standards. Medium mixed color decorative rock.

Ballast stone can crush the underlying insulation creating weak spots in the roof membrane. Contact hydrotech for specific installation guidelines. Click here to edit text. Unwashed landscaping decorative drainage and roof ballast stone.

Ballast is required with 20 lbs s f. Stone ballast is no longer allowed by many building codes. Single ply roofing materials aren t self adhered nor are they sealed together in any way. There are no fasteners installed at all 3 and 4.

Large mixed color decorative rock. Ballast river rock removal ballast vacuuming services will remove all river rock from single ply roofs. The stone ballast on a ballasted roof system is the only thing holding the roof system in place. Ballast is commonly used with roofs made of tar and gravel roof alternatives including ethylene propylene diene monomer epdm polyvinyl chloride pvc and thermoplastic polyolefin tpo single ply flat roofs.

Our roofing ballast is commonly installed over membrane and single ply systems at 1000 1500 pounds per square. The insulation is loose laid onto the decking. When the concept first came to the u s plenty of roofers scratched their heads and wondered how the roof stayed on without being anchored especially during high winds or storms. Most importantly saves time allowing projects to run efficiently.

Next the membrane is rolled over the insulation 2. A1 grit ballast is a natural smooth water worn and screened large gravel used for many applications. In the field of the roof a minimum of 10 lbs s f. Needed at perimeters and at large penetrations.

A ballasted roof means that the roof membrane is not anchored or adhered in any way to the decking material. In windy areas ballast stone can actually blow off the roof creating projectiles below. Over time the stones move around creating bald spots where the system isn t held down at all. 0 0 a m 5.

In gravel ballasted roofing systems the waterproofing membrane is covered and ballasted against wind uplift and other exposures with a layer of gravel. The firestone epdm ballasted system is an economical epdm roofing system suitable for a wide variety of buildings. Conventional gravel ballasted roofs have been built for many years and are suitable on most flat roofs and structures.