Stone Ballast Roof

2 1 2 8 unwashed rock.

Stone ballast roof.

The roof tends to flex a little better under the expansion and contraction of heat and cold making it a bit more durable. There are no fasteners installed at all 3 and 4. Unwashed landscaping decorative drainage and roof ballast stone. 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.

In windy areas ballast stone can actually blow off the roof creating projectiles below. Medium mixed color decorative rock. Ballast stone can crush the underlying insulation creating weak spots in the roof membrane. Needed at perimeters and at large penetrations.

Ballasted roofs are durable and long lasting. Ballast is required with 20 lbs s f. Click here to edit text 2 round blue gravel approx 1 1 2 3 excavated from our pond with a natural blue tint with brown and natural color hues. In the field of the roof a minimum of 10 lbs s f.

Contact hydrotech for specific installation guidelines. The amount of ballast varies from 50 to 65 kg m 10 to 13 psf in conventionally loose laid gravel stone ballasted single ply assemblies. The purpose of stone or gravel ballast on a flat roof it is not unusual to find a gravel top coat on commercial roofing systems. Large mixed color decorative rock.

Over time the stones move around creating bald spots where the system isn t held down at all. Stone ballast is no longer allowed by many building codes. It can be applied on any building that can accommodate the extra load of the ballast and where the roof slope does not exceed 10. The firestone epdm ballasted system is an economical epdm roofing system suitable for a wide variety of buildings.

Though primarily confined to built up asphalt roofing systems it can be applied to single ply epdm rubber based membranes as well. Stone ballast typically requires crushed graded stone placed over a stone filter sheet rolled out over the insulation. Next the membrane is rolled over the insulation 2. The insulation is loose laid onto the decking.

Single ply roofing materials aren t self adhered nor are they sealed together in any way.