Stone Ballast Roof

Stones or concrete pavers protect the waterproofing layer from uv rays hail and foot traffic.

Stone ballast roof.

Over time the stones move around creating bald spots where the system isn t held down at all. Stone ballast typically requires crushed graded stone placed over a stone filter sheet rolled out over the insulation. Single ply roofing materials aren t self adhered nor are they sealed together in any way. The firestone epdm ballasted system is an economical epdm roofing system suitable for a wide variety of buildings.

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. Stone ballast is no longer allowed by many building codes. Though primarily confined to built up asphalt roofing systems it can be applied to single ply epdm rubber based membranes as well.

Ballast stone can crush the underlying insulation creating weak spots in the roof membrane. Unwashed landscaping decorative drainage and roof ballast stone. The insulation is loose laid onto the decking. The stone ballast on a ballasted roof system is the only thing holding the roof system in place.

Next the membrane is rolled over the insulation 2. Ballast is required with 20 lbs s f. In the field of the roof a minimum of 10 lbs s f. 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.

2 1 2 8 unwashed rock. 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. 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. Needed at perimeters and at large penetrations.

Contact hydrotech for specific installation guidelines. Roof areas subjected to different wind action require varying amounts of ballast. In windy areas ballast stone can actually blow off the roof creating projectiles below. Medium mixed color decorative rock.

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.