Stone Ballast Roof

Ballast is required with 20 lbs s f.

Stone ballast roof.

Contact hydrotech for specific installation guidelines. 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. The roof tends to flex a little better under the expansion and contraction of heat and cold making it a bit more durable. Ballasted roofs are durable and long lasting.

Needed at perimeters and at large penetrations. Though primarily confined to built up asphalt roofing systems it can be applied to single ply epdm rubber based membranes as well. 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. 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.

Large mixed color decorative rock. In windy areas ballast stone can actually blow off the roof creating projectiles below. Medium mixed color decorative rock. Stone ballast typically requires crushed graded stone placed over a stone filter sheet rolled out over the insulation.

Stone ballast is no longer allowed by many building codes. In the field of the roof a minimum of 10 lbs s f. Ballast stone can crush the underlying insulation creating weak spots in the roof membrane. The firestone epdm ballasted system is an economical epdm roofing system suitable for a wide variety of buildings.

The stone ballast on a ballasted roof system is the only thing holding the roof system in place. Over time the stones move around creating bald spots where the system isn t held down at all. There are no fasteners installed at all 3 and 4. 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.

2 1 2 8 unwashed rock. Single ply roofing materials aren t self adhered nor are they sealed together in any way. Unwashed landscaping decorative drainage and roof ballast stone. 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.

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