Stone Ballast Roof

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

Stone ballast roof.

2 1 2 8 unwashed rock. The firestone epdm ballasted system is an economical epdm roofing system suitable for a wide variety of buildings. Roof areas subjected to different wind action require varying amounts of ballast. There are no fasteners installed at all 3 and 4.

Over time the stones move around creating bald spots where the system isn t held down at all. In the field of the roof a minimum of 10 lbs s f. The roof tends to flex a little better under the expansion and contraction of heat and cold making it a bit more durable. Unwashed landscaping decorative drainage and roof ballast stone.

Single ply roofing materials aren t self adhered nor are they sealed together in any way. Stones or concrete pavers protect the waterproofing layer from uv rays hail and foot traffic. 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. Ballast stone can crush the underlying insulation creating weak spots in the roof membrane.

Ballast is required with 20 lbs s f. The insulation is loose laid onto the decking. Next the membrane is rolled over the insulation 2. Large mixed color decorative rock.

Ballasted roofs are durable and long lasting. In windy areas ballast stone can actually blow off the roof creating projectiles below. 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. Though primarily confined to built up asphalt roofing systems it can be applied to single ply epdm rubber based membranes as well.

Stone ballast is no longer allowed by many building codes. Needed at perimeters and at large penetrations. 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. Contact hydrotech for specific installation guidelines.

The stone ballast on a ballasted roof system is the only thing holding the roof system in place.