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Flat roof stone ballast.
It is however ballasted generally with gravel.
I was on the roof about 2 hours after sundown and the roof appeared uniform in temperature.
A ballasted roof means that the roof membrane is not anchored or adhered in any way to the decking material.
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.
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.
Next the membrane is rolled over the insulation 2.
Stones have been used as roofing ballast since antiquity and in its modern form stone ballast goes back to at least the 1970s.
The insulation is loose laid onto the decking.
Though primarily confined to built up asphalt roofing systems it can be applied to single ply epdm rubber based membranes as well.
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.
A number of attachment and ballast options are available depending on the planned system and the conditions on site.
Stone ballast roofs if you ve ever seen a flat roof covered with gravel and wondered why the answer is simple it s there to keep the roof in place.
Additional benefits of ballast on a flat roof the gravel in a ballasted roof helps absorb heat preventing the sun from heating the roof materials below and making the roof more energy efficient.
Your flat roof requires repairs but it s covered in either gravel or ballast stones which makes it challenging to work on.
Roofing stone is available in 1 1 1 2 roof ballast and 3 8 washed pea stone designed to be used on flat rooftops please note.
The stone ballast on a ballasted roof system is the only thing holding the roof system in place.
There are no fasteners installed at all 3 and 4.
The easiest way to use flat roofs for photovoltaic systems the s flex roof frame with ballast is the simple and proven solution for non penetrative green roof compatible flat roof installations.
I recently looked a leaky flat rubber mambrane roof having large river stone ballast.
