To weigh down or secure the roofing material as is the case with single ply flat roofs.
Reason for roofs with pebbles.
There are different types and weights of gravel used on flat roofs for these purposes.
This is for a roofing membrane that is not fully adhered to substrate and the pebbles are essentially acting as a paperweight.
Gravel to protect built up.
Causes effects of loss of protective mineral granules from roof shingles asphalt roof shingle defects.
Gravel is used on flat roofs for two reasons.
To protect the underlying layer of roofing materials as is the case with built up roofs burs.
Normal defective product storm damage foot traffic etc.
I really like it for some reason.
Roofing ballast is usually the little pebbles you see on a flat ish roof.
Pebbles are picked up and left on the roof edge by these birds several storeys high and a few centimetres further and that pebble would have joined the others that crashed down onto the glass canopy below causing thousands of dollars of damage and serious risk to public health.
Caledonia river washed pebbles designed to provide a vegetation fire break.
December 22nd 2010 at 7 37 pm.
Prices from 5 43 for 25kg pebble bags.
Photos and text guide diagnosis of asphalt roof failures causes effects of loss of protective mineral granules from roof shingles description of different causes of roof shingle granule loss.
Contractors and builders use gravel on flat roofing for two primary reasons.