We had to replace a big portion of our flat roof recently.
How do pebbles get on roof.
Prices from 5 43 for 25kg pebble bags.
You can also inspect the shingles directly by getting on the roof.
Do not apply coating directly over gravel.
Replacing or repairing a roof is a daunting task for even the most skilled home handyman but that doesn t mean you have to call the roofing company immediately.
Added benefits of bur flat roof gravel.
Shingle sediment is made up primarily of sand like granules or grit that separate from asphalt shingles and other small matter that sticks to the roof surface and washes into gutters.
Also buy complete pebble packs for your sized roof.
You might also see granules washing off the roof through the drain spouts.
Caledonia river washed pebbles designed to provide a vegetation fire break.
This is costly and guaranteed to fail.
Do not apply fabric membrane to a gravel roof.
Buy green roof pebbles from sedum supply ltd.
The overall weight on the roof is reduced and roof protection can be renewed repeatedly.
For mineral based felting the pebbles are there to help protect the felting as ballast depending on the fitting type and to help prevent water pooling aparantly.
Admittedly one that i have not seen but i haven t been in the desert since i was a kid.
A newer way to look at the roof is to fly over it with a camera drone and look at the roof that way.
This is costly and guaranteed to fail unless surface has been filled and smoothed.
Granules naturally separate from shingles over its life.
This appears to be a form of roof ballast.
It seems to be most prevalent early and later in the shingles life.
Because the gravel holds and releases heat the layer of gravel on a bur flat roof can both help water evaporate and keep heat away from the underlying roof structure.
This is for a roofing membrane that is not fully adhered to substrate and the pebbles are essentially acting as a paperweight.
On more expensive mebrane rooves you dont need pebbles.
If the shingles are compromised water will get under them and cause the growth of molds.
Having a large flat roof this is something that i pondered on too.