Pebbles on a roof waterproofed using tar and asphalt papers would serve the same purpose and on flat roofs would even allow foot traffic.
Why are some roof covered in pebbles.
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Check your attic to see if there is any daylight coming through the roof.
Daylight through the roof boards.
You notice a spongy feel or trampoline bounce when walking on the roof which means the underlying decking is weakened from moisture.
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Caledonia river washed pebbles designed to provide a vegetation fire break.
To calculate the approximate tonnage required please enter the length and width of the area and the depth in the appropriate unit.
Plan to have all parts of these materials out of sunlight either via green roof cover or some kind of trim.
This calculator is to help you estimate the amount of pebbles stone or gravel that you will need to cover a driveway garden paths or garden beds and more.
Although commonly called gravel the top layer is usually some sort of aggregate material such as pea gravel slag or mineral granules.
The answer to this clue has 5 letters and it appears in the down direction.
Also buy complete pebble packs for your sized roof.
Prices from 5 43 for 25kg pebble bags.
Instead of making your own solution there are specially formulated moss killers like the wet and forget moss remover link to amazon or the bayer 1 in 1 moss and algae ready to spray bottle link to amazon.
A 1 inch layer of pebbles can increase the load on your roof by about 10 pounds square foot when saturated while saturated light expanded clay granules will increase the load by only 2 pounds square foot.
Entire cities used to burn down chicago boston etc roofing shingles employ a coating of sand to keep fire brands from igniting the tar or asphalt in the shingles.
Buy green roof pebbles from sedum supply ltd.
Inconsistant or darker color on some parts of the roof is another sign the granules have worn away.