The roofing industry has known for quite some time the drawbacks of using traditional asphalt shingles on flat or low pitch roofs.
Why do flat rubber roofs have stones on them.
A flat roof will have several layers of a thin membrane made of tar asphalt and or bitumen material.
Shingles require a little help from gravity to create a seal against leaks and with flatter roofs gravity s influence simply isn t significant enough to do the job.
However rubber roofs have many inherent.
The gravel also acts as a protective measure to prevent natural debris such as leaves from flowing towards and clogging the drains of the flat roof instead trapping them in place.
However both rubber and asphalt will lose plasticizers and other v.
In a typical tar and gravel roof which by the way is gradually being supplanted by gravelless roof systems you put down a layer of tar paper then tar and finally gravel.
Most people refer to a flat roof as a rubber roof.
Rubber roofing epdm single ply membranes is the most common flat roofing system in new england ma ct nh ri etc and the rest of us flat roofing marker.
To help reduce leaks and create a.
In the summer it gets pretty soft and if left to its own devices would flow to the lowest point on the roof.
The majority of them are familiar with asphalt shingles and do not have much experience in flat roof materials.
The main reason for such popularity of rubber roofs is the lower initial price tag.
A flat roof typically has a rubber or asphalt impregnated membrane.
Pebbles or small rocks spread several inches thick over the outer roof mem.
We had to replace a big portion of our flat roof recently.
The stones force it to stay put.
All roofing contractors are not equal.
Your roofing merchants can supply the stones.
Modified bitumen roofs are a mix of asphalt and rubber with a layer of gravel embedded in the top layer of material during manufacture to provide uv protection.
2 to break up the rain into fine mists and keep the noise level down.
The stones does 3 things 1 help to keep the roof fire resistance.
Tar has a low melting point.
A two ply modified bitumen torch down rubber roof with embedded ceramic granules is the best roofing system on the market.
Though primarily confined to built up asphalt roofing systems it can be applied to single ply epdm rubber based membranes as well.
These small stones are worth more than their weight in the protection they offer for underlying roofing materials and the barrier they provide to external elements like ultraviolet rays and harsh weather elements.
Having a large flat roof this is something that i pondered on too.
3 to protect the roofing felt from perishing and heat melting the bitumen.
