Two basic types of roofing felt material are required.
Three layer felt built up flat roofing.
Flat roofs usually come with a 10 to 20 year warranty but can last 25 years if you.
Three layer felt systems have come a long way from the early days.
In this case a triangular fillet of timber is fitted along the join of the roof wall to allow the felt to be run up the wall with the top of the felt being covered by flashing see edge detail 3.
29 74 kg.
6 15 lbs.
Built up roof membrane 4 ply smooth surfaced.
The hot applied asphalt or coal tar pitch blends with the bitumen soaked roof felt and creates a monolithic roof membrane.
There are many different types of flat roofing systems available each one with their own pros and cons.
Built up roof membrane 4 ply gravel surfaced.
We ll be happy to discuss your needs and give you a quote.
Built up roofs are installed using several layers of a special type of roofing felt that has been asphalt impregnated and embedded in bitumen applied with a hot mop.
600 1500 lbs.
Where the roof butts up to a vertical wall.
6 11 lbs.
They can be used on timber metal and concrete decks.
Flat roofs are made up of a number of layers which are usually.
If you need a flat roof which will be long lasting efficient and pleasing on the eye then give us a call to find out more about the 3 layer felt roof system.
Pros and cons for flat roof materials.
The roof deck a vapour control layer a thermal layer a waterproofing layer and a surface layer.
The layers that make up a flat roof the roof deck can be made of metal timber concrete composite or plywood and will support your flat roof.
One special type of built up roofing called ballasted roofing uses large stones about 1 1 2 to 2 1 2 inches in diameter for the surface layer.
The products used today are a 3 layer membrane system applied with the use of a gas gun.
With a ballasted system the lower layers are not adhered or fastened to the roof structure and the heavy surface layer keeps the roofing in place.
They are no longer laid with hot bitumen and have stone chippings put on top.
Today s high performance felts are reinforced with polyester or glass or a mixture of the two and are coated and impregnated with bitumen.
All three types of flat roofing cost 250 to 350 per square 100 square feet but prices vary according to region and size of the roof.
They had a stereotypical belief they were only good enough for your shed or garage.
Third layer the third top layer is a fire rated polyester based mineral cap sheet which is available in various colours.
Owens corning roofing and asphalt.
Built up bituminous membranes are probably the most economic and common form of roof covering material for domestic flat roofs.
