The first is to protect the underlying layer of roofing materials on built up roofs burs and the second is to secure or weigh down the roofing material as is the case with single ply flat roofs.
Rock roof covering.
Contractors and builders use gravel on flat roofing for two primary reasons.
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This surface layer weighs down the built up roof protects it from sun exposure and serves as decoration.
The surface is coated with bitumen and a layer of gravel or crushed rock to hold the roofing material down and minimize damage from the sun and from abrasion.
Variations in terms of roof structure pitch and roof covering lead to some unusual and inventive designs here we take a look at the different roof coverings available from the types of roof tiles on the market to tile alternatives and where they are best suited.
Its unique fiber reinforced homogeneous composition gives the panel strength and water resistance through to the core.
They can be partially loose laid and held down with river rock ballast requires roof structure to support the weight or fully adhered to the roof deck.
When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary.
A properly installed slate roof covering can easily last for 100 years requiring little maintenance spray foam roofing.
Membrane roofs are attached in a variety of ways.
The range of choices available when it comes to your roof can be daunting.
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.
There are different types and weights of gravel used on flat roofs for these purposes.
The light colored gravel also reflects the sun s heat.
Slate roofing is one of the most durable roofing materials available today.
A built up roof for example will typically include the built up membrane itself with or without gravel as well as some kind of insulation and cover board which will vary in thickness from roof to roof.
It tells a story of the land it came from and the men who labored and handcrafted the rock into tiles.
To weigh down or secure the roofing material as is the case with single ply flat roofs.
A tar and gravel roof or built up roofing consists of several layers of waterproof material alternated with hot tar and a surface layer of mineral aggregate often smooth river stone.