Flat Roofing Methods

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.

Flat roofing methods.

Modified bitumen flat roofing modified bitumen is rolled out onto your roof typically using a blowtorch to secure the modified bitumen to your flat roof. Thermoset membranes are made with layers of synthetic rubber polymers such as epdm cspe and neoprene. If the roof deck can withstand the weight a ballasted loose rock roof may be the best option. The most common type used for residential flat roofing is epdm ethylene propylene diene monomer a synthetic rubber sheet material that is also commonly used as a pond liner.

Membrane roofing consists of a layer of insulation board topped by sheets the membrane of epdm rubber or other material. Fasteners are typically spaced 12 inches o c. A flat roof is a roof which is almost level in contrast to the many types of sloped roofs the slope of a roof is properly known as its pitch and flat roofs have up to approximately 10. 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.

Single ply attachment methods the project and situation will help determine the best attachment method. There are several methods and materials for the design of the exterior surface of a warm or cold flat roof. Getting the balance right here is crucial as too much weight will inevitably lead to an unstable roofing structure. Understandably there are dangers involved with the installation especially with an inexperienced roof installer.

The mechanically attached method consists of fastening each row of membrane to the roof deck with screws and barbed plates. Flat roofing under construction plywood decking is then used to cover the joists with the width in between also determined by the weight being placed upon them. Flat roofs usually come with a 10 to 20 year warranty but can last 25 years if you build the roofs right and maintain them using commonsense rules. Single ply roofing is a popular option for commercial buildings and can be used on any slope of roof.

Single ply roofing is either fully adhered or mechanically attached. But if the slope of the roof is greater than 2 12 then this system may not be appropriate. The fully adhered method consists of gluing the membrane directly to insulation or to the substrate. Hot tar and gravel also known as the built up roof bur this type of flat roof features three or more layers of waterproof material mixed in an alternating fashion with hot tar and a layer of smooth stone like gravel.

Pros and cons for flat roof materials.