Different Types of Flat Roof Material Options

We love the pliability of a flat roof surely design limitations, but they need a touch of a reputation for leaks and repairs.


Of course, Flat Roofing Contractors Brooklyn NY aren't flat but have a really slight roof pitch of between 1/4" to 1/2" per foot. only enough slope to empty water but also flat enough to be a drag if not constructed properly.


The good news is that there are material options for your flat roof beyond traditional hot-mopped built-up roofing which will increase the reliability of the flat roof.


Let's review the foremost common categories of flat roof materials available for your home:


  • Single-layer membrane roof

  • Modified bitumen roof

  • Built-up roof (BUR)


Single Layer Membrane Roof

The membrane roof is the latest roofing technology and is additionally the roof of choice in commercial construction. Known technically as elastomeric or elastomeric roof membrane (depending on the material), single-ply roofs are available a couple of different varieties including:


  • Neoprene (polychloroprene)

  • EPDM (ethylene propylene diene monomer)

  • PVC (polyvinyl chloride)

  • Chlorinated polyethylene and chlorosulfonated polyethylene sheets

  • Polymer-modified bitumens


Modified Bitumen Roofing

Modified bitumen cap sheet roofing was developed within the 1960s as a replacement technology for BUR, or built-up roofing, by using the proven technology of BUR but also adding polymer reinforced roof wear layers or cap sheets.


These roofs are often installed using any number of techniques which are determined by the project's specific requirements and material specified. These installation methods include:


  • Hot applied

  • Torch applied

  • Cold applied

  • Self-adhered


Built-Up Roofing

Going back about 120 years, the grandfather of flat roofs is that the built-up roof or BUR. Built-up roofs have solved the low-frequency roof problem for ages, a challenge that asphalt shingles could never handle.


Built-up roofs are installed using several layers of a special sort of roofing felt that has been asphalt impregnated and embedded in bitumen applied with a hot mop.


The hot-applied asphalt or pitch blends with the bitumen soaked roof felt and create a monolithic roof membrane. The roof felt/asphalt tar layering is repeated in overlapping layers until the assembly is 2 to four plies in thickness.

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