Steps For A Modified Flat Roof

The goal of this article is to help building owners architects and contractors decide which commercial roofing options are right for each unique project.

Steps for a modified flat roof. Bur consists of many layers. Today s variety of flat or low slope commercial roofing options roof pitches ranging from 12 to 3 12 is no longer simple and has grown considerably in the last 50 years. If the surface is smooth you may be able to reroof using sheets of modified bitumen or epdm rubber roofing. Just because a roof is classified as a flat roof that is a roof with a slope of less the 2 12 does not mean it is a modified bitumen roof.

A flat roof is not flat it just has a very low slope. It is an evolution of asphalt roofing and is easy to install compared to the older style of tar and gravel. Basic steps of modified bitumen roofing installation modified bitumen roofing is a form of membrane flat roofing. Built up roof bur modified bitumen roof mbr and rubber membrane roof epdm.

Built up roofing bur was the most common type of flat roof before modified bitumen and membrane roofing were developed. To properly identify a modified bitumen roof you can look at the featured image of this post or the pictures below. Flat roofs usually come with a 10 to 20 year warranty but can last 25 years if you. A bottom layer or two of insulation board multiple intermediate layers of tar or asphalt alternated with layers of roofing felt and a top layer of gravel.

Pros and cons for flat roof materials.