Flat Roof Felt Systems

Lay it out alongside the completed strip overlapping the second strip about 50mm 2 inch on top of the first strip.

Flat roof felt systems.

This can include epdm rubber and fibreglass talked about above but commonly especially in the trade and in this article it refers to pvc tpo tpe and pib. This is often the case with corrugated tin roofs which are no longer allowed under current uk building regulations. There are also instances where a new flat roof is installed to replace an outdated roof system. 1 built up torchon felt system this type of flat roofing felt has been in use for decades and is still used today.

Flat roof felt roofing felt is one of the more popular and traditional methods of creating a flat roof. When the first run is complete roll out the felt and measure cut for the second strip. While laying felt is not an easy job it can be done by anyone who has the patience to deal with it. Here are simple steps to get you started.

The hot applied asphalt or coal tar pitch blends with the bitumen soaked roof felt and creates a monolithic roof membrane. However it wasn t particularly long lasting or durable so torch on felt was created. Felt is laid on a flat roof to help keep the roofing system waterproof. Built up roofing bur was the most common type of flat roof before modified bitumen and membrane roofing were developed.

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. Felt roofing also known as tar paper is traditionally installed using hot bitumen to create a secure bond between the roof and the felt. Layers of bitumen felt are heat welded onto each other to form an impenetrable barrier. Repeat this on the other half of the sheet.

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. 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. Bituminous felt is a form of waterproof sheeting that is used to cover flat roofs or as an underlay beneath slate or tile roofing. As you work away from the centre spread the felt away so that it is flat against the decking.

The substance itself is made from bitumen which comes from the distillation of crude oil that has been either mixed with sand or crushed limestone. Pros and cons for flat roof materials 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. A flat roof is usually the preferred choice for extensions likely to be positioned nearby to an existing structure. Step 1 prep work.