Flat Roof Felt Types

It s the least expensive but also needs replacing most regularly.

Flat roof felt types.

Most people have in mind the old pour and roll felts of yesteryear and these were thin bitumen felts glued together with a hot liquid bitumen between each layer. Built up roof bur the traditional hot tar and gravel. Bitumen felt flat roofs are affordable in price and provide a great waterproofing result. 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.

This type of flat roofing felt has been in use for decades and is still used today. The longevity of the roof depends on the quality of the materials used. Also known as glass reinforced plastic grp fibreglass flat roofing is quick. There are many different types of flat roofing systems available each one with their own pros and cons.

Suitable for small garages to large warehouses felt roofing remains a popular cost effective choice. The hot applied asphalt or coal tar pitch blends with the bitumen soaked roof felt and creates a monolithic roof membrane. Roofing felt is one of the oldest available options and advances made in the past decade or so have begun to move more towards the torch on approach. It is then rolled out and can be held down with nails or asphalt cement.

Built up felt roofing consists of two to three layers of bitumen sheet that have been bonded together using either hot bitumen or adhesive. This type of flat roof still has a bad reputation with some people but i m going to tell you why that perception is out of date. There will be multiple layers of which the top one is gravel coated so similar to rbm. In the traditional poor and roll process bitumen is supplied in blocks broken up and heated on site in a boiler until molten.

The product can be used as a waterproofing coating on asphalt fibre cement sheeting concrete and bituminous roofing membranes. One of the oldest types of flat roof. 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. Felt is bonded with asphalt in the factory.

With an average life expectancy of 15 to 30 years flat felt roofing is economical but has a tendency to crack as it ages and the temperature changes. Layers of bitumen felt are heat welded onto each other to form an impenetrable barrier. Ikopro solvent free water proofer is an easy to use bitumen based emulsion for roofs. Here is a video showing how the felt is installed on the flat roof.