Built-up Felt Roofing
Felt roofing for flat roofs are a type of built up roofing systems known as BUR roofing. In a BUR felt roof multiple layers of bitumen felt is applied to form a waterproof dense roof. BUR felt roofs are excellent choices for commercial or residential flat roofs. Built up felt roofing is a traditional type of roofing system used for flat roofs all over the United Kingdom.
Felt Roofing System
Felt roofing has changed over the years and the materials have improved through technological advances. Most felt roofs are made up of two – three sheets of felt materials. Roof Control uses high performance felt in their felt roofing systems.
Most felting materials are made from either elastomeric or a form of polyester. This composite material is coated with a waterproofing agent to form a water resistant barrier. The advantages of using a felt roof are many. One advantage is that they have been used for years and they have a proven record of holding up to all kinds of weather.
Felt roofs are scalable – they can be used successfully on both small and large roofs. In addition, the high performance materials have all been tested and evaluated and they have been found to be both durable and long lasting. It is also possible to use felt roofing systems on different kind of roofs including flat, pitched or even curved.
Installing a felt roof
Felt roofs are installed on site. Felt is applied directly over a concrete roof decking or insulated timber. The installation is done by Roof Control roofing experts who use either torches or an application of hot bitumen which is poured over the BUR felt, or the felt can be sealed with applied adhesive. If sealed with hot bitumen then it is applied at approximately 240 degrees C and is poured as the felt is unrolled. This hot tacky substance will end up covering the whole length of the roof ensuring that any minute cracks are sealed. It also provides a clean covering over the joints of the felt.
The use of a hot gas torch can also be used for sealing the special felt. This type of technique is generally restricted to smaller roofs or for roof repairs where there is a combination of roofing materials being blended. As with the use of any direct flame, all precautions are taken in terms of fire prevention. The last method of installing a felt roof is called Cold Applied Adhesive which requires that an adhesive be applied to the roof first and the felt is rolled out on top of the adhesive. The adhesive is then applied over the lapping joints.
Top Roof Felt Covers
For reasons of both aesthetics and to add additional waterproofing you can add a top layer over the felt roof. You have a variety of different options to choose from including stone chippings, fine sand, slate flakes, reflective paints, or a mineral aggregate. If there is going to be human traffic on the roof you will want to have a covering such as fibre cement, plastic, rubber, paving stones, concrete slabs or porous concrete.
BUR felt roofs are particularly economical and can be used on garages, sheds and commercial or residential homes.
All felt roofing systems come with a guarantee from Roof Control for up to twenty years.