Roof Type Built Up

A roofing type which has developed out of the built up systems is modified bitumen which we covered here.

Roof type built up.

The concept been around for over 100 years although the. The built up roof technique is used for any roof that cannot be shingled because the pitch is too low. Depending on the climate and the specific materials used built up roofing has an average. For over 100 years.

Bur is suitable for most low slope roofing applications. Built up roof bur the traditional hot tar and gravel roof is built from three or more plies of waterproof material alternated with hot tar and ballasted by a layer of smooth river stone. Asphalt is less durable but often less expensive and is a by product of petroleum manufacturing. A ballasted roof is not adhered or anchored to the roof membrane in any way.

These roof systems are commonly referred to as tar and gravel roofs. You can choose the number of layers or plies that are installed. This is one of the main reasons they have become such a stalwart in the roofing industry. There are 3 types of built up roofing which include.

Built up roofing systems have been in use in the u s. Hot asphalt bitumen is the bonding and waterproofing agent between layers. Built up systems are installed by alternating layers of asphalt or tar and supporting fabrics directly onto the roof. Built up roofing is basically a flat roofing technique and was the most popular form of roofing for flat roofs until the single ply roofing technique was developed and became popular.

Coal tar is the more durable of the two bitumen products and is made using by products of coal production. Built up roofing types advantages and applications types of built up roofing. Metal roofs are generally known for their low maintenance aesthetic appeal and a finish that protects them from sun and water damage. Essentially modified bitumen is a traditional asphalt product which has undergone modifications which increase flexibility and enhance the built up roofing systems.

Then the building owner must decide whether to restore or replace their roof while there are some situations when replacement is necessary metal roof restoration may be more accessible than many people think. The felts are reinforced with either glass fiber mats or organic mats ply sheets and when joined with the bitumen form a durable roofing membrane. However after many years that finish may fade or deteriorate. A traditional built up roofing bur system derives its name from the building of a roof on site using layers of base sheet interply sheets and cap sheet or other surfacing such as gravel or liquid coating.

When it was first introduced people were confused about its durability. Built up and modified systems. The building code identifies the lowest pitched roof where shingles are allowed. Gravel is an excellent fire retardant.

Built up roofing systems have a 120 year track record of success. There are two main types of built up roofs and each is categorized by the binding agent or bitumen that is used. Popular in north america for more than 100 years built up roofing bur systems are composed of alternating layers of bitumen asphalt and fabrics called roofing felts.