The Many Talents of a Flat Roofing Contractor
Category : Roof
A flat roof contractor has to be skilled in many different areas. They have to be able to work with a variety of materials, and to meet the standards of both a residential and commercial contractor. Flat roofs are identifiable by the fact that they have a small rise of around 7 centimetres leading to a run of around 30 centimetres which allows water to flow to the edges of the roof and stops it pooling in the middle. The benefit of this design is that it can help prevent water damage and leaks. The small slope lets water run off the roof into the gutter. Flat roofs are rarely used in areas with severe weather due to the chances of heavy rain or snow. Flat roofs are not as resistant to this type of weather as pitched roofs are.
Types of Materials
Tar, gravel, or modified bitumen are the most common materials used for flat roofs. These can last for around fifteen years, and are very cheap. They are however, quite messy to install because each layer of the roof is held together by the tar or bitumen. Tar and gravel roofs are built up with interspersed layers of saturated felt and tar or asphalt, and then topped off with a mixture of mineral and rock. Roof walkway systems gives the rood a higher weather resistance and allows you to walk on it more easily. If bitumen is the material used, then the layers are made of polyester or fibreglass with bitumen in between.
Roll roofing material is another common, economical material which flat roofing contractors need to be familiar with. Roll roofing has a short life span of only around ten years because it only has one layer. It is however, easier and neater to install because it is only made of an asphalt shingle mat.
EPDM (ethylene propylene diene monomer) is a rubber material which can also be used by flat roofing contractors. It is simple to install because it is also laid in a single layer. Underneath is a stiff insulation mat. Rubber will last much longer than tar, gravel, or bitumen, and can give a limited level of UV protection. In hotter climates, this can help in lowering energy costs. PVC mempane is also a good material to use as it does not have seams which can let in water. This reduces the chances of leaks on the roof. PVC mempane also reflects sunlight to some extent.
Metal roofing is becoming more popular as a material for flat roofing because it offers a lot of choice in terms of appearance and design. It also lasts for a very long time, up to fifty years, and needs very little maintenance.