Friday May 20, 2022

The importance of proper flat roof construction

If you own a property with a flat roof, you might have heard about their susceptibility to problems or be experiencing issues yourself. A flat roof should, in theory, have no more issues than a regular roof but often due to poor construction or neglect, when problems do occur, they can be substantial. Flat roofs constructed of tar or asphalt could last as little as a decade, shingles fare better at around 35 years, while a slate-pitched roof can stand for over a century. Whatever your roof type, a regular checking and maintenance routine will prevent costly repairs.

Gravel Flat Roofs

The reason gravel and pea shingle are used on flat roofs is to provide a coat and some UV protection. The gravel also helps to weigh down the roof material, reducing the risk of high wind damage. The UV protection occurs when the shingle or gravel pieces absorb the sun’s rays, helping to prevent the roof material becoming dry and brittle over time. Of course, the efficacy of the gravel relies greatly on how well it has been fixed to the roof. If it’s applied poorly, exposure to the elements occurs for the roofing material underneath.

When shingle is laid, it must be correctly bonded to the existing surface material. Normally, this process takes place when the mastic asphalt is still warm, or it can be stuck down with a bitumen adhesive. Gravel or shingle that’s laid on a dry surface will be completely ineffective. That is why it’s so important to use a reputable company with lots of experience. For Flat roofing Evesham, contact Flat roofing Evesham experts LW Roofing

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Flat roofing is more vulnerable to wind than a regular pitched roof, so if the gravel is not weighted, the nails attaching the roof material to the timber are completely exposed and the only things holding your roof against the power of nature.

Moss and Silt

Flat roofs, despite the name, should be built with a slight incline for the purposes of drainage. If you find a build-up of moss or silt, it could be that your roof has not been constructed with the correct incline. A flat roof needs a slight incline to prevent water from pooling. If there are signs of vegetation growing, that’s an indication that too much moisture is hanging around. The consequences of standing water include damage to your timber, warping and possible interior leaking.


Many insurers see flat roofing as vulnerable and you may have had difficulty gaining house insurance, especially if over a third of your roofing is flat. It is seen as just too risky. Additional problems include flat roofing that has been made from non-standard industry materials. The use of non-standard materials always has an impact on home insurance quotes.

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