A roof membrane is installed on flat, or low slope roofs to protect the building from water ingress, and provide insulation and warmth. Traditional flat roofing methods including gravel, felt and asphalt do not offer the same levels of durability or ease of installation as membrane roofing – and, especially when situated in a high, very high or extra high wind zone level, these two factors are very important.

What are the advantages of using liquid applied waterproofing membranes?

Whether residential or commercial, reliable and durable waterproofing roof systems are vital to ensuring a building’s longevity.

A liquid applied waterproofing roof membrane is a proven and cost-effective solution – particularly when compared to the expenses associated with repairing leaks and water damage.

Liquid applied membranes are safe and relatively easy to install, can be adhered to various substrates, and result in a seamless finish, covering any existing voids or cracks. This means that it is a highly preferable solution in colder climates, with a far lower risk of roof failure.

How are flat roof membranes applied to warm roofs and cold roofs?

A cold roof, where insulation is laid between the rafters, has low thermal efficiency and is more expensive to repair than a warm roof, where the insulation is placed on top of the roof deck but under the roof covering. For a cold roof, the membrane will be adhered to the roof substrate, while with warm roofs, the membrane is laid over the insulation.

What are the most common compositions of a flat roof membrane?

A multi-layered torched on the bituminous membrane is among the more popular solutions for flat and low slope roofing systems, with other options being butyl rubber, PVC and the more recent addition of TPO to the fold.

Green roofs, or living roofs, provide a greater waterproofing challenge, with the membrane constantly exposed to moisture and any leaks difficult to find, and more challenging to fix. A green roof will need a membrane that is resistant to foot traffic, chemicals such as fertilisers and root penetration. Thickness is a further key consideration, with a minimum recommended thickness for single-ply and mod-bit membranes of 1.5mm.