This blog post will give a general overview of the different types of flat roofing materials that are available in the UK with a pro and con for each. This should help you to choose the correct flat roofing material to use on your new flat roof.
In the main there are 4 categories of flat roofs available, these are, Torch-on Felt systems, EDPM roofs, this is rubber or synthetic system, Fibreglass system or Liquid roofing system.
Torch-on Roofing Systems.
Pros for a Torch-on Felt flat roof system:
Non-rot materials: A torch-on/SBS system will not rot or decompose within the lifespan of your roof, this is due to the high-performance polyester core and the SBS (Styrene-Butadiene-Styrene) within the bitumen membrane.
Cons for a Torch-on Flat roof system
One of the disadvantages of a torch-on flat roof system is the roofer having to use a propane torch to install the product, there is a significant up-weight on a roofer’s public liability insurance for ‘hot works’. If you are having torch-on roofing works carried out at your home or business premises, you would be advised to ask for a copy of the Public Liability insurance and double check the roofer is covered for Hot works.
EDPM roofing systems.
The pros of using an EDPM roofing system.
This product is only applied when cold, which means most roofers are covered by their insurance, it is easy and quick to install usually by an approved contractor using water-based glue on a fleece-backed product.
The cons of using an EDPM
The fleece has been known to detach from the membrane due to movement within the property structure, (all flat roofs expand and contract in different weather conditions) Also using a water-based adhesive can cause bubbling if it is not correctly installed.
Fibre Glass roofing systems
These generally consist of a resin and hardener, fibreglass matting and a topcoat (the top coat can be coloured.
Pros of using a fibreglass roofing system.
No heat is required to install the system, mixing up a two-part system for the base i.e. resin and hardener laid and fibre glass matting rolled into the product and then a top coat is applied. It is also available in multiple colours and with a competent roofer can be a quick solution.
Cons of using a fibreglass roofing system.
Fibreglass has little or no elongation (stretchability) flat roofs are generally constructed from timber which will expand and contract with the weather causing the fibreglass to crack and split.
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