Membrane is a term used in roofing for various types of felts and roof coverings. Applied in both pitched and flat roofing, membranes are used to assist the removal of water vapour from roof spaces. Browse our range of breathable and non-breathable membrane solutions in our selection of pitched roof coverings at Roofstores.
What is non breathable membrane? Non breathable membrane is used to create a watertight covering that protects the interior of an already ventilated building. It comes in a large sheet roll and creates a barrier that reduces the changes of mould and damp forming between the slate or tile and the battens.
Benefits of non breathable membrane
Suitable where ventilation already exists
Blocks most moisture transfer
Blocks condensation from escaping
How do I know if I need a non breathable membrane? There are two main types of membrane, breathable and non breathable. The primary function of both is the same — they are designed to keep moisture from causing problems including damp, mould and fungal growth. However, they both tackle condensation in different ways. Non breathable membranes are most often used below slate or tiles in cold, ventilated pitched roof systems.
Is a dry ridge system better than mortar? Yes, using a dry ridge system is better than mortar. Not only is it less time-consuming, but it is more durable too. Mortar will crack over time and bits fall out, which will lead to an unstable and unprotected roof ridge. British standards now also suggest that traditional mortar methods of fixing tiles onto roofs should only be used when it is absolutely necessary.
How long does a non breathable membrane last? Non breathable membrane lasts around 15 years. It will lose its integrity over time.