There are many roofing membranes available. One option is a breather membrane, sometimes called a breathable membrane. This article explains what breather membranes are, how they work, and why they are used in roofing.

In this article, we cover:

• What is a breather membrane used for
• What is the difference between a breathable membrane and a non-breathable membrane?
• Why breather membranes are beneficial
• Wonderbuilds Breather Membranes

What is a breather membrane used for?

A breather membrane is a layer that can be used in roofing systems. It needs to be fitted underneath the roof covering. It helps to reduce moisture in the roof. Breather membranes should be used in pitched roofing, not flat roofing.

What is the difference between a breathable membrane and a non-breathable membrane?

Breathable and non-breathable membranes keep water out and help prevent damp and mould, but the way that they manage moisture is different.

Breathable membranes let moisture inside the building to escape. They are waterproof, but the material has holes that let water vapour pass through and stop rain getting in. These membranes are a more modern option and are quite popular. They work well under slate or tile roofs, as long as there is good airflow above the membrane.

Non-breathable membranes do not let air or moisture to pass through. They are still used in construction but are better suited to roofs that already have ventilation in place. Because they are very strong and resistant, they are usually used in cold, ventilated pitched roofs. They should not be confused with vapour control layers (VCLs), which are installed on the warm side of insulation to limit moisture entering the building.

Why are breather membranes beneficial

• Helps prevent condensation
• Trapped moisture is able escape
• Can improve energy efficiency
• Reduces gaps and weak points in insulation
• Supports healthier indoor air
• Could potentially reduce the need for extra ventilation products, saving money

Wonderbuilds breather membranes

Wonderbuilds has breather membranes in different weights and lengths. They are available in 1 metre and 1.5 metre widths. The four weight options are 100g, 115g, 140g, and 160g.

Wonderbuilds also have other products in the pitched roofing range, including dry ridge kits and bitumen shingles. There are also plenty of options in the flat roofing range, including capsheets and underlays. Get in touch today to find out more.