When to Use a Breathable Membrane?

If you're planning to build or renovate a structure, it's important to consider using a breathable membrane.

 

If you're planning to build or renovate a structure, it's important to consider using a breathable membrane. Here, we'll discuss what a breathable membrane is, its working principle, and when it's best to use it.

 

What is a Breathable Membrane?

 

A breathable membrane is a thin layer of material used in construction as a protective layer against moisture. This layer allows moisture to escape while keeping the structure waterproof. This capability is because a breathable membrane is made of a porous material such as microporous polypropylene or PTFE (polytetrafluoroethylene).

Working principle of breathable membrane

 

The working principle of a breathable membrane is simple. The membrane allows water vapor contained in the structure to escape through its pores. However, it stops liquid water from entering. This is achieved due to the membrane's microporous structure, which is too small for water molecules to pass through but allows gas molecules to escape, such as moisture vapor.

 

When to Use a Breathable Membrane?

A breathable membrane is particularly useful in buildings in which there is a risk of condensation because of a temperature differential between the inside and outside. There are more specific uses of the breathable membrane as mentioned below:

 

1. Roofing

A breathable membrane helps to keep insulation dry and maintain its effectiveness in the roofing systems. In addition, the membrane helps to prevent water penetration of the roof, which can cause damage to the structure and the insulation.

 

2. Timber-framed buildings

Breathable membranes are used to protect timber-framed buildings. Wooden structures are sensitive to dampness, and if they remain moist over extended periods, fungal decay can occur. A breathable membrane is used to keep the moisture out of the structure while allowing any that is present to escape.

 

3. Basement waterproofing

The use of a breathable membrane in basement waterproofing systems is beneficial. The membrane stops water from penetrating the building while allowing moisture to escape. This stops any buildup of humidity within the structure, which can lead to mold and other issues.

 

4. External Walls

Breathable membranes are installed vertically in external walls between it and the external render or other cladding systems. The membrane functions to keep moisture out and at the same time, allowing moisture to escape from the internal side.

 

5. Cold roofs with insulation above the ceiling joists

In structures where the insulation of the roof has been installed above the ceiling joists, breathable membranes are laid above the insulation to prevent any condensation from occurring within the roof structure.

 

Having gone through the scenarios when to use breathable membranes, it's essential that you ensure that you buy quality products from trustworthy suppliers, such as {supplier}. If you require more information on what breathable membranes may be suitable for your project, please don't hesitate to contact us for expert advice.

 

Closing Thoughts

 

A breathable membrane is an innovative and effective solution for protecting your structure from moisture. It's necessary to use a breathable membrane in specific situations; basements, external walls, roofing and walls of timber-framed structures are just a few mentioned. The use of these products will help to extend the longevity of your building, so be sure to choose a reputable supplier like {supplier}. If you have any inquiries on breathable membranes, feel free to contact us for more information and expert recommendations.