Breathable Membrane in a Garden Room

When it comes to creating the perfect garden room, you want it to last. One often overlooked element in constructing a garden room is the use of a breathable membrane.

What Are Breathable Membranes?

garden room breathable membrane

A Breathable Membrane, also known as breathable felt or roofing underlay, are thin sheets of material that are installed between the outer cladding of your garden room and its structural framework.

They act as a shield, offering several benefits that can make a significant difference in your garden room’s performance.

Why Breathable Membranes Matter

Breathable Membrane
  • Moisture Management: Garden rooms are subjected to ever-changing weather conditions. Rain, snow, and humidity can all take their toll on the structure. A breathable membrane allows moisture vapor to escape while preventing water ingress. Protecting the interior from dampness and mold growth.
  • Condensation Control: Condensation can be a nightmare for any garden room owner. Breathable membranes play a vital role in minimizing condensation buildup by allowing the structure to breathe. reducing the risk of moisture-related issues.
  • Longevity: Your garden room is an investment, and you want it to stand the test of time. Breathable membranes can extend the lifespan of your structure by providing an additional layer of protection against the elements.

Choosing the Right Breathable Membrane

Not all breathable membranes are created equal, so it’s essential to select the right one for your garden room project. Consider factors such as:

  • Breathability: Ensure the membrane has the necessary breathability to handle your local climate conditions.
  • Durability: Look for membranes with strong tear resistance and UV stability.
  • Waterproofness: Opt for a membrane that provides excellent waterproofing capabilities.
Eurovent Breathable Roof Membrane
  • Breathable Roof Membrane/Felt

  • 1.5m x 50m (75 SQ/M)

  • 120 G/SM

Installation Process

Now that we understand why breathable membranes are crucial, let’s discuss how to use them effectively in your garden room construction:

garden room wrapped breathable membrane with rubber roof

Prepare the Framework

Before installing the membrane, ensure that the structural framework of your garden room is in place and properly sealed. Any gaps or vulnerabilities should be addressed.

Lay the Membrane

Roll out the breathable membrane over the exterior framework of your garden room. Ensure that it is stretched taut and covers the entire surface, with overlaps to prevent any potential gaps.

Secure in Place

Use appropriate fixings to secure the membrane in place. It’s crucial to follow the manufacturer’s guidelines for spacing and placement to ensure optimal performance.

What is the difference between a vapour barrier and a breathable membrane?

A vapour barrier and a breathable membrane are both used in the walls of a garden room, but, they have different roles:

  • A vapour barrier is used on the inner side of the insulation and is designed to stop moist air from passing through it and into the building structure.
  • A breathable membrane is used on the outer side of the building, under the cladding. Breathable membranes must repel water from the outside while allowing moisture from the inside to escape.


In the world of garden room construction, the importance of a breathable membrane cannot be overstated. It contributes to the overall longevity of your garden room.

When planning your garden room project, don’t overlook this critical component. With the right breathable membrane in place, your garden room will stand strong against the elements for years to come.

Frequently asked questions

Is a breathable membrane necessary for all types of garden room designs?


What is the purpose of a breathable membrane in a garden room?

A breathable membrane serves as a protective layer that allows moisture vapor to escape while preventing the entry of liquid water. This helps protect the garden room.

Can I use a breathable membrane in all weather conditions?

Yes, breathable membranes are beneficial in various climates. They effectively manage moisture levels, making them suitable for both rainy and humid environments.

Share This :

Garden Room Plans

New and improved !

Digital Plans for various sizes of Garden rooms.

  • Detailed plans
  • List of all materials
  • Material quantity and price
  • Links to each item