Yes, the Cromar Vent 3 membrane can be used on walls.
Originally designed as a breathable roofing membrane, its versatility and performance make it an excellent choice for wall applications, particularly in timber frame construction or external wall systems.
When properly installed, it provides a robust barrier against water ingress while allowing moisture vapour to escape, helping to maintain the structural integrity of the building.
We are a leading supplier of this membrane in the UK - and it's often used on metal cladding projects..
Why Use Cromar Vent 3 on Walls?
The key advantage of using the Cromar membrane on walls lies in its dual functionality: protection from external moisture and facilitation of internal moisture escape.
This ideal balance ensures that walls remain dry and free from condensation, which is critical for the longevity of the structure.
Key Benefits:
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Moisture Management
Cromar Vent 3 is designed to allow vapour to pass through, preventing the build-up of condensation within the wall cavity. This makes it especially suitable for structures that need to breathe, such as timber frames. -
Weather Resistance
Acting as a secondary weatherproof layer, Cromar Vent 3 helps prevent water from penetrating the wall system, even in severe weather conditions. -
Durability
Manufactured from tough, tear-resistant materials, it ensures long-lasting protection during both construction and the life of the building. This is especially good for summer houses and barns. -
Ease of Installation
Its lightweight design and flexibility make Cromar Vent 3 straightforward to install, reducing labour time and costs.
Installation Tips for Wall Applications
For Cromar Vent 3 to perform effectively on walls, it’s essential to follow correct installation procedures:
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Orientation: Ensure the coloured side of the membrane faces outwards. This side is specially treated to resist water while allowing vapour to escape from within.
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Fixing: Secure the membrane using appropriate staples or nails, ensuring overlaps are consistent with building regulations. Taping the overlaps may also be advisable for enhanced water resistance.
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UV Protection: While Cromar Vent 3 can tolerate UV exposure for up to three months, it is best to cover it promptly with external cladding to maintain its durability and functionality.
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Compliance: Adhere to relevant building standards, such as BS 5534:2014, to ensure the membrane is installed in a way that meets regulatory requirements.
Applications in Wall Construction
Cromar Vent 3 is particularly effective in:
- Timber Frame Walls: It acts as a breather membrane, preventing water ingress while allowing the timber to breathe naturally. It is also ideal when used with corrugated metal roof sheets, which we also supply.
- Sheathing Walls: It provides an additional layer of protection beneath external cladding, helping to keep the wall cavity dry.
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Refurbishment Projects: Ideal for upgrading older buildings, it can be retrofitted to enhance moisture control and weatherproofing.
Closing Thoughts
Cromar Vent 3 is a versatile, high-performance solution for wall applications, offering excellent moisture control, weather resistance, and durability.
Whether you're working on a new build, a refurbishment, or a timber frame construction, this breathable membrane is a solid option. You may also use it with polycarbonate roofing sheets.
By following correct installation practices, Cromar Vent 3 can provide reliable, long-lasting protection for your walls.
