Breather-Foil FR

Specially developed for use in timber-frame and modular building constructions, YBS BreatherFoil FR can greatly increase the U-Value of a timber-frame wall and outperforms traditional breather membranes.

Whether pre-fabricated or assembled on site, BreatherFoil FR can afford the designer and contractor maximum flexibility when detailing timber-frame walls or dormer cheeks, without the expense of thicker timber frames or higher priced materials.

The unique design of BreatherFoil FR allows the application to breathe while offering an improved thermal performance.

The core bubble profile of the product offers great thermal benefits – this is achieved by trapping air within the small bubble pockets of the product.

The outer aluminium foil layers increase the overall thermal performance – this is due to its high reflectiveness.

This product is suitable for walls and offers the following major benefits

R-Value up to 0.791 m²K/W, equivalent to 35mm of mineral fibre insulation

Effective 2 in 1 insulating venting membrane

Up to 42% reduction in heat loss, saving you money on your energy bills

3.7mm thick and 2 layers

Suitable for timber frame and dormer walls

Non-degradable maintaining thermal performance and product integrity

Flexible, lightweight and easy to install

Reduces the risk of condensation

Minimal waste compared to traditional insulation products

Fully Agrément Certified, Building Control compliant and NHBC accepted

Made in Britain

BreatherFoil FR has been independently tested and certified to the latest Industry Standards, including BDA Kiwa certificate of Agrément.

YBS Insulation at a glance

YBS Insulation


Years Manufacturing Insulation



Metres of insulation manufactured per year

More than


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