Ecohome Bank Holiday Banner

Order Before 2pm For Delivery on

Free Next Day Delivery


Orders £100+VAT. Excludes Bank Holidays.

Free Next Day DeliveryFree Next Working Day Delivery

Free Next Day DeliveryBeat The Energy Price Hike

YBS BreatherFoil FR For Walls

YBS BreatherFoil FR For Walls

Want it by ?

Order within for free next working day delivery throughout mainland UK, excluding bank holidays.

[onsite_messaging data-key="credit-promotion-badge" data-theme="light"]
expand_circle_down Description

Insulation and Venting Made Easy

YBS BreatherFoil FR for Walls is a thin and flexible 2 in 1 insulating and venting membrane, designed specifically for external walls including timber frame and modular buildings.

At only 4mm thick, this product replaces the need for a traditional breather membrane while insulating and without increasing the depth.

YBS BreatherFoil FR For Walls for Timber Frames can be installed in a factory scenario or on site by simply stapling the material directly onto timber OSB Boards allowing the reflective foil to face the external of the property.

We advise BreatherFoil to be overlapped by 75mm and the horizontal overlaps should remain untapped, to allow any moisture to dissipate. We recommend the vertical joints to be taped and sealed using Thermaseal Foil Joining Tape.

This product creates a totally draft and moisture free building during construction, and also when the project is complete!

Order BreatherFoil at the lowest trade pricing online. Order before 2pm and receive Free Next Working Day Delivery (To the UK Mainland) when spending over £100 + Vat.

Request a Call Me Back and one of our dedicated team members will call you within one hour!

Our BreatherFoil Trade Pallet Deal consists of the following;

  • 6 x BreatherFoil FR 1.35m x 50m (405m2)
  • 3 x ThermaSeal Foil Tape 75mm x 50m
  • Free Staple Gun and 5,000 14mm Staples
  • Free Next Working Day Delivery (when ordered before 2pm)

BreatherFoil FR is becoming increasingly popular in the Timber Frame market, it is a higher performing material than the following brands;

  • Reflex by Tyvek
  • TF200 Thermo by Protect
  • Reflactasheid TF 0.18 by Proctor

See our Fitting and Data Sheet below to see how BreatherFoil can assist in your upcoming projects.

BreatherFoil FR is commonly used in a system which is our Timber Frame Kit – See Link. Please also visit our Online U-value Calculator if you have a project going through building control.

Require an insulating breathable product for pitched roofs? Try our BreatherQuilt Multifoil Insulation!


Spend £500 + VAT and Choose a FREE GIFT at the checkout!

Free Gifts Include: Thermaseal Foil Joining Tape, Heavy Duty Staple Gun Kit, Multifoil Insulation Scissors or Thermaseal Double Sided Tape.

expand_circle_down How-To Videos

How to install BreatherFoil FR Insulation

expand_circle_down How-To Guides

How to install YBS BreatherFoil Insulation

  1. Preparing The External Wall For Insulation

    Prepare for the BreatherFoil installation by removing any Exisiting Cladding and exposing the OSB/Sarking board.

  2. Attaching The Initial Layer Of BreatherFoil

    Unroll the BreatherFoil Horizontally across the wall and staple it directly to the external timber boarding, at a minimum of 300mm intervals.

  3. Where A Vertical Joint Occurs

    Where a vertical joint occurs, ensure a minimum overlap of 100mm & seal using ThermaSeal Foil Joining Tape.

  4. Where A Horizontal Joint Occurs

    When rolling out the next roll above the first, horizontal joints need to be created, ensure a minimum overlap of 75mm, leaving the overlaps untaped.

  5. Attaching The Second Layer Of BreatherFoil

    Staple the BreatherFoil directly to the external timber boarding as before, at a minimum of 300mm intervals.

  6. Vertical Taping The Perimeter

    Once the wall is fully covered, begin to seal the vertical perimeter using ThermaSeal Foil Tape, leaving the top and bottom untaped.

  7. Install Timber Battens

    Apply a layer of timber battens (minimum of 25mm), perpendicular to the rafters at minimum intervals of 400mm.

  8. Install The External Finish

    Finally apply the external finish/cladding in accordance with the manufacturers certification, fixing instructions & good building practice.

expand_circle_down Reviews


There are no reviews yet

Add a review
Currently, we are not accepting new reviews
expand_circle_down Q&As

Does BreatherFoil FR breathe?

BreatherFoil is a venting membrane, meaning the material itself is not breathable. However, when the material is fitted, the horizontal overlaps are left un-taped. This allows breathability through the laps.

Is BreatherFoil FR Certified?

Yes, BreatherFoil FR is UK Manufactured, and is accredited by both BDA and STAS.

What is BreatherFoil equivalent to in PIR?

In a Wall, BreatherFoil FR has a certified R-value of 0.79. This results in our 4mm insulation being equivalent to 18mm PIR Insulation

Does BreatherFoil need to be fixed on a Plywood?

Yes correct, BreatherFoil FR must be stapled on a continuous timber board. The timber OSB/Plywood is to be fixed to the external of the stud, then followed by our insulation. We would not recommend stapling BreatherFoil directly on timber vertical studs.

Whats does FR Stand for?

FR stands for Fire Retardant. This means a chemical is added to the material to prevent the start or slow the growth of fire.

How is BreatherFoil FR fitted?

BreatherFoil FR is simply stapled directly on to timber plywood or OSB Boards. BreatherFoil is cut by using a craft knife or multifoil scissors. These items can be found in our Multifoil Insulation Fitting Kit.

Does BreatherFoil replace a standard breather membrane?

Correct, fitting BreatherFoil FR on the plywood sheathing replaces the required for a standard breathable membrane. Whilst being only 3mm thicker than a standard felt, it provides excellent additional thermal benefits.

expand_circle_down Specification
Length25m or 50m
Foil Emissivity0.05
Core R-value0.124m²K/W
Wall R-value0.79m²K/W

Key Features

  • Breathable and Insulating Bubble Membrane
  • Ideal Solution for Timber Frames
  • Highly Reflective True Aluminium Outer Layer
  • Removes risk of condensation
  • Greatly improve U-value without any additional depth
  • YBS BreatherFoil FR Can be used in conjunction with YBS SuperQuilt to avoid PIR Boards
  • BDA and STAS Approved
  • Fire Retardant
  • UK Manufactured – YBS Insulation

Downloads & Resources

picture_as_pdf Data Sheets Logo