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Fireshield Permeable Walling Underlay - 20m x 1.1m Roll

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£398.50 Incl. VAT
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The Fireshield Permeable Walling Underlay with an intumescent coated surface is suitable for all walling applications, including those in multiple storey buildings. The underlay’s intumescent coating helps protect the substrate by reducing the risk of fire taking hold and significantly reduces the formation of droplets and smoke.

It is installed and fixed to the substrate in the same manner as standard breather membranes using mechanical fixings. Install the underlay by fixing directly to the substrate ensuring vertical laps are staggered. Fireshield must be secured with fixings that are appropriate to the substrate and consideration should be made of the fire performance of the fixings.

Please note that fixing centres should be no more than 450mm.

Features and Benefits

  • The unique intumescent coating helps protect the substrate
  • Vapour permeable walling underlay for use either directly onto sheathing or insulation
  • Suitable for applications over 18m high (11m in Scotland)
  • BBA, LABC & LABSS Certified

Product Specifications

Length: 20m

Width: 1100mm

Thickness: 1.2mm

Reaction to Fire: EN13501-1   B,s1,d0

UV Resistance: 3 months

Water Vapour Transmission: Sd=0.08m


Length 20m Thickness 1.2mm Width 1100mm


Permeability Vapour Permeable Roll Size 22m2

Questions & Answers


We have framed( 89mm x 38mm CLS) 5 No kit houses ready to take Fire Rated timber cladding .We now cannot get the FR cladded due to the current issues . Is your product an option to comply with current regs in Scotland . Appreciate better fixed to OSB but as battens fixed can it be fixed to same?


We would recommend asking building regulations or the manufacturer for this answer.

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