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Permavent Envirotect Class B Fire Membrane - B-s1,d0 Fire Rated Walling Membrane

Verified by manufacturer 1 month ago

Permavent Ltd

A class B-s1,d0 fire rated membrane designed and developed for use in timber frame, light steel gauge and modular buildings, providing high vapour permeability and superior water resistance.

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Application

Can be used in all walling applications and has been specifically designed and developed for use in timber frame, light steel gauge, modular building and high rise construction. 

Description

A class B-s1,d0* fire rated membrane for use in walls.


Features and benefits:

  • Provides high vapour permeability (0.07 Sd to BS EN 12572) and superior water resistance (class W1).
  • UV and heat resistant.
  • Can be used in all walling applications and has been specifically designed and developed for use in timber frame, light steel gauge, modular building and high rise construction. 
  • Delivers first line protection to the external of the building during construction against driving rain, and wind-blown snow providing protection to the interior of the building.
  • The high water vapour permeability provided ensures water vapour can pass through the structure safely into a vented cavity.
  • Can be paired with Envirotect AVCL 150 Reflect (specified separately).


*Note that class B-s1,d0 fire rating requires the substrate directly behind the membrane to be class A.


To be fitted on the cold side of the building insulation in accordance with NHBC and BM TRADA recommendations and the manufacturers instructions.

General information

Color

Black

Material

Polypropylene

Shape

Rectangle

Guidance for specification option:

Supplied in rolls.

Length

50000 mm

Width

1500 mm

Uniclass

Pr_25_57_10_94 Vapour-permeable sheetsPrimary

CAWS

H22/20 Breather membrane

H22/130 Breather membrane

H20/10 Sheet cladding

H20/155 Sheet cladding (attached to timber battens)

H21/20 Breather membrane

H21/130 Breather membrane

H30/350 Breather membrane

H30/50 Breather membrane

H31/280 Breather membrane

H31/55 Breather membrane

H92/785 Breather membrane

P10/320 Breather membrane

P10/65 Breather membrane

Specification data - Vapour-permeable sheets

Standard

To BS EN 13859-1.

Performance characteristics

Reaction to fire, to EN 13501-1, class B-s1,d0.
Water vapour resistance (Sd): 0.07 m.
Nail tear resistance, to EN 12310-1 (MD/ CD): 120/ 140 N/50mm.
Tensile strength, to BS EN 12311-1 (MD/ CD): 200/ 140 N/50mm.
Flexibility at low temperature: To EN 1109:2013, <-40°C.

Guidance for specification option:

  • Reaction to fire requires substrate directly behind the membrane to be class A.
  • MD: Machine direction; CD: Cross direction.

Class (minimum)

W1.

Material

Manufacturer's standard.

Guidance for specification option:

Consult manufacturer for details.

Form

Manufacturer's standard.

Guidance for specification option:

Consult manufacturer for details.

Weight (minimum)

115 g/m².

Thickness (minimum)

Manufacturer's standard.

Guidance for specification option:

Consult manufacturer for details.

Reflective face

Manufacturer's standard.

Guidance for specification option:

Consult manufacturer for details.

Roll size

50 x 1.5 m.

Guidance for specification option:

Length x width.

Sustainability data

Contains Red List materials

No

Country of material origin

United Kingdom

Country of product manufacture

United Kingdom

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