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Supro - Breathable roof underlay

Third party certifications:
  • BBA Agrément Certificate

    Certificate type

  • QA Certificate

    Certificate type

DuPont Tyvek

Type LR underlay to BS 5250.

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+44 (0)844 4068722 www.construction.tyvek.co.uk

Water resistant, vapour permeable, reinforced heavyweight membrane, for secondary external protection of rainscreened walls, tiled or profiled metal roofs and suspended timber floors.

  • Type LR underlay to BS5250.
  • Suitable for use supported or unsupported, in pitched roof assemblies.
  • Suitable for use in pitched roof assemblies without eaves or ridge ventilation.
  • Suitable for use in warm, hybrid or cold roofs.
  • Spunbonded polyethylene and polypropylene composition.
  • Water vapour permeability (to BS 3177): ≤935 g/ m²/ day.
  • Head of water sustained without penetration (to BS 20811): 2 m.
  • Nail tear resistance (to EN 12310_1): 180N.
  • Flammability (to DIN 4102): B2.
  • Complies fully with BS5534:2014, Annex A, for UK Wind Zones 1-5.


150 mm.

General information

Textured fabric


Light grey


Water resistant, breathable, strong, integral tape


Polyethylene and polypropylene




1.0 x 50 m and 1.5 x 50 m


10 years

Uniclass 2015 Vapour permeable sheets (Pr_25_57_10_94)
Specification data
Product Reference

Tyvek® Supro

Roll size

1 x 50 m

1.5 x 50 m

Contractor's choice


Tyvek 2060B Tape

Tyvek® Double Sided Acrylic Tape

Tyvek® Butyl Tape

Standard product features


  • Thickness: 0.45 mm.
  • Weight: 145 g/ m².

Product Options


- Tyvek 2060B Tape

Single sided tape for sealing overlaps in Tyvek® membranes and making good around penetrations, pipework, windows and door openings. Very durable ensuring long term performance. Roll size: 75mm x 25m.

Double sided. For sealing to masonry, metal, plastics or wood, at laps or perimeters.

- Tyvek® Double Sided Acrylic Tape

Double sided acrylic tape for sealing laps in Tyvek® membrane and bonding to smooth surfaces. Excellent adhesion properties under extreme conditions. Strong initial tack. Roll size: 50mm x 25m.

- Tyvek® Butyl Tape

Double sided butyl based sealant, used to seal fixing penetrations in a Tyvek® membrane and form a moisture and airtight seal between a Tyvek® membrane and most commonly used building materials. Tape is compatible with brickwork, blockwork, masonry, timber, metalwork and most plastic products. Roll sizes: 20mm x 30m, 50mm x 30m.

Digital objects
PlatformCompatibleVersionCertified to
Revit 2016 6 2.0
IFC2X3 5 1.3
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