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Powerbase® Low Perm - Gas Barrier Membrane For Protection Against Radon & Low Levels of Carbon Dioxide CO₂ - Gas Barrier Membranes

Verified by manufacturer 2 months ago

Industrial Textiles & Plastics Ltd Product certifications:
  • CE Marking

    Certificate type

Powerbase® Low Perm is a high performance gas barrier membrane providing effective protection against radon, low levels of carbon dioxide CO₂ and methane.

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Application

Powerbase® Low Perm is an extruded membrane for low permeation installations Powerbase® Low Perm protects radon and low levels of carbon dioxide CO₂ and methane.

Storage and handling:

Store in dry, cool conditions, away from direct sunlight. Handle with care to avoid any scuffing or punctures.

Installation:

  • Installation should be performed in conjunction with the design details.
  • The membrane should not be exposed to sunlight or weathering for prolonged periods. In cooler periods the barrier becomes less supple and installations should be avoided whenever temperatures fall below 5°C.
  • Make sure that no damage occurs when laying Powerbase® Low Perm.
  • Membranes should be laid before any internal walls are built.
  • Membranes should be protected using protection boards, sheeting over the whole area, or by immediately laying the upper slab or floor screed.
  • Panels should be installed on a layer of level sand or concrete blinding across the whole floor area.
  • Joins should only be made where the barrier is supported.
  • Membranes should be laid loosely and not pulled taut. Rolls or panels may be joined by either taping or welding.
  • Powerbond® Butyl Tape should be used within a 150 mm overlap. All joins should be firmly pressed together using a hand-held pressure roller.
  • Additionally for methane protection, 75 mm Powerbond® Foil Tape must be used to seal the overlap.
  • All corners of the membrane should be sealed with Powerbond® Single-sided Detailing Tape 1000 mm to provide improved protection.
  • Concrete columns and masonry surfaces must be primed with Powerbond® Primer before sealing.
  • If reinforced concrete is being used, the wire reinforcements must be positioned so that they do not come into contact with the gas barrier.
  • Gas tight seals are required around service penetrations.
  • Top hats should be used for sealing around pipes. Top Hats should be sealed to the membrane and pipework using Powerbond® Butyl Tape. The top hat base and top edge should be sealed with 75 mm Powerbond® Foil Tape.
  • 1000 mm Powerbond® Single-sided Detailing Foil Tape should be used for corners and other detailing.
  • Vent pipes should be sealed using Powerbond® Butyl Tape.
  • Prior to laying the upper slab or floor screed the membrane should be inspected for damage.

Description

Powerbase® Low Perm is a high specification extruded gas barrier membrane for protection against radon and low levels of Carbon Dioxide CO₂ and methane.

Features and benefits:

  • BBA certified.
  • Independently tested to ISO 15105-1 manomeric test method for methane and CO₂.
  • Available in 4 m x 12.5 m rolls for joining on site.
  • Full range of Powerbase® accessories.
  • Acts as a damp proof membrane.
  • NHBC Green & NHBC Amber 1.
  • CE approval.

General information

Color

Yellow

Finish

Smooth

Material

Low density polyethylene (LDPE)

Shape

Other

Guidance for specification option:

Roll.

Length

20000 mm

Width

4000 mm

Height

0.4 mm

Uniclass

Pr_25_57_65_60 Plastics sheetsPrimary

CAWS

J40/35 Loose-laid plastics or rubber gas-retardant membranes

J40/140 Loose-laid plastics or rubber sheet gas-retardant membranes

J40/20 Loose-laid plastics or rubber sheet damp-proofing

J40/120 Loose-laid plastics or rubber sheet damp-proofing

J40/30 Loose-laid plastics or rubber sheet oversite damp-proofing

J40/130 Loose-laid plastics or rubber sheet oversite damp-proofing

Specification data - Plastics sheets

Material

Low-density polyethylene (PE-LD).

Purpose

Gas retardance.

Standard

To BS 8485.

Third-party certification

British Board of Agrément (BBA) certificate.

Manufacturer guidance

BBA Cert. 20/5837.

Performance characteristics

-

Tensile strength (minimum)

20 N/mm².

Elongation to break

500%.

Resistant to underground gases

Radon, methane and CO².

Guidance for specification option:

Gas permeability:

  • Radon: 7.2×10⁻¹²m²/s.
  • Methane: 216 ml/m²/day.
  • CO2: 952 ml/m²/day EN ISO 15105-1.

Water vapour resistance (minimum)

0.03 ml/day/m².

Form

Extruded.

Physical properties

-

Colour

Yellow.

Weight (minimum)

372 g/m².

Dimensions

-

Thickness (minimum)

400 µm.

Width (minimum)

4 m.

Roll length (minimum)

20 m.

Sustainability data

Contains Red List materials

No

Material

Low density polyethylene (LDPE)

Recyclability

Suitable for waste to energy

Product certifications

CE Marking

CE Marking

Powerbase® Low Perm Gas Barrier - CE Marking

Literature

Powerbase® Gas Barriers

Powerbase® Gas Barriers

Powerbase® VOC & Gas Barrier SDS R5-0 - Lowperm

Powerbase® VOC & Gas Barrier SDS R5-0 - Lowperm

Powerbase® Lowperm Inst R4-0

Powerbase® Lowperm Inst R4-0

Powerbase® Low Level Gas DoP R4-2

Powerbase® Low Level Gas DoP R4-2

Powerlon® Product Catalogue

Powerlon® Product Catalogue

Powerbase Gas Barriers TDS

Powerbase Gas Barriers TDS

Powerbase® VOC TDS R5-2

Powerbase® VOC TDS R5-2

Case studies

Amberley Park, The Cotswolds

Amberley Park, The Cotswolds

Lindley Park Residential Project, Huddesfield

Lindley Park Residential Project, Huddesfield

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