POWERBASE® Gas and chemical barriers

Powerbase Multigas Barrier

Powerbase Multigas Barriers

A premium multilayer reinforced LDPE gas barrier membranes for radon, methane and CO2.

  • Independently tested to ISO 15105-1
  • Compliant to BS 8485:2015
  • CE Marking
  • High tear and impact resistance
  • Available in rolls for joining on site
Datasheet
Multigas 500 Datasheet
Installation Instructions
Brochure

Multigas 500

  • Compliant to BS 8485:2015 + A1:2019
  • Independently tested to ISO 15105-1
  • CE Marking
Powerbase Multigas SA tanking membrane

Multigas SA

  • self-adhesive tanking membrane
  • incorporating a bituminous backing for easy vertical installations
  • specifically designed for vertical installations
  • CE marking
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HIGH PERFORMANCE BARRIER MEMBRANES

The next generation innovative engineered barrier membrane

Powerbase® is a range of geosynthetic barrier membranes for protection against
naturally occurring hazardous gases and soils contaminated with hydrocarbons or
toxic industrial pollutants. They are also used for groundwater and environmental
protection installations. Gas barriers are necessary wherever there is a risk of naturally occurring radon or methane gas. Radon is commonly found over granite formations, whereas methane and CO2 is produced as a result of the decomposition of organic matter such as made ground or natural deposits of coal, peat or silt. Developments on brownfield sites require effective gas barriers to prevent harmful gases, hydrocarbons and volatile organic compounds (VOCs) from permeating into buildings. Typically, an impermeable barrier is designed in the foundations of the building over a ventilation layer. Hazardous gases and VOCs migrate up through the soil and collect under the membrane in a sump from where they are vented and safely dispersed into the atmosphere. The principal function of the gas barrier membrane is to prevent harmful gases from entering the building through cracks, construction joints and service openings in the floor slab. The membrane should cover the whole plan area of the structure to all external faces in order to seal both the ground slab as well as any cavity walls and voids in hollow concrete block work. Special consideration should be given to sites contaminated by hydrocarbons or VOCs. These are very mobile compounds and will migrate relatively easily through unsuitable membrane materials. Aluminium laminates are superb gas barriers but these materials will delaminate when exposed to hydrocarbon vapour/VOCs; further, the aluminium layer is susceptible to oxidation due to moisture penetrating into exposed edges. A comprehensive range of task-specific engineered barriers and accompanying accessories provide consultants and design engineers effective barrier solutions and for the contractor a rapid, simple and cost-
effective installation. Comprehensive CAD drawings, product data sheets, technical briefing documents, case studies and MSDS/COSHH safety information are available on our website (for registered users) or by contacting our Technical Department.

POWERBASE VOC SOFTWARE

The Powerbase VOC software application is a unique, simple-to-use web-based app which provides performance data for a wide range of harmful chemicals. The app is free for use by design and environmental engineers as part of the site risk assessment. Contact ITP Ltd for access to this app providing high performance data output.

PERFORMANCE DATA

Powerbase® Multigas Barriers are multilayer reinforced LDPE gas barrier membranes for radon, methane and CO2. They incorporate an aluminium layer that is protected by a separate coating

PRODUCT

Colour Weight/Thickness Tensile Strength Nail tear resistance Elongation Accreditation /
Compliance
Gas permeability Temperature range Water Vapor resistance Sizes Roll weight Pallet quantity

Powerbase
MULTIGAS
300

Silver/
Green

0.4 mm
270 gsm

MD 290 N/mm
XD 300 N/mm

MD 260
XD 265

MD 19
XD 20

BS8485:2015

Methane:
0.041 ml/day/m2
/ATM

CO2: 0.195 ml/day/m2

/ATM EN ISO 15105-1 & ASTM D1434
Radon: <7.2×10-12m2
/s

-40 to +70

0.01gsm/day
EN 1931
EN 12572(c)

2.0 x 50

28

33

Powerbase
MULTIGAS SA
Silver/
Black
0.75 mm
750 gsm
MD 800 N/mm
XD 800 N/mm
NT MD 5

XD5

BS8485:2015 BRE Report 414
EN ISO 15015-1
-20 to +70 Pass

EN 1928

1.08 x 30 30.5 23
Powerbase
MULTIGAS 500
Silver/
Green
0.5 mm
370 gsm
MD 370 N/mm
XD 347 N/mm
MD 295
XD 341
MD 22
XD 16
BS8485:2015+
A1:2019
BBA Cert 21/5895
Methane:
0.041 ml/day/m2
/ATM CO2 0.195 ml/day/m2/ATM EN ISO 15105-1 & ASTM D1434

Radon: 7.2×10-12 m2/s

-40 to +70 0.01gsm/day
EN 1931
EN 12572(c)
2.0 x 50 38 33

Multigas Projects

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