ITP Powerbase® Multigas Barriers are high specification multilayered reinforced LDPE gas barrier membranes for protection against CO₂, methane and radon.

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 the ITP Powerbase® Multigas.
• Membranes should be laid before any internal walls are built.
• Membranes should be protected using protection boards, or 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. Whilst pre-fabricated panels are normally supplied, continuity of membranes can be achieved by joining separate membrane panels or rolls by welding or taping. Welding is the preferred as it provides a stronger joint.
• 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.
• ITP Powerbond® D/S Jointing Tape Butyl 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 ITP Powerbond® S/S Sealing Foil Tape 1000 mm to provide improved protection.
• Concrete columns and masonry surfaces must be primed with ITP Powerbase® 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 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 ITP Powerbond® D/S Jointing Tape Butyl. The top hat base and top edge should be sealed with 75mm ITP Powerbond® S/S Sealing Tape Foil.
• 1000 mm ITP Powerbond® S/S Sealing Foil Tape should be used for corners and other detailing.
• Vent pipes should be sealed using ITP Powerbond® D/S Jointing Tape Butyl.
• Prior to laying the upper slab or floor screed the membrane should be inspected for damage.

See installation instructions for full details.

ITP Powerbase® Multigas Barriers are high specification multilayered reinforced LDPE gas barrier membranes for protection against CO₂, methane and radon.

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 the ITP Powerbase® Multigas.
• Membranes should be laid before any internal walls are built.
• Membranes should be protected using protection boards, or 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. Whilst pre-fabricated panels are normally supplied, continuity of membranes can be achieved by joining separate membrane panels or rolls by welding or taping. Welding is the preferred as it provides a stronger joint.
• 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.
• ITP Powerbond® D/S Jointing Tape Butyl 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 ITP Powerbond® S/S Sealing Foil Tape 1000 mm to provide improved protection.
• Concrete columns and masonry surfaces must be primed with ITP Powerbase® 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 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 ITP Powerbond® D/S Jointing Tape Butyl. The top hat base and top edge should be sealed with 75mm ITP Powerbond® S/S Sealing Tape Foil.
• 1000 mm ITP Powerbond® S/S Sealing Foil Tape should be used for corners and other detailing.
• Vent pipes should be sealed using ITP Powerbond® D/S Jointing Tape Butyl.
• Prior to laying the upper slab or floor screed the membrane should be inspected for damage.

See installation instructions for full details.

ITP Powerbase® Multigas Barriers are high specification multilayered reinforced LDPE gas barrier membranes for protection against carbon dioxide CO₂, methane and radon.

Features and benefits:

• Independently tested to ISO 15105-1.
• Compliant to BS 8485:2015.
• Reinforcement scrim.
• High tear and impact resistance.
• Available in rolls for joining on site.
• Available in a choice of two grades: ITP Powerbase Multigas 500 and Multigas 300.
• Multigas 500 is BBA Certified
• Full range of ITP Powerbase® accessories.
• Acts as a damp proof membrane.
• CE approved.

Accessories:

ITP Powerbond S/S sealing foil tape, 75 mm x 50 m:

Single-sided foil tape to seal outer laps on VOC and gas barrier membranes.

• Size 75 mm x 50 m.
• Colour: silver.
• Temp range: -20°C to +70°C.
• Installation range: +4°C to +35°C.

ITP Powerbond S/S sealing foil tape, 1000 mm x 20 m:

Single-sided foil tape for detailing. Seals top hats and corners.

• Size: 1000 mm x 20 m.
• Colour: silver.
• Temp range: -20°C to +70°C.
• Installation range: +4°C to +35°C.

ITP Powerbond D/S jointing tape butyl:

Double sided tape to seal inner laps on VOC and gas barrier membranes

• Size: 30 mm x 30 m/ 50 mm x 10 m.
• Colour: black.
• Temp range: -40°C to +70°C.
• Installation range: +4°C to +35°C.
• Thickness 1500 mm.

ITP Powerbase® Multigas Barriers are high specification multilayered reinforced LDPE gas barrier membranes for protection against carbon dioxide CO₂, methane and radon.

Features and benefits:

• Independently tested to ISO 15105-1.
• Compliant to BS 8485:2015.
• Reinforcement scrim.
• High tear and impact resistance.
• Available in rolls for joining on site.
• Available in a choice of two grades: ITP Powerbase Multigas 500 and Multigas 300.
• Multigas 500 is BBA Certified
• Full range of ITP Powerbase® accessories.
• Acts as a damp proof membrane.
• CE approved.

Accessories:

ITP Powerbond S/S sealing foil tape, 75 mm x 50 m:

Single-sided foil tape to seal outer laps on VOC and gas barrier membranes.

• Size 75 mm x 50 m.
• Colour: silver.
• Temp range: -20°C to +70°C.
• Installation range: +4°C to +35°C.

ITP Powerbond S/S sealing foil tape, 1000 mm x 20 m:

Single-sided foil tape for detailing. Seals top hats and corners.

• Size: 1000 mm x 20 m.
• Colour: silver.
• Temp range: -20°C to +70°C.
• Installation range: +4°C to +35°C.

ITP Powerbond D/S jointing tape butyl:

Double sided tape to seal inner laps on VOC and gas barrier membranes

• Size: 30 mm x 30 m/ 50 mm x 10 m.
• Colour: black.
• Temp range: -40°C to +70°C.
• Installation range: +4°C to +35°C.
• Thickness 1500 mm.