GP® LAP TAPE is an adhesive aluminium foil tape designed for sealing joints of JUTA gas barriers. The GP® LAP TAPE is single sided, with release film on one side. GP® LAP TAPE is designed to prevent the passage of water, water vapour, air and gas, for use in building construction with damp proof membranes, vapour control layers and ground gas barriers.

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Product Benefits

JUTA GP® LAP TAPE is compatible with our full range of waterproof and gas barriers, including:

  • GP®1
  • GP®2
  • GP®H (SAM)
  • GP® Top Hats and Preformed Corners
Product Description

GP® LAP TAPE has excellent adhesion to all JUTA gas barriers, and a wide range of substrates. The flexible composition of the GP® LAP TAPE makes it highly conformable to irregular surfaces, and it is easy and accurate to use with little to no waste. GP® LAP TAPE has unrivalled levels of adhesion to the gas barriers and is designed to remain flexible throughout the service

CharacteristicsTest MethodUnit
ThicknessEN 1849-20.2 mm
WidthEN 1849-275 mm
LengthEN 1849-250 m
Packaging16 rolls/box (50 boxes/pallet)
CharacteristicsTest methodUnit
Peel Adhesion to GP® Membrane Modified PSTC750 N/m
Application TemperatureAbove - 5o C
Radon TransmittanceSP 38731.7 x 10-8 m/s
Methane Permeation ISO 15105-1<40 ml/m2 /day/atm

Application temperature range is -5 to +40oC. Prior to application, all surfaces should be clean, dry and free from frost, grease and loose detritus materials. Apply direct from the reel onto the surface and press along the whole application length to achieve optimal adhesion. JUTA recommends the use of a silicon roller for optimal pressure application to taped joints.

GP® LAP TAPE has a shelf life of approximately 24 months when stored flat in original packaging in cool, dry conditions.

Site Investigation
Site Investigation
Site Investigation Reports Monitoring Results. We review these reports and advise routes for compliance.
System Design
System Design
Full Ground Gas Protection System Design available.
Wide library of standard details with site specific details on request.
All our installers are certified NVQ Level 2 qualified installation contractors.
We ensure your project complies with the relevant building regulations.

Ground Gas Standards

There are many different standards and guidance documents that detail how to understand the risk of ground contamination, and design solutions to mitigate these risks. The different documents relate to different ground contamination. Below are some of the key documents to be aware of and refer to:

BS 8485:2015+A1:2019 – Codes of practice for the design of protective measures for methane and carbon dioxide ground gases for new buildings.

  • Ground gases typically found near landfill sites, but can occur from other sources
  • Encourages the use of qualified installers
  • Validation to Ciria C735 is a requirement
  • Additional influences on the system should be considered, such as the hydrostatic conditions, and the likelihood of the source contaminant being in direct contact with the protective measures proposed
GP<sup>®</sup>  LAP TAPE

BRE 211:2015 – Guidance on protective measures for new buildings. (RADON)

  • Naturally occurring ground gas. Larger concentrations in the South-West of UK
  • Minimum recommendation is a membrane of 300 micrometre (1200 gauge) polyethylene sheet or equivalent
  • It must be installed with considerable care and protected once installed
  • Taped laps are required
GP<sup>®</sup>  LAP TAPE

CIRIA C748:2014 – Guidance on the use of plastic membranes as VOC vapour barriers

CIRIA C682:2009 – VOC Handbook

  • Risk-based approach
  • No quantifiable limits on material performance
  • Testing to ISO 15105-2 and EN 14414/EN 14415
  • 9 main VOC types are tested for
  • Welded laps are required as most tapes are made from bitumen/butyl and are affected by VOCs
GP<sup>®</sup>  LAP TAPE

CIRIA C735:2014 – Good practice on testing and verification of protection systems to buildings from hazardous gases

  • Good practice on testing and verification of protection systems to buildings from hazardous gases
  • Check design and detailing is in accordance with site requirements
  • Checks the competency of the installer (NVQ LEVEL 2 minimum)
  • Test integrity of the membrane/barrier system
  • Visual inspection
  • Written report on inspection/testing and sign-off

BS8102:2009 – Code of practice for protection of below ground structures against water from the ground

GP<sup>®</sup>  LAP TAPE

JUTA Solutions & Applications

Our gas protection membranes suit a variety of applications and situations, with our TITAN® range offering not only gas protection but also having superior waterproofing and invasive weed control qualities.

BRE 211 NHBC (Amber 1) BS8485:2015 + A1 2019 / NHBC (Amber 2) C748 C748 BS8102:2009 RPS178 C753 BBA Agreement Certificate
Radon Bulk Ground Gasses Cardbon Dioxide and Methane VOC Vapour Permeation Hydrocarbons Immersions TYPE-A Bonded Waterproofing Invasive Weed Control SuDs Impermeable Membrane
GP®H 0.6mm

Get In Touch With The Experts

If you feel first class service, premium products direct from source, and bespoke solutions are right for you then don't hesitate to contact our team today on 01772 754177 or email us at [email protected]

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