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GP1 SAM

JUTA GP^®1 SAM gas protection self-adhesive membrane is a bituminous gas-proof and waterproof sheet. It is used for the gas/ waterproofing of underground structures where harmful ground gases are anticipated and as a self-adhesive accessory to GP^®1.

High quality reinforced membrane.
Low permeability to hydrocarbon and VOC vapours, carbon dioxide, methane and radon.</li
Complies with latest codes of practice as published by the BRE, CIRIA and BSI (BS 8485).

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Product Description

GP^®1 SAM gas protection self adhesive membrane, is a bituminous gas proof and water proof sheet, composed of self-adhesive SBS polymer modified bitumen incorporating GP^® 1 with an upper surface finish of black reinforced LDPE, and a lower surface finish of siliconized release film. GP^®1 SAM is used for the gas/waterproofing of underground structures where harmful ground gasses are anticipated, and as a self adhesive accessory to GP^® 1.

Self adhesive membranes are bituminous membranes, composed of self-adhesive SBS polymer modified bitumen incorporating an upper membrane element, and a lower surface finish of siliconized release film. The type of SAM is dependent on the application scenario as prescribed below, and they are generally used for the gas/waterproofing of underground structures where harmful ground gasses are anticipated, and as a self-adhesive accessory to GP^® membrane systems.

Specifications

General Information

Finish	Smooth
Color	Black
Material	Polyethylene
	Polymer
	SBS polymer-modified.
Shape	Rectangular - supplied in roll form.
Size	0.9 x 20 x 1.2 mm
Warranty Description	60 year
Uniclass 2015	Pr_25_57_08_08
CAWS	J40/45 Self-adhesive bitumen gas retardant damp proofing/ tanking
	J40/40 Self-adhesive bitumen damp proofing/ tanking
	J40/190 Self-adhesive bitumen damp proofing/ tanking
	J40/180 Self-adhesive bitumen gas retardant damp proofing/ tanking
Product Range	Gas Barriers

Specification data - Bitumen sheets - enhanced data

Standard	To BS 8485, BS 8102, CIRIA C735.
Third-party certification	CE certified to EN 13967+ A1.
Form	Bitumonous gas and water proof sheet.
Material
Carrier material	High-density polyethylene (HDPE).
Bitumen modification	SBS polymer-modified.
Gas inhibitor	Aluminium foil.
Weight (minimum)	1100 g/m².
Thickness (minimum)	1 mm.
Surface finishes
Top	White cross laminated high-density polyethylene.
Underside	Siliconized paper release film.
Width (options)	300 mm.
	900 mm.

Physical Properties

Characteristics	Test Method	Unit
Thickness	EN 1849-2	1.2 mm
Width	EN 1849-2	0.9 or 0.3 m
Length	EN 1849-2	20 m
Weight	EN 1849-2	1100 g/m²

Hydraulic Properties

Characteristics	Test method	Unit
Watertightness	EN 1928	PASS
Water Vapour Transmission	EN 1931	0.013 g/m²/day

Mechanical Properties

Characteristics	Test Method	Unit
Tensile Strength (MD/CMD)	EN 12311-2 (A)	500 N/50mm
Elongation (MD/CMD)	EN 12311-2 (A)	> 12 %
Resistance to Static Load	EN 12370	20 kg
Joint Strength	EN 12317-2	> 30 N
Durability and Water Tightness (Ageing and Chemicals) 60 kPa	EN 1847	Pass
Resistance to Nail Tear (MD/CMD)	EN 12310-1	> 300 N
Resistance to Fire	EN 13501	F Euro Class

Gas Permeability

Characteristics	Test Method	Unit
Methane Permeability	EN ISO 15105-1	< 0.68 ml/m²/day/atm
Carbon Dioxide Permeability	EN ISO 15105-1	< 2.81 ml/m²/day/atm
Radon Permeability	K124/02/95	8.0 x 10^-15 m²/S

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Applications

Can be used on any site in accordance with BS8485:2015 and NHBC requirements where carbon dioxide, methane or radon is present up to and including CIRIA 665 SITUATION 6. The barrier is sufficiently resistant to the ingress of harmful gasses into a building. On more heavily contaminated sites a passive or active venting system may be required to dilute the gasses down to acceptable levels and specific design advice should be sought.

JUTA UK – radon, ground gas, vapour, air and moisture barrier characteristic properties:

High Chemical Resistance
High resistance to Ground Gasses
Long Term Durability (Performance guaranteed for the lifetime of the building)
Compatible with all building materials
Manufactured to meet the most up to date British Standards and guidance.

GP^®1 SAM should be installed in accordance with the product installation guidelines, and in accordance with BS 8485:2015, and/or BS 8102:2009. It is recommended that GP^®1 SAM is not applied in temperatures below 10^oC, in colder weather the material can be warmed slightly to aid adhesion.

Standard Details

A selection of standard details for information and education purposes only. Note - it is strongly advised appropriately qualified, and insured personnel undertake gas membrane installs. A gas membrane performs a critical function in the application setting and has an anticipated design service life in excess of 60 years. Do not attempt to install gas membranes from these details alone. Sole rights for use and distribution are owned by JUTA UK LTD.

GP<sup>®</sup>1 SAM Installation Guidance

GP^®1 SAM
Installation Guidance

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Handling & Storage

Roll weights can be in excess of 20 kg (approx 33 kg/roll) and hence appropriate care and equipment is required for unloading and handling. This product is non-toxic nor flammable.

Rolls of GP^®1 SAM should be stored on in a cool, dry place, and be protected from exposure to rain, sun, heat and cold temperatures prior to installation. Exposure to sunlight for extended period of time could cause difficulty with removal of the release film.

Compliance & Certifications

CE Mark - EN13967:2012 + A1:2017 Type (A/T)

BS 8485:2015 Compliant (Methane and Carbon Dioxide Barrier)

BIM Objects

BIM objects are digital descriptions of products or materials that, when combined with other BIM objects create a Building Information Model. These downloadable files can be used for these purposes.

Download from NBS National BIM Library

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3D Technical Drawings

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Site Investigation

Site Investigation Reports Monitoring Results. We review these reports and advise routes for compliance.

System Design

Full Ground Gas Protection System Design available.

Specification

Wide library of standard details with site specific details on request.

Installation

All our installers are certified NVQ Level 2 qualified installation contractors.

Validation

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:

Methane (CH4) and Carbon Dioxide (CO2)

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

Radon (Rn)

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

VOCs & Hydrocarbons

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

General

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

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	BBA Agreement Certificate
GP^®1
GP^®2
GP^®4
GP^®5
GP^®H
GP^®L
GP^® TITANFLEX
GP^® TITANBOND
GP^® TITANTANK
GP^® LIQUID BARRIER
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 info@juta.co.uk

GP1 SAM

Product Benefits

Cavity Wall

Lift Pit

Penetration Detail

Pit Detail

RC Slab

Retaining Wall

Vertical to Horizontal

Additional

CE Mark - EN13967:2012 + A1:2017 Type (A/T)

BS 8485:2015 Compliant (Methane and Carbon Dioxide Barrier)

Ground Gas Standards

JUTA Solutions & Applications

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