INNOVATION BUILT ON EXPERIENCE
COMPLETE GAS MEMBRANE & VENTING SYSTEM for methane, carbon dioxide & radon gases
METAL ROOFING CONSTRUCTION MEMBRANES THERMAL INSULATION GEOSYNTHETIC ENGINEERING ACOUSTIC INSULATION VIBRATION ISOLATION TIMBER CLADDING
INNOVATION BUILT ON EXPERIENCE
THE A. PROCTOR GROUP TECHNICAL SUPPORT Choosing the best products for your project Choosing the right products for your specific requirements is made easy with our extensive range of gas protection materials. All products are carefully chosen and developed to ensure that the right material is available for your application. Most materials have independent testing or validation ensuring that they are capable of performing the function for which they are specified. Our range ensures that whatever your requirement, a solution is available. A comprehensive advice service Whatever your requirement our team of highly trained specialists at Head Office Techdesk and our in the field Specification Team, provide technical advice to assist in all aspects of the design process. From recommending what level of protection is required for your particular site, through selection of suitable materials, and working with you to ensure that all elements of the system are covered. Our services include: • Guidance on statutory requirements • Provision of CAD details • Assistance on design • CPD Presentations A. Proctor Group Head Office (The Haugh Blairgowrie)
Industry expertise In order to provide a complete service we have developed relationships with strategic partners including: • Consultants specialising in validated system designs • Approved installation sub-contractors Using these partners Proctor Group Geoengineering can offer a full range of solutions for building protection including. • Designed Solutions with PI design liability. • Installation through approved A. Proctor Group sub-contractors. • Design, Supply, Install and Warranty ‘Turnkey’ solutions
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Please contact us to discuss your specific project requirements.
CHOOSE THE BEST PRODUCTS FOR YOUR PROJECT [extensive range of gas protection materials]
CAREFULLY CHOSEN AND DEVELOPED [ensuring that they are capable of performing the function for which they are specified]
HIGHLY TRAINED SPECIALIST ADVICE [providing technical advice to assist in all aspects of the design process]
THE NEED FOR A GAS PROTECTION SYSTEM Why the need for gas protection measures? Current legislation stipulates the hazards of landfill gas (and its individual components) must be taken into account when designing and constructing developments. Landfill or naturally occurring gas (or its components) can enter buildings through: • • • •
Gaps around service pipes Construction joints Wall cavities Cracks in walls and ground slabs
In most buildings the gas protective measures are constructed below the ground floor level. The protection consists of a number of individual elements, which combine to form an integrated gas protection system. The most commonly used components in a passive gas protection system are: Primary protection This consists of various components which when put together provide a venting system to introduce sufficient fresh air to the underside of the building slab. This dilutes the concentrations of the gas emitting from the ground to acceptable levels. The A. Proctor Group PROVOID system is supplied as a fully integrated gas dispersal system including all necessary pipework, ducting and a variety of air inlets/outlets to suit your individual requirements Secondary protection The impermeable gas membrane provides a barrier to gas ingress and should be continuous beneath the full plan area of the building. Our range of reinforced gas barriers are complemented with a variety of sealing tapes, tophats, self adhesive flashings and gas resistant DPC’s.
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PROTECH SUPER What is Protech Super? Protech Super is a high performance, reinforced, polyethylene gas resistant membrane, with a 12 micron aluminium foil core (complies with table 8.6 of the new Ciria C659 document). Which gases does it protect against? Protech Super protects structures from the ingress of Methane, (CH4), Carbon Dioxide (CO2) and Radon (Ra). Why is Protech Super Reinforced? Protech Super is fully reinforced to prevent the membrane from elongating. This is imperative due to the aluminium core having a low coefficient of elongation. The reinforcement scrim also has the added benefit of localising punctures (should they arise from failure to protect the membrane from follow on trades) to the membrane and preventing tears developing. Thus enabling any punctures to be easily repaired without the risk of decreasing the membranes integrity. How is Protech Super Jointed? Protech Super can be either tape jointed using Probond 30mm double sided, cross-linked butyl tape, or alternatively can be welded using a hand-held or automatic hot air gun. Pre-fabricated welded panels complete with air channel, can be supplied to individual plot sizes on request. How do I ensure a complete gas tight seal? We supply a complete range of ancillary products, which when installed as per the manufacturers instructions, will create a complete gas tight seal. See page 8 for specific products and details.
Typical Properties Roll Length
50m or 25m
Width
2m
Weight
0.37kg/m2
Thickness
0.4mm
Colour
Green / Silver
Physical Characteristics Tensile Strength kN/m (BS 4415 Part 2)
10.5
Nail Tear Resistance MOAT :5.4.1 Along / Across roll
160 N / 160 N
Moisture Vapour Transmission Rate (BS3177)
<0.01g/m2 /24h
Methane Permeability ml/m2/24h
<0.001
PROBUILD 880 What is Probuild 880? Probuild 880 is a high performance, reinforced, polyethylene gas resistant membrane (complies with table 8.6 of the new Ciria C659 document). Which gases does it protect against? Probuild 880 protects structures from the ingress of Damp, Carbon Dioxide (CO2) and Radon (Ra). (For full Radon protection refer to page 11). Why is Probuild 880 Reinforced? Probuild 880 is fully reinforced to prevent the membrane from elongating. The reinforcement scrim also has the added benefit of localising punctures to the membrane (should they arise from failure to protect the membrane from follow on trades) and preventing tears developing. Thus enabling any punctures to be easily repaired without the risk of decreasing the membranes integrity. How is Probuild 880 Jointed? Probuild 880 can be either tape jointed using Probond 30mm double sided, cross-linked butyl tape, or alternatively can be welded using a hand-held or automatic hot air gun. Pre-fabricated welded panels complete with air channel, can be supplied to individual plot sizes on request. How do I ensure a complete gas tight seal? We supply a complete range of ancillary products, which when installed as per the manufacturers instructions, will create a complete gas tight seal. See page 8 for specific products and details.
Typical Properties Roll Length
50m or 25m
Width
2m
Weight
0.29kg/m2
Thickness
0.4mm
Colour
Blue
Physical Characteristics Tensile Strength kN/m (BS 4415 Part 2)
7.3
Nail Tear Resistance MOAT :5.4.1 Along / Across roll
112 N / 160 N
Water Vapour Resistance (BS3177)
420MNs/g
CO2 Permeability BRE Gas Chromatograph
0.06 g/m2 31 ml/m2 / day
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REGULATIONS The building regs doc part C 2 gives guidance for methane and CO2 concentrations in the ground with regards to new developments. Gas Protection measures are considered necessary where the concentrations of methane and/or CO2 exceed 1% and 1.5% by v/v in air respectively. The building regs refer to various design guidance documents. A system comprising several levels of protection is considered the least vulnerable to fail. Specific guidance on the design of passive gas dispersal systems is provided in the following documents. • CIRIA report C659 (assessing risk posed by hazardous ground gases for buildings - 2006) • BRE report 212 (construction of new buildings on contaminated land 1991) • DETR partners in technology (passive venting of soil gases beneath buildings research report guide for design 1997) • Wilson & Card 1999 Methane Gas (Explosive) Methane can form flammable and potentially explosive mixtures in air when ignited. The flammable or explosive range of methane is between 5% and 15% by volume in air. The concentrations limits are commonly known, ”lower explosion limit” (LEL) and, ”upper explosion limit” (UEL). Concentrations above the UEL should not be considered safe as dilution with air will cause the composition to fall within the flammable range. The presence of significant concentrations of CO2 will effect the flammable range of methane when the oxygen content is depleted. Methane, either in isolation or when mixed with air, can lead to asphyxiation. A concentration of greater than 1% methane in a confined space is considered hazardous in waste management paper no 27. Carbon Dioxide(Toxic) CO2 effects the respiratory and central nervous systems at concentrations greater than 0.5% by vol in air. It can cause unconsciousness leading to death at concentrations greater than 10% by vol in air. Waste management paper no 27 considers that CO2 is a hazard to health at concentrations greater than 1.5% by vol in air: at this level evacuation of an effected area is recommended.
GAS MEMBRANE ACCESSORIES Probond 30mm Tape is a cross linked butyl tape for tape jointing our range of gas resistant membranes.
Typical Properties Roll Length
30m
Width
30mm
Protech Preformed Tophats should be used to seal pipe penetrations. They are available in standard sizes of 55mm,110mm and 160mm diameter. We can also manufacture other sizes to suit your requirements on request.
Typical Properties To suit pipes
55mm/110mm/ 160mm
Texself GS is a self adhesive gas resistant membrane for tanking basements and lifts pits. (Refer to www.proctorgroup.com for technical data)
Typical Properties Roll Length
15m
Width
1m
Protech Gas Resistant GRDPC600 is a gas resistant DPC for bridging cavities and masonry.
Typical Properties Roll length
20m
Width (mm)
600
Protech Flashing 150 & 300 is a self adhesive gas resistant membrane for sealing around columns and stanchions. It can also be used to seal the flap on our gas resistant membranes.
Typical Properties Roll length
10m
Width (mm)
150 / 300
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PROVOID VENTING SYSTEM What is Provoid 25? Provoid 25 is 25mm thick single sided geocomposite that provides a void beneath floor slabs which when connected to air inlets and outlets allows sufficient air changes to dilute gases to safe concentrations (as per Partners in Technology 1997). Which gases can I use it with? Provoid 25 dilutes Methane, (CH4), and Carbon Dioxide (CO2) and should be designed to suit the gas regime on site. Why Should I use Provoid 25? Provoid 25 provides a cost effective engineered solution when used as an alternative to single sized clean stone. Provoid 25 can be laid in strips at predetermined centres or in a blanket as required and being only 25mm thick means there is a reduced dig when compared to a 200 or 150mm blanket of stone. Provoid 25 is also extremely strong and flexible with a crush resistance of 250kpa. Provoid 25 is supplied in rolls of 50m so large areas can be covered very quickly. Provoid 25 is flexible and can be laid horizontally and vertically to deal with awkward foundation arrangements. Because of its flexibililty it will cope easily with settlement under the slab without compromising the system.
Physical Properties Roll Length
50m
Width
450mm / 900mm
Thickness
25mm
Colour
Black
Creep Resistance 200Kpa for 100 hrs
5% Max
Intrinsic Permeability (k)
<1.2 x 10-5 m2
Forecheimer Team
<24.0 sm-1
Structure Ultimate compressive strength at yield
225kn/m2
VENTING SYSTEM ACCESSORIES Venting System Components 6,000mm2 ventilation area 1: Ground Level Gully Vent Box 2: Provoid Connector ‘T. Piece’ 3: Provoid (Geotextile side down)
1
2
3
Other examples of Air Inlet / Outlet options: Single Entry Slimline Vent Box 6,000mm2 Ventilation Area
Contact our technical department for project specific advice.
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Double Entry Slimline Vent Box 12,000mm2 Ventilation Area
RADON GAS APPLICATIONS Radon is a natural radioactive gas. Radon is a product of the breakdown of uranium and is present in most rocks and soils almost everywhere. Some types of rock, however, such as granite are particularly rich in uranium and therefore produce higher levels of naturally-occurring radon gas in areas such as the South West and Aberdeenshire. Investigations by The National Radiological Protection Board (NRPB), have revealed that the risk of contracting lung cancer increases in accordance with the level and length of exposure to radon. This has led to a dramatic increase in public awareness of the dangers of living in buildings where radon gas is likely to accumulate, and a demand for effective barrier and dispersal systems for installation in new and existing houses in high risk areas. The NRPB has set an action level for existing homes at an average radon level of 200 Bq/m3 over a full year. Above this level remedial action is recommended. Protective measures Gas enters a building primarily by airflow from the underlying ground. There are two main methods of achieving gas protection in new dwellings, basic and full protection. 1. Basic protection consists of an airtight reinforced barrier (Probuild 880) across the whole footprint of the building. Gas resistant DPC should be used to seal through masonary and cavity walls. 2. Full protection consists of the above and the inclusion of a Radon sump for every 250m2 of floor area. The sumps can be connected to air bricks, ventboxes for passive ventilation, or alternatively connected to a fan as shown opposite.
STANDARD DETAILS Gas protection measures to suspended slab with insulation and gas vent box gas dispersal system
Render
Protech 600 GRDPC overlapped and taped onto gas membrane overlap 100mm
Architects C.T. Protech Super 871 or Probuild 880 tape jointed gas membrane Protech gas ventbox @ required centres to suit gas regime for site
Provoid 25 gas venting mat laid as a blanket to entire footprint or at required centres to suit gas regime for site Protech gas collection T connector
Gas protection measures to ground bearing slab with internal wall
Protech 600 GRDPC overlapped and taped onto gas membrane overlap 100mm Protech Super 871 or Probuild 880 tape jointed gas membrane
Provoid 25 gas venting mat laid as a blanket to entire footprint or at required centres to suit gas regime for site Protech gas collection back to back T connector
Gas protection measures to raft with insulation and gas vent box gas dispersal system Protech 600 GRDPC Protech gas ventbox @ required centres to suit gas regime for site
Texself adhesive gas membrane on 2 coat bitumen primer Protech Super 871 or Probuild 880 tape jointed gas membrane
Provoid 25 gas venting mat laid as a blanket to entire footprint or at required centres to suit gas regime for site Protech gas collection T connector
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STANDARD DETAILS Gas protection measures to ground bearing slab with insulation and gas vent box gas
Render Architects DPC Protech gas ventbox @ required centres to suit gas regime for site
Protech 600 GRDPC overlapped and taped onto gas membrane overlap 100mm Protech Super 871 or Probuild 880 tape jointed gas membrane
Provoid 25 gas venting mat laid as a blanket to entire footprint or at required centres to suit gas regime for site Protech gas collection T connector
Gas protection measures to raft with insulation and gas vent box gas dispersal system
Cavity tray removed for clarity
Protech 600 GRDPC overlapped and taped onto gas membrane overlap 100mm
Protech gas ventbox @ required centres to suit gas regime for site
Protech Super 871 or Probuild 880 tape jointed gas membrane
Provoid 25 gas venting mat laid as a blanket to entire footprint or at required centres to suit gas regime for site Protech gas collection T connector
Gas membrane detail to service penetration
Protech preformed tophat c/w jubilee clip
Protech tape jointed gas membrane
OTHER PRODUCTS Porous (permeable/pervious) Paving System Description: Proctorpave natural grass finish is a structure which provides incredible load bearing strength while protecting vegetation root systems from deadly compaction. High void spaces within the entire cross-section enable excellent root development, and storage capacity for rainfall from storm events. Stormwater is slowed in movement through and across ProctorPave surfaces, which deposits suspended sediment and increases time to discharge. Suspended pollutants and moderate amounts of engine oils are consumed by active soil bacteria, which are aided by the system’s excellent oxygen exchange capacity. Benefits: • Pervious Load Bearing Surface • Stormwater Pollution Filtration and Treatment • Airborne Dust Capture and Retention • Heat Energy Reflection Reduction, “Cool” Surface • Tree Growth within Parking Areas The ProctorPave natural grass finish system is comprised of a sandy gravel base course,Hydrogrow polymer-fertilizer mixture, the ProctorPave ring and grid structure, sharp sand and grass seed or sod. Applications Include: • Overflow Parking • Firelanes • Event Parking • Driveways • Employee Parking • Utility Access • On-street Parking • Pedestrian Access • Handicap Parking • Emergency Access • Infiltration Basins
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OTHER PRODUCTS Porous (pervious/permeable) Paving System Description: ProctorPave gravel finish is a structure to provide heavy load bearing support and true containment of gravel to create a porous pavement surface with unlimited traffic volume and/or duration time for parking. When used with a correct porous base course material, ProctorPave can provide a void space of 35% for storage volume of rainfall during rain events. For example, an 8” deep cross-section would store 2.8” of rain. Although bacteria concentrations are lower than with ProctorPave Grass, polluted runoff and vehicle drippings are consumed prior to reaching the water table. Benefits: • Pervious Load Bearing Surface – Unlimited Traffic • Stormwater Pollution Filtration and Treatment • Heat Energy Reflection Reduction, “Cool” Surface • Tree Growth within Parking Areas ProctorPave gravel finish is comprised of a porous geotextile fabric, molded directly to the one inch high integrated ring and grid system. ProctorPave sits atop an engineered porous base course, is anchored down with galvanized anchors and is filled with decorative gravel. Applications: • All Parking Aisles and Bays • Handicap Parking Spaces • Automobile and Truck Storage Yards • All Service and Access Drives/Loading Dock Areas • Trails for Multiple Uses • Boat Ramps • Outdoor Bulk Storage Areas (Lumber, Steel, etc.) • Infiltration Basins • High-use Pedestrian Areas
INNOVATION BUILT ON EXPERIENCE
The Haugh Blairgowrie Perthshire PH10 7ER telephone 01250 872 261 fax 01250 872 727 email askgeo@proctorgroup.com www.proctorgroup.com apg5548
METAL ROOFING CONSTRUCTION MEMBRANES THERMAL INSULATION GEOSYNTHETIC ENGINEERING ACOUSTIC INSULATION VIBRATION ISOLATION TIMBER CLADDING