Specifications

CGL Systems are working with RIBA Enterprises to write an NBS Plus specification to cover all the components of the CGL Rainpulse Rainwater Management System.  A specification has been prepared and is currently being reviewed by NBS Plus.  The content of this specification is below and is suitable for use until the final version is concluded at which time the below specification will be replaced.

The specification includes relevant aspects of R10 including design, gutter, outlets, pipework and installation.  To download a copy please click here.

If you require an H31 234 specification for your gutter click to download for either the insulated or single skin version.

If you require alternative gutter types or assistance in writing a specification for your project please contact us where we will be delighted to assist.

R10    RAINWATER PIPEWORK / GUTTERS

To be read in conjunction with Preliminaries/General Conditions.

60 J Prototype if required:  Submit one of each of the following for inspection by the CA before starting supply:
RainPulse Outlet – Patent Number PCT/GB2009/000336 to BS EN 12056-3:2000 complete with small section of Aluminium or HDPE pipe section and pipe clip attached.

75 J Design Responsibility: CGL systems Ltd: take full responsibility for the design, sourcing of materials, manufacture and supply.  Advise on the implications of the system and interfaces on all other elements of the building.

Types of Pipework/Gutters

Please select from the following 2 options for pipe work

295 J HDPE Pipework

• CGL Rainpulse Rainwater Management System incorporating the CGL Rainpulse Gutter as detailed in R10 320 or H31 234 (available from CGL Systems), the CGL Rainpulse Outlet and the CGL Rainpulse HDPE downpipe system with associated pipe clip sets.
• Pipe and fittings: HDPE to DIN 4102-B2, DIN19537, S12.5 BD EN1519, PE80 Wall thickness and diameter and marked accordingly along the length of the pipe.  BBA certificate number 92\2796
• Manufacturer and reference:
  CGL Systems Ltd
  2 Young Place
  Kelvin Industrial Estate
  East Kilbride
  G75 0TD.
  Tel: 01355 235561
  Fax: 01355 247189
  E-mail: rainpulse@cglsystems.co.uk
• Size: Outside pipe diameter options are 75, 90 and 110mm HDPE as determined by CGL Systems as part of the building design and denoted on working drawings. (Consult with CGL Systems)
• Accessories:
  Flexseal couplings or equal approved joint for connection to underground.
  Push fit jointed fittings, as appropriate.
  Bond It Multi-Mate high modulus general purpose silicone sealant as supplied by CGL Systems.
• Method of jointing: Apply above stated silicone sealant to pipe end and push fit into sleeves with EPDM ring seal to appropriate depth. 
• Method of fixing: Proprietary M10 pipe clip sets available from CGL Systems.

295 J Aluminium Pipework

• CGL Rainpulse Rainwater Management System incorporating the CGL Rainpulse Gutter as detailed in R10 320 or H31 234 (available from CGL Systems), the CGL Rainpulse Outlet and the CGL Rainpulse Aluminium downpipe system with associated pipe clip sets.
• Pipe and fittings: Pipes are Aluminium Tubes 6063-T6 with a wall thickness of 1.6mm.  Fittings are manufactured from 2mm Aluminium, minimum grade 1050
• Manufacturer and reference:
  CGL Systems Ltd
  2 Young Place
  Kelvin Industrial Estate
  East Kilbride
  G75 0TD.
  Tel: 01355 235561
  Fax: 01355 247189
  E-mail: rainpulse@cglsystems.co.uk
• Size:  Outside pipe diameters options are 76.2, 88.9 and 101.6mm Aluminium tube as determined by CGL Systems as part of the building design and denoted on working drawings. (Consult with CGL Systems).
• Accessories:
  Flexseal couplings or equal approved joint for connection to underground.
  Butt fusion jointed fittings, as appropriate.
  Bond It Multi-Mate high modulus general purpose silicone sealant as supplied by CGL Systems.
• Finish: The aluminium pipes can either be supplied in a mill finish or be Polyester Powder Coated to a RAL colour.  (PPC colour to be added here) 
• Method of jointing: Apply above stated silicone sealant to pipe end and insert into Push fit sleeves to appropriate depth. 
• Method of fixing: Proprietary M10 pipe clips as per catalogue available from CGL Systems.

Please select from the following 4 options for Gutters

320    Insulated Gutter

• CGL Rainpulse Insulated Gutter - A prefabricated light-weight self-supporting metal   composite insulated construction with a fully bonded, continuous Sarnafil membrane lining to the water-carrying surface.  The gutters are suitable for regular walkway traffic and have minimal maintenance requirements.  CGL can provide design and specifications for a full Rainpulse Rainwater Management service and it is recommended that they are consulted early in the design process. 
• Manufacturer and reference:
  CGL Systems Ltd
  2 Young Place
  Kelvin Industrial Estate
  East Kilbride
  G75 0TD
  Tel: 01355 235561
  Fax: 01355 247189
  E-mail: rainpulse@cglsystems.co.uk
• Profile: Valley / Box / Boundary wall (Select)
• Type: CGL Rainpulse Membrane Lined Gutter as part of the CGL Rainpulse Rainwater Management System.
• Gauge, Finish & Colour:
• External Finish - 1.2mm thick Sarnafil reinforced PVC weatherproofing membrane
  G410-12EL, colour: Light grey.  Factory laminated to 1.2mm thick galvanised steel to BS EN 10142 grade Fe P02G with Z275 coating.
  Insulation – 90mm Polyisocyanurate (PIR) which is CFC and HCFC free providing a “U” value of 0.25 W/m²K. (For alternative “U” values consult with CGL Systems).
  Internal Liner Sheet –
  0.6mm thick galvanised steel to BS EN 10142 grade Fe P02G with Z275 coating or
  0.7mm thick Polyester coated White Enamel, 20 micron top coat to underside of lining (10 micron wash coat to reverse)
• Size(s):  ……mm Girth.  (Consult with CGL Systems and Insert Sizes).
• Accessories:
  CGL Rainpulse Rainwater Outlets: fitted on site at appropriate locations within the CGL Rainpulse Gutter.
  CGL Rainpulse Downpipe System: fitted to CGL Rainwater Outlets on site.  Downpipes either HDPE or Aluminium mill finish or with PPC finish.
  Support where required: Loose pre-galvanised steel support straps 50 x 6mm flat bar to BS 4360, galvanised to BS 729
• Site fixing materials: 4.9mm diameter plated steel rivets, Outlets and overflows which are generally supplied loose for site installation and positioning.
• Factory fabricated: Fitted stop ends / mitred corner sections / tee sections / change of section / sumps.
  Walkway systems: PVC Sarnatred walkway mats.
• Method of jointing: Form site joints and fit outlets and overflows by riveting the overlap of metal and hot air weld overlapping Sarnafil PVC membrane, leaving a central unbonded strip which allows for expansion and contraction.
• Method of fixing: Gutter wings to be pre-fixed to purlin / support steelwork at approximately 300mm centre’s both sides prior to installation of roof liner sheet.

320    Thermally Broken Insulated Gutter

• CGL Rainpulse Thermally Broken Insulated Gutter - A prefabricated light-weight self-supporting metal composite insulated construction incorporating a thermal break minimising thermal bridging and heat loss.  The water carrying surface to be lined with Sarnafil membrane with a minimum thickness of 1.2mm. The gutters are suitable for regular walkway traffic and have minimal maintenance requirements.  CGL can provide design and specifications for a full Rainpulse Rainwater Management service and it is recommended that they are consulted early in the design process.
• Manufacturer and reference:
  CGL Systems Ltd
  2 Young Place
  Kelvin Industrial Estate
  East Kilbride
  G75 0TD
  Tel: 01355 235561
  Fax: 01355 247189
  E-mail: rainpulse@cglsystems.co.uk
• Profile: Valley / Box / Boundary wall (Select)
• Type: CGL Rainpulse Thermall Broken Membrane Lined Gutter as part of the CGL Rainpulse Rainwater Management System.
• Gauge, Finish & Colour:
  External Finish - 1.2mm thick Sarnafil reinforced PVC weatherproofing membrane
  G410-12EL, colour: Light grey.  Factory laminated to 0.6mm thick galvanised steel to BS EN 10142 grade Fe P02G with Z275 coating and thermal break material.
  Insulation – 90mm Polyisocyanurate (PIR) which is CFC and HCFC free providing a “U” value of 0.25 W/m²K. (For alternative “U” values consult with CGL Systems).
• Internal Liner Sheet
  0.6mm thick galvanised steel to BS EN 10142 grade Fe P02G with Z275 coating or
  0.7mm thick Polyester coated White Enamel, 20 micron top coat to underside of lining (10 micron wash coat to reverse)
  Size(s):  ……mm Girth.  (Consult with CGL Systems and Insert Sizes).
• Accessories:
  CGL Rainpulse Rainwater Outlets: fitted on site at appropriate locations within the CGL Rainpulse Gutter.
  CGL Rainpulse Downpipe System: fitted to CGL Rainwater Outlets on site.  Downpipes either HDPE or Aluminium mill finish or with PPC finish.
  Tell tale overflows fitted either in the gutter base or the stop ends.
  Support where required: Loose pre-galvanised steel support straps 50 x 6mm flat bar to BS 4360, galvanised to BS 729
• Site fixing materials: 4.9mm diameter plated steel rivets, Outlets and overflows which are generally supplied loose for site installation and positioning.
• Factory fabricated: Fitted stop ends / mitred corner sections / tee sections / change of section / sumps.
  Walkway systems: PVC Sarnatred walkway mats.
• Method of jointing: Form site joints and fit outlets and overflows by riveting the overlap of metal and hot air weld overlapping Sarnafil PVC membrane, leaving a central unbonded strip which allows for expansion and contraction

320    Single Skin Gutter

• CGL Rainpulse Single Skin Gutter - A prefabricated metal profile with a fully bonded, continuous Sarnafil membrane lining to the water-carrying surface.  The gutters are suitable for regular walkway traffic and have minimal maintenance requirements.  CGL can provide a design and specifications for a full Rainpulse Rainwater Management service and it is recommended that they are consulted early in the design process.
• Manufacturer and reference:
  CGL Systems Ltd
  2 Young Place
  Kelvin Industrial Estate
  East Kilbride
  G75 0TD
  Tel: 01355 235561
  Fax: 01355 247189
  E-mail: rainpulse@cglsystems.co.uk
• Size(s):  (insert……mm) Girth (Consult with CGL and insert sizes).
• Gutter construction:
  External finish: 1.2mm thick Sarnafil reinforced PVC weatherproofing membrane
  G410-12EL, colour: Light grey. 
  Metal finish: 1.2mm / 1.6mm / 2mm / 3mm thick galvanised steel to BS EN 10142 grade Fe P02G with Z275 coating. (Consult with CGL and insert thickness) 
• Method of jointing: Form site joints and fit outlets and overflows by riveting the overlap of metal and hot air weld overlapping Sarnafil PVC membrane, leaving a central unbonded strip which allows for expansion and contraction.
• Method of fixing: Gutter wings to be pre-fixed to purlin/support steelwork at approximately 500mm centres both sides prior to installation of roof liner sheet.
• Accessories:
  CGL Rainpulse Rainwater Outlets fitted on site at appropriate locations within the CGL Rainpulse Gutter.
  CGL Rainpulse Downpipe System fitted to CGL Rainwater Outlets on site.  Downpipes either HDPE or Aluminium mill finish or with PPC finish.
  Tell tale overflows fitted either in the gutter base or the stop ends.
  Support where required: Loose steel support straps 50 mm x 6mm flatbar to BS 4360, galvanised to BS 729
  Gutter Site fixing materials: 4.9mm diameter plated steel rivets, outlets and overflows which are generally supplied loose for site installation and positioning.
  Factory fabricated: Fitted stop ends / mitred corner sections / tee sections / change of section / sumps.
  Walkway systems: PVC Sarnatred walkway mats.

320 Gutter Liner

• CGL Rainpulse Gutter Liner - A prefabricated metal profile with a fully bonded, continuous Sarnafil membrane lining to the water-carrying surface. The liner is designed to be used on failed existing gutters or during a building refurbishment. CGL can provide a design and specifications for a full Rainpulse Rainwater Management service and it is recommended that they are consulted early in the design process.
• Manufacturer and reference:
  CGL Systems Ltd
  2 Young Place
  Kelvin Industrial Estate
  East Kilbride
  G75 0TD
  Tel: 01355 235561
  Fax: 01355 247189
  E-mail: rainpulse@cglsystems.co.uk
• Size(s):  (insert……mm) Girth.  (Consult with CGL and insert sizes).
• Gutter construction:
  External finish: 1.2mm thick Sarnafil reinforced PVC weatherproofing membrane G410-12EL, colour: Light grey. 
  Metal finish: 0.6mm thick galvanised steel to BS EN 10142 grade Fe P02G with Z275 coating.
• Method of jointing: Form site joints and fit outlets and overflows by riveting the overlap of metal and hot air weld overlapping Sarnafil PVC membrane, leaving a central unbonded strip which allows for expansion and contraction.
• Method of fixing: Gutter wings to be pre-fixed to purlin/support steelwork at approximately 500mm centres both sides prior to installation of roof liner sheet.
• Accessories:
  CGL Rainpulse Rainwater Outlets fitted on site at appropriate locations within the CGL Rainpulse Gutter.
  CGL Rainpulse Downpipe System fitted to CGL Rainwater Outlets on site.  Downpipes either HDPE or Aluminium mill finish or with PPC finish.
  Tell tale overflows fitted either in the gutter base or the stop ends.
  Gutter Site fixing materials: 4.9mm diameter aluminium rivets, outlets and overflows which are generally supplied loose for site installation and positioning.
  Factory fabricated: Fitted stop ends / mitred corner sections / tee sections / change of section / sumps
  Walkway systems: PVC Sarnatred walkway mats.

370 J Rainwater Outlets

• CGL Rainpulse Outlets - Outlets are high velocity outlets to ensure efficiently extracting the water from the gutter and into the pipe work system.  The CGL Rainpulse Rainwater Management System incorporates an appropriate gutter, outlets and pipes to ensure maximum efficiency in the use of all components.  Must be used in conjunction with the CGL Rainpulse Gutter as detailed in R10 320 or H31 234 (available from CGL Systems) and the CGL Rainpulse HDPE or Aluminium downpipe system (see R10 295 J) with associated pipe clip sets.
• Outlet Components:
  Spigots are manufactured in Aluminium grade BS1050 in 2/3mm. 
  Anti-vortex plate and clamp rings are manufactured from die cast aluminium LM6 BS1490-1998.   
• Manufacturer and reference:
  CGL Systems Ltd
  2 Young Place
  Kelvin Industrial Estate
  East Kilbride
  G75 0TD.
  Tel: 01355 235561
  Fax: 01355 247189
  E-mail: rainpulse@cglsystems.co.uk
• Roof construction: Rainpulse outlets fitted into CGL Membrane Lined Gutter system as detailed in R10 320. 
• Size: Determined by CGL Systems as part of the specific building design calculation performed by CGL Systems and denoted on working drawings. (Consult with CGL Systems).

390 J Rainpulse System  

• Design, Fabrication and Supply of a high efficiency rainwater management system for discharging rainwater from the roof to ground drainage.  The system consists of a membrane lined gutter, outlets (site fitted) and either HDPE or Aluminium down pipes.  The components form part of the overall system.  The ability of the system to discharge rainwater from the roof to ground drainage is calculated through CGL Systems software on a project to project basis. 
• Manufacturer and reference:
  CGL Systems Ltd
  2 Young Place
  Kelvin Industrial Estate
  East Kilbride
  G75 0TD.
  Tel: 01355 235561
  Fax: 01355 247189
  E-mail: rainpulse@cglsystems.co.uk
• System Components:
  CGL Rainpulse Membrane Lined Gutter (R10 320 or H31 234).
  CGL Rainpulse Outlet (R10 370)
  CGL Rainpulse HDPE down pipes or CGL Rainpulse Aluminium Downpipes (R10 295). 
• The system must be designed within the following parameters to operate to discharge to underground drainage economically, be regularly self-cleansing and maintenance free in normal use with an annual inspection and clean if necessary.
• The roof drainage subcontractor will liaise with CGL Systems to determine optimum positions of the Rainpulse outlets and pipework.
• The system shall protect the buildings from the ingress of rainwater at all times both internal and external.
• Pipe work must remain airtight at maximum and minimum operating pressures. Pipe work must accommodate structural and thermal movement using flexible joints or other suitable means without damage to fixings and joints or excess stress, abrasion or noise.
• Design rate of rainfall: As EN 12056-3:2000
  Geographical Location: (specific to project please complete)
  Storm Duration: 2 minutes.
  Building life: (specific to project please complete)
  Category of risk (specific to project please complete) to BS EN 12056-3:2000
  Maximum operational pressure: -0.80 bar gauge m vacuum.
• Roof outlets: number, location and size to be determined by CGL systems.  Rainwater outlets to be supplied to the roofing contractor for installation prior to pipe work.

392 J Design Responsibility

• CGL Systems in conjunction with the relevant project subcontractors take full responsibility for the design, fabrication, supply and installation of the complete above ground rainwater collection system incorporating the gutter, outlets and pipe systems.  Provide drawings and calculations for submission to demonstrate Building Regulation compliance together with any other relevant legislation.
• Roof outlets - Produce and issue calculations / design drawings to the CA to demonstrate compliance with the specification and allow integration and co-ordination of the system into the building. Discuss and modify the design to incorporate comment made during the drawing inspection process.

394 J  Particular Design Considerations

• In addition, take into account the following considerations:
• Allow for all fixing clip sets for installation of the complete system.
• Advise the CA and the drainage infrastructure consultant of the relevant LPS (litres per second) discharge of each downpipe location and agree the adequacy and capacity of the drainage infrastructure to ensure full operation of the CGL Rainpulse above ground drainage.

400    Installation

• Before Commencing Work specified in this section, ensure that below ground drainage is ready to receive rainwater or that the discharge can be dispersed by approved means to prevent damage or disfigurement of the building fabric.

410 J  Installation Generally

• Install pipe work / gutters to ensure the complete discharge of rainwater from the building in accordance with design requirements without leaking.
• Obtain all components for the Rainpulse rainwater management system from CGL Systems. 
• Avoid contact between dissimilar metals and other materials which would result in electrolytic corrosion.
• Do not bend plastic pipes.
• Adequately protect pipe work from damage and distortion during construction.

550 J  Testing Guidance Generally

• Inform CA sufficiently in advance to give a reasonable opportunity to observe tests.
• Check that all sections of the installation are free from obstructions and debris before testing.
• Carry out tests as specified, after testing, locate and remedy all defects without delay and retest as instructed.
• Keep a record of all tests including completion certificate and provide a copy of each direct to the CA.