CORDEK LTD

SPRING COPSE BUSINESS PARK
SLINFOLD
WEST SUSSEX RH13 0SZ

Tel: 01403 799600
Fax: 01403 791718

Company Logo

Suppliers of: formwork moulds arch formers foundation clayheave protection foundation ground movement protection membranes radon resistant trough moulds void formers landfill lining barriers

Cordek is Europe’s largest manufacturer and supplier of specialist expanded polystyrene products for the construction industry.

Cordek have a range of CAD drawings and BIM Files: click here

Accredited products, respected throughout the industry, fully proven on projects world-wide, the choice of engineers, architects and specifiers.

Cordek Construction Products

Cordek can now offer an exciting range of products that are extensively used in a variety of construction applications.

These fall into the following market sectors:

Ground Heave Solutions

Products for the protection of buildings from the effects of expansive soil.

VOC & Ground Gas Protection

A range of solutions for the protection of buildings from the hazards relating to VOC’s and ground gas.

Structural Fill Solutions

Expanded Polystyrene (EPS) for use as a lightweight alternative to traditional fill materials, for permanent load bearing applications.

Permanent Formwork for Groundbeams & Pile Caps

Economical permanent formwork systems that have replaced traditional formwork materials for the construction of cast insitu concrete foundations.

Standard Formwork Solutions

Falsework and Formwork systems to aid the construction of structures formed from both masonry and reinforced concrete

Void Formers

Used for the formation, shaping and positioning of openings to reduce the weight of concrete structures.

Formwork for Ribbed Concrete Floors

Established formwork systems for the construction of both one way (troughs) and two way (waffles) spanning ribbed concrete floors.

Piling Products

Solutions to common issues associated with piled foundations.

Temporary Protection

Polypropylene protection boards for construction and refurbishment works.

Complex Formwork for In-Situ Concrete

Innovative formwork solutions for creating architectural features, finishes and shapes with in-situ cast concrete.

Patterns & Moulds for Precast Concrete & GRC

Specialist forms for the creation of high quality architectural finishes in Precast concrete and Glass Reinforced Composites.

Non Construction

Cordek provides creative solutions for a wide range of sectors; from Marine, leisure and exhibition to film and theatre.

 

Download and technical information: Cordek provide a wealth of useful information and technical specifications.

These include: CAD Drawings COSHH Data Sheets Filcor Specification Sheet Gas Protection Data Sheet NBS Clauses Newsletters Partners in Technology Product Literature Standard Details – Construction

Further technical information, CAD Drawings, Guides and product specifications are available on the Cordek Website.

These files are provided by the manufacturer. While Building Products Index takes every care to ensure the information is correct and up to date, we cannot be held liable for any out of date or incorrect information in them. Please check with the supplier before specifying or purchasing products.

1 - Cordek VOC and Ground Gas Brochure
Passive Venting Systems & Accessories Gas Venting Outlets

Published [06/01/19]File size [5116 KB]

2. Cordek Brochure Ground Heave V1
protection of buildings from the effects of expansive soil, ground heave protection, pile collars

Published [06/01/19]File size [1014 KB]

3. Cordek M-DS30 Correx Data Sheet V3
Correx - polypropylene protection board

Published [06/01/19]File size [608 KB]

4. Cordek M-DS03 Cellcore HX Data Sheet V4
Ground Heave Solutions

Published [06/01/19]File size [2591 KB]

5. Cordek M-DS24 Corform Data Sheet V3
Formwork, Permanent Formwork for Groundbeams & Pile Caps

Published [06/01/19]File size [522 KB]

6. Cordek M-DS26 Corbreak Data Sheet V1
Piling products

Published [04/08/17]File size [357 KB]

7. Cordek M-DS22 Groundform Sideform Data Sheet V2
heavy duty Correx sheeting system

Published [04/08/17]File size [425 KB]

8. Cordek M-DS15 Radon Sump Data Sheet v3
radon sump ground gas protection

Published [28/03/18]File size [64 KB]

9. Cordek M-DS06 Ventform Data Sheet V3
Ground Gas Venting Foundations

Published [06/01/19]File size [266 KB]

Cordek Heaveguard Data Sheet
Protects against lateral heave on piled ground beams or deep trench filled foundations, ground heave protection

Published [01/05/18]File size [1701 KB]

Cordek M DS05 Cellvent HX Data Sheet
Ground Movement Gas Venting foundation Systems

Published [25/07/16]File size [327 KB]

Cordek M DS18 Air Brick and Adjustable Cavity Vent Data Sheet
Air Brick & Adjustable Cavity Vent data sheet

Published [24/10/16]File size [540 KB]

Cordek M-DS04 Heaveguard Data Sheet V1
Ground Heave Solutions

Published [06/01/19]File size [1701 KB]

Cordek M-DS07 Puraflex VOC Membrane Data Sheet v4
VOC & Ground Gas Protection

Published [28/03/18]File size [808 KB]

Cordek M-DS08 Puraflex Primer Data Sheet v2
Puraflex Primer is a thin liquid bitumen primer

Published [28/03/18]File size [285 KB]

Cordek M-DS09 Puraflex Tank Membrane Data Sheet v4
VOC & Ground Gas Protection

Published [28/03/18]File size [813 KB]

Cordek M-DS10 Puraflex DPC Data Sheet v4
VOC & Ground Gas Protection

Published [06/01/19]File size [911 KB]

Cordek M-DS11 MB420 Gas Membrane Data Sheet V5
gas membrane sheet

Published [06/01/19]File size [746 KB]

Cordek M-DS23 Corgrid Data Sheet v3
Permanent Formwork for Groundbeams & Pile Caps

Published [28/03/18]File size [1049 KB]

Cordek M-DS25 Pilecor Data Sheet v2
piling products

Published [28/03/18]File size [2553 KB]

Cordek M-DS31 Filcor Data Sheet V3
Void Former Structural fill

Published [06/01/19]File size [1036 KB]

Cordek M-DS32 Ground Level Vent Box Data Sheet v5
ground level vent boxes

Published [28/03/18]File size [1398 KB]

Double Sided Jointing Tape data sheet

Published [14/12/15]File size [538 KB]

Gas Membrane Lap Tape data sheet

Published [14/12/15]File size [541 KB]

Gas Resistant Detailing Strip data sheet

Published [14/12/15]File size [541 KB]

Gas Resistant DPC data sheet

Published [14/12/15]File size [535 KB]

Gas Resistant Self Adhesive Membrane data sheet

Published [14/12/15]File size [545 KB]

Gas Venting Bollard data sheet

Published [14/12/15]File size [562 KB]

Gas Venting System Accessories data sheet

Published [14/12/15]File size [597 KB]

Radon Membrane data sheet

Published [14/12/15]File size [546 KB]

Reinforcement Spacer data sheet

Published [14/12/15]File size [539 KB]

Reuseable Guide Wall Formwork data sheet

Published [14/12/15]File size [541 KB]

Sacrificial Guide Wall Formers data sheet

Published [14/12/15]File size [806 KB]

Sheet Pile Infills data sheet
Piling Infills

Published [14/12/15]File size [620 KB]

These files are provided by the manufacturer. While Building Products Index takes every care to ensure the information is correct and up to date, we cannot be held liable for any out of date or incorrect information in them. Please check with the supplier before specifying or purchasing products.

Air Brick and Adjustable Cavity Vent
The Cordek Air Brick is designed to provide a practical method of venting ground gases from beneath a building, through the perimeter cavity wall construction with the additional use of an adjustable cavity vent. The air bricks can be connected to one of the Cordek venting systems, which when used in conjunction with a suitable membrane, provides an efficient and economical gas protection solution. Key Features: Airbricks, Airbricks

Published [13/12/18]

Cellcore HX B
Cellcore HX is Cordek’s fourth generation collapsible void former and has been designed to protect foundations from the effects of ground heave.The product consists of a cellular construction of expanded polystyrene which has been designed, moulded and tested to tight tolerances to achieve the specified performance characteristics.The Cellcore HX B range of products are designed for use beneath ground beams and pile caps. The product is available in a variety of depths, widths and grades to suit most commonly encountered combinations of soil heave potential and concrete depth. Compressible board substructure formwork, Compressible board substructure formwork

Published [13/12/18]

Cellcore HX Plus
In cases where insulation is also required beneath the slab, the Cellcore HX Plus range can be utilised to provide combined ground movement protection and insulation from a single product.The thermal resistance of the Cellcore HX Plus is based upon the thickness of insulation incorporated within the panels, usually determined by U-value calculation. Please contact the Cordek technical team for further assistance with determining the most appropriate Celllcore HX Plus specification. Compressible board substructure formwork, Compressible board substructure formwork

Published [13/12/18]

Cellcore HX S
Cellcore HX is Cordek’s fourth generation collapsible void former and has been designed to protect foundations from the effects of ground heave.The product consists of a cellular construction of expanded polystyrene which has been designed, moulded and tested to tight tolerances to achieve the specified performance characteristics.The Cellcore HX S range of products are designed for use beneath reinforced concrete floor slabs. The product is available in a variety of depths and grades to suit most commonly encountered combinations of soil heave potential and concrete depth. Compressible board substructure formwork, Compressible board substructure formwork

Published [13/12/18]

Cellform HX
Cellform HX combines the benefits of Cellcore HX with an economical and simple to install permanent formwork system. Each Cellform HX panel is supplied to the required beam width and depth. The principle is that the hinged side panels are supported off the reinforcement cage by concrete spacers, this then allows the excavation to be backfilled. The backfill then supports the formwork against the concrete pressure whilst the beam is cast and thereby avoids the need for fixing and striking traditional formwork. Permanent insulation formwork (PIF), Permanent insulation formwork (PIF)

Published [13/12/18]

Cellvent HX
Cellvent HX combines the benefits of Ventform with the Cellcore HX range.Cellvent HX alleviates the effects of ground movement and also provides an excellent gas venting medium. It is designed for use under suitably reinforced ground floor slabs. The depth of the Cellvent HX panel will dependupon the amount of ground heave that has been predicted. High density expanded polystyrene (HDPS) ventilated substructure formwork, High density expanded polystyrene ventilated substructure formwork

Published [13/12/18]

Circular Gulley Vent - CGV-022
The range of ground level vent boxes offered by Cordek, are designed to provide a practical and aesthetic method of venting ground gases from beneath a building, to the external atmosphere. The vent boxes are designed to be connected to one of the Cordek passive gas venting system and installed within the external landscaping. The use of vent boxes is recommended where the use of alternative vent options is precluded due to the type of external wall construction i.e. cladding, glazed facades. Key Features: Discharge and ventilating stack terminations, Discharge and ventilating stack terminations

Published [13/12/18]

Filcor EPS
The versatility of Filcor EPS means that any shape, size or profile can be manufactured with relatively short lead times. In addition, a range of materials of increasing compressive strengths are available to meet the loading requirements of the application, whilst also providing the most cost effective solution.Key Features: Expanded polystyrene (EPS) boards, Expanded polystyrene (EPS) board

Published [13/12/18]

Gas Resistant DPC
The Cordek Gas Resistant DPC is a polymeric DPC, designed for use in applications where combined damp proofing and gas protection is required. The DPC is robust and flexible, performing well under high compressive loads. Key Features: Gas-resistant damp-proof courses, Gas-resistant damp proof courses and/ or cavity trays

Published [13/12/18]

Gas Resistant Self Adhesive Membrane
The Cordek Gas Resistant Self Adhesive Membrane is generally used withinfoundation construction, predominantly to prevent the transmission of groundgases in both horizontal and vertical applications. It is manufactured using analuminium/polythene laminate coated on one surface, with an additional layer ofself-adhesive polymer modified bitumen. Key Features: Bitumen sheets, Bitumen sheets

Published [13/12/18]

Gas Venting Bollard - 025
The Cordek Gas Vent Bollards provide an efficient and economical method of venting ground gases from beneath a building to the atmosphere when connected to a suitable venting system e.g. Cordek Ventform or Cellvent. Vent Bollards are usually installed in locations where alternative venting methods,such as air bricks, cannot be used or where a vent with a high level of free air flow is required. Key Features: Discharge and ventilating stack terminations, Discharge and ventilating stack terminations

Published [13/12/18]

Gas Venting Bollard - 026
The Cordek Gas Vent Bollards provide an efficient and economical method of venting ground gases from beneath a building to the atmosphere when connected to a suitable venting system e.g. Cordek Ventform or Cellvent. Vent Bollards are usually installed in locations where alternative venting methods,such as air bricks, cannot be used or where a vent with a high level of free air flow is required. Key Features: Discharge and ventilating stack terminations, Discharge and ventilating stack terminations

Published [13/12/18]

Gas Venting Bollard - 027
The Cordek Gas Vent Bollards provide an efficient and economical method of venting ground gases from beneath a building to the atmosphere when connected to a suitable venting system e.g. Cordek Ventform or Cellvent. Vent Bollards are usually installed in locations where alternative venting methods,such as air bricks, cannot be used or where a vent with a high level of free air flow is required. Key Features: Discharge and ventilating stack terminations, Discharge and ventilating stack terminations

Published [13/12/18]

Ground Level Vent Box - CGV-017
The range of ground level vent boxes offered by Cordek, are designed to provide a practical and aesthetic method of venting ground gases from beneath a building, to the external atmosphere. The vent boxes are designed to be connected to one of the Cordek passive gas venting system and installedwithin the external landscaping. The use of vent boxes is recommended where the use of alternative vent options is precluded due to the type of externalwall construction i.e. cladding, glazed facades. Key Features: Discharge and ventilating stack terminations, Discharge and ventilating stack terminations

Published [13/12/18]

Ground Level Vent Box - CGV-018
The range of ground level vent boxes offered by Cordek, are designed to provide a practical and aesthetic method of venting ground gases from beneath a building, to the external atmosphere. The vent boxes are designed to be connected to one of the Cordek passive gas venting system and installedwithin the external landscaping. The use of vent boxes is recommended where the use of alternative vent options is precluded due to the type of externalwall construction i.e. cladding, glazed facades. Key Features: Discharge and ventilating stack terminations, Discharge and ventilating stack terminations

Published [13/12/18]

Ground Level Vent Box - CGV-019
The range of ground level vent boxes offered by Cordek, are designed to provide a practical and aesthetic method of venting ground gases from beneath a building, to the external atmosphere. The vent boxes are designed to be connected to one of the Cordek passive gas venting system and installedwithin the external landscaping. The use of vent boxes is recommended where the use of alternative vent options is precluded due to the type of externalwall construction i.e. cladding, glazed facades. Key Features: Discharge and ventilating stack terminations, Discharge and ventilating stack terminations

Published [13/12/18]

Ground Level Vent Box - CGV-020
The range of ground level vent boxes offered by Cordek, are designed to provide a practical and aesthetic method of venting ground gases from beneath a building, to the external atmosphere. The vent boxes are designed to be connected to one of the Cordek passive gas venting system and installedwithin the external landscaping. The use of vent boxes is recommended where the use of alternative vent options is precluded due to the type of externalwall construction i.e. cladding, glazed facades. Key Features: Discharge and ventilating stack terminations, Discharge and ventilating stack terminations

Published [13/12/18]

Ground Level Vent Box - CGV-021
The range of ground level vent boxes offered by Cordek, are designed to provide a practical and aesthetic method of venting ground gases from beneath a building, to the external atmosphere. The vent boxes are designed to be connected to one of the Cordek passive gas venting system and installedwithin the external landscaping. The use of vent boxes is recommended where the use of alternative vent options is precluded due to the type of externalwall construction i.e. cladding, glazed facades. Key Features: Discharge and ventilating stack terminations, Discharge and ventilating stack terminations

Published [13/12/18]

Heaveguard
Heaveguard is the original compressible expanded polystyrene product, used when foundations need to be protected against ground heave. As an integral part of the Cordek solution to ground heave, Claymaster is used to protect against lateral heave, typically on the inside face of piled groundbeams or deep trench fill foundations.Claymaster consists of low density expanded polystyrene, coloured pink for easy identification on site and available in a variety of different thicknesses. The appropriate thickness ofthe product required is determined by the predicted lateral movement, in line with the NHBC guidance. Permanent insulation formwork (PIF), Permanent insulation formwork (PIF)

Published [13/12/18]

MB420 Gas Membrane
The Cordek MB420 Gas Membrane is a high performance gas membrane for use where resistance to methane, carbon dioxide and/or radon gas(es) is required. Generally used within construction applications, predominantly within the foundation design. The 0.7mm thick membrane includes an ultra low permeability aluminium foil core encapsulated between a number of additional LDPE layers and a reinforcing grid to form a single sheet membrane. Key Features: Plastics sheets, Plastics sheets

Published [13/12/18]

Puraflex DPC
The Cordek Puraflex DPC is a high performance, hydrocarbon and chemicalresistant barrier with exceptional resistance to a wide range of pollutants including hydrocarbons, industrial chemicals, toxic waste, natural and radioactive gases. The Cordek Puraflex DPC is generally used within wallconstructions, predominantly to prevent the transmission of VOCs and ground gases into the wall cavities. Key Features: Gas-resistant damp-proof courses, Gas-resistant damp proof courses and/ or cavity trays

Published [13/12/18]

Puraflex Tank VOC Membrane
The Cordek Puraflex Tank VOC membrane is a high performance hydrocarbon and chemical resistant barrier with exceptional resistance to a wide range of pollutants including hydrocarbons, industrial chemicals, toxic waste, natural and radioactive gases. The Cordek Puraflex Tank VOC membrane is generally used within foundation construction, predominantly to prevent the transmission of VOCs and ground gases in both horizontal and vertical applications. Key Features: Bitumen sheets, Bitumen sheets

Published [13/12/18]

Puraflex VOC Membrane
The Cordek Puraflex VOC membrane is a high performance hydrocarbon and chemical resistant barrier with exceptional resistance to a wide range of pollutants including hydrocarbons, industrial chemicals, toxic waste, natural and radioactive gases. The Cordek Puraflex VOC membrane is generally used within construction applications, predominantly within the foundation design. It also acts as a high performance DPM. Key Features: Plastics sheets, Plastics sheets

Published [13/12/18]

Radon Membrane
The Cordek Radon Membrane is a high performance gas membrane, for use in applications where resistance to radon gas is required as part of either a ‘full’ or ‘basic’ radon protection system. For ‘basic’ radon protection the use of the Cordek Radon Membrane covering the entire footprint of the building, usedin conjunction with the relevant accessories and system components should be sufficient. However if there is the requirement to provide ‘full’ radon protection, the additional use of a radon sump (please see Cordek Radon Sump datasheet) may be required – please contact the Cordek technical team for further assistance.The Cordek Radon Membrane is generally used within construction applications, predominantly within the foundation design. It can also act as a high performance DPM. Plastics sheets, Plastics sheets

Published [13/12/18]

Radon Sump
Cordek Radon Sumps act as an extraction point for radon gases beneath buildings within radon affected areas. If a radon sump is positioned within a permeable, granular layer beneath a ground floor slab and subsequently connected to an extract fan, then the penetration of hazardous radon gas into the building is minimised. Key Features: Depressurization sumps, Depressurization sumps

Published [13/12/18]

Rectangular Gulley Vent - CGV-023
Gulley vent with stainless steel perforated lid. Discharge and ventilating stack terminations, Discharge and ventilating stack terminations

Published [13/12/18]

Rectangular Gulley Vent - CGV-024
Gulley vent with stainless steel slotted lid. Discharge and ventilating stack terminations, Discharge and ventilating stack terminations

Published [13/12/18]

Ventform
The Cordek Ventform provides an excellent passive gas venting medium for use under suitably reinforced concrete ground floor slabs. When used in combination with perimeter vents and a suitable gas membrane system, it will provide an effective method of protecting structures against the ingress of harmful ground gases. Key Features: High density expanded polystyrene (HDPS) ventilated substructure formwork, High density expanded polystyrene ventilated substructure formwork

Published [13/12/18]

ACCESS RAMPS Portable .
ACCESS RAMPS Temporary .
AIR BRICKS Ground Gas Ventilation .
BOARDS Antistatic .
BOARDS Crush Resistant .
BOARDS Flame Retardant Boards
BOARDS Polypropylene .
BOARDS Protection For Waterproofing Membranes
BOLLARDS Ground Gas Venting .
BUILDING PROTECTION Temporary Correx .
CAVITY TRAYS Gas Barrier .
COLUMN FORMERS
DAMPCOURSES Gas Resistant .
DAMPCOURSES Hydrocarbon Barrier .
DAMPCOURSES Methane Barrier .
DEBRIS CONTROL
EXPANDED Polystyrene EN 13163:2001
EXPANDED Polystyrene Loadbearing
FABRICATIONS EPS (Expanded Polystyrene)
FABRICATIONS EPS Loadbearing
FLOOR Protection Temporary Correx
FLOORS Concrete In-Situ Specialist Moulds
FLOORS Concrete In-Situ Trough Moulds
FLOORS Concrete In-Situ Waffle Moulds
FORMERS Purpose Made .
FORMERS Staircase .
FORMWORK Accessories .
FORMWORK Concrete .
FORMWORK Curved .
FORMWORK Dished Floor .
FORMWORK Elements .
FORMWORK Insulating .
FORMWORK Insulating ICF Systems
FORMWORK Moulds .
FORMWORK Moulds Architectural
FORMWORK Moulds Archway
FORMWORK Moulds Bridge Parapets
FORMWORK Moulds Columns
FORMWORK Moulds Contoured Roofing Roofs
FORMWORK Moulds Diving Boards
FORMWORK Moulds EPS
FORMWORK Moulds Floor
FORMWORK Moulds Glassfibre Fibreglass Moulds
FORMWORK Moulds Helical Staircases
FORMWORK Moulds Internal
FORMWORK Moulds Light Recesses
FORMWORK Moulds Marine Applications
FORMWORK Moulds Polypropylene
FORMWORK Moulds Purpose Made
FORMWORK Moulds Railway
FORMWORK Moulds Re-Usable
FORMWORK Moulds Spiral Staircases
FORMWORK Moulds Trough and Waffle
FORMWORK Moulds Vaulted Ceilings
FORMWORK Permanent .
FORMWORK Permanent Ground Beams
FORMWORK Permanent Ground Heave Protection
FORMWORK Permanent Ground Movement Protection
FORMWORK Permanent Pile Caps
FORMWORK Sloped Floor .
FORMWORK Specialist .
FORMWORK Systems .
FOUNDATION Clayheave Protection .
FOUNDATION Clayheave Protection AGREMENT CERTIFICATE HOLDERS
FOUNDATION Engineering .
FOUNDATION Gas Passive Venting Systems .
FOUNDATION Ground Heave Protection Boards / Sheets .
FOUNDATION Ground Heave Protection Boards / Sheets AGREMENT CERTIFICATE HOLDERS
FOUNDATION Ground Heave Protection Boards / Sheets Expanded Polystyrene EPS
FOUNDATION Ground Heave Protection Boards / Sheets NHBC Technical Standards
FOUNDATION Ground Heave Protection Boards / Sheets Pile Collars
FOUNDATION Ground Heave Protection Panels .
FOUNDATION Ground Heave Protection Panels AGREMENT CERTIFICATE HOLDERS
FOUNDATION Ground Heave Protection Panels Gas Venting
FOUNDATION Ground Heave Protection Panels NHBC Technical Standards
FOUNDATION Ground Heave Protection Panels Thermal Insulation Combined
FOUNDATION Ground Movement Protection .
FOUNDATION Ground Movement Protection AGREMENT CERTIFICATE HOLDERS
FOUNDATION Systems Shallow Depth Minimal Dig Insulating Expanded Polystyrene Pods EPS
GAS Protection Panels Methane Barriers Ground Soil Level
GAS Protection Systems .
GAS Ventilating Systems Passive Ground Gas Venting Media
GROUND BEAM Formwork .
GROUND MOVEMENT Protection .
IN-SITU CONCRETE Moulds .
INSULATING CONCRETE FORMWORK (ICF SYSTEMS)
INSULATING CONCRETE FORMWORK (ICF SYSTEMS) Above Ground Wall .
INSULATING CONCRETE FORMWORK (ICF SYSTEMS) Acoustic Wall .
INSULATING CONCRETE FORMWORK (ICF SYSTEMS) Basement Wall .
INSULATING CONCRETE FORMWORK (ICF SYSTEMS) Curved Wall .
INSULATING CONCRETE FORMWORK (ICF SYSTEMS) Earth Sheltered Wall .
INSULATING CONCRETE FORMWORK (ICF SYSTEMS) Swimming Pool Construction .
INSULATING CONCRETE FORMWORK (ICF SYSTEMS) Zero Energy Buildings .
JOINT SEALING STRIPS . .
LANDFILL Engineering .
LANDFILL Lining Barriers .
LANDFILL Site Construction .
LANDSCAPING Structures .
LANDSCAPING Structures EPS Purpose Made
LIFT SHAFT Construction Shuttering
MEMBRANES Acid Resistant EN 14030
MEMBRANES Alkali Resistant EN 14030
MEMBRANES Chemical Resistant .
MEMBRANES Chemical Resistant EN 14414
MEMBRANES Chemical Resistant EN 14415
MEMBRANES Damp Proofing DPM .
MEMBRANES Gas Barrier .
MEMBRANES Gas Impervious .
MEMBRANES Gas Retardant .
MEMBRANES Gas Retardant Self-Adhesive
MEMBRANES Methane Gas Retardant Methane Barrier
MEMBRANES Radon Barrier .
MEMBRANES Radon Resistant .
MEMBRANES Self Adhesive .
MOBILITY RAMPS Lightweight Portable
PARK LANDSCAPING STRUCTURES .See Also LANDSCAPING: Structures .
PERMANENT Shuttering .
PILE Cap Formwork
PILE Locators .
PILING Accessories .
PILING Infill Sheet piling
POLYTHENE Sheeting .
POLYTHENE Sheeting Temporary
POOLS Ornamental EPS Construction
POOLS Purpose Made EPS Construction
PRIMERS: TYPES Bitumen .
PROTECTIVE Materials .
PROTECTIVE Materials Temporary
PROTECTIVE Sheeting Temporary
RADON Barriers .
RADON Protection Systems .
RADON Sumps .
RAFTS Floating EPS
RAILWAY PLATFORMS Temporary .
RAILWAY SHUTTERING .
RAILWAY TEMPLATE MOULDS
SHUTTERING Bridge Parapets .
SHUTTERING Columns .
SHUTTERING Elements .
SHUTTERING Lining .
SHUTTERING Permanent .
SHUTTERING Purpose Made .
SHUTTERING Re-Usable .
SHUTTERING Specialist .
SHUTTERING Spiral Staircases .
SHUTTERING Stop Ends .
SPACERS Polypropylene .
STAIR FORMERS .
STATION PLATFORMS Temporary .
STRUCTURAL WATERPROOFING Systems .
TANKING Systems .
TANKING Systems Waterproofing Membranes
TEMPLATES Arch Formers .
TEMPLATES Archway .
TEMPLATES Column construction .
TEMPLATES Dished Floor .
TEMPLATES Purpose Made .
TEMPLATES Sloped Floor .
TEMPLATES Special Moulds .
TEMPLATES Staircase Construction .
TEMPLATES Temporary .
THRUST BOXES
TROUGH Moulds .
TROUGH Moulds EPS
TROUGH Moulds Polypropylene
TROUGH Moulds Purpose Made
VENTILATION Cavity Wall (Natural) .
VENTING SYSTEMS Gas/Oil .
VOID FORMERS
VOID FORMERS EPS .
VOID FORMERS Purpose Made .
WAFFLE MOULDS Polypropelene .
WALKWAYS Temporary .
WALL COVERINGS PVC-u Sheet Temporary Protection .
WALL PROTECTION Temporary Correx .
WINDOW FORMERS EPS Purpose Made .
CELLCORE Foundation
CELLCORE HG Ground Heave Protection Panels
CELLCORE HX Ground Heave Protection Panels
CELLCORE HX Hexagonal Ground Movement Protection
CELLCORE PLUS Insulating Ground Heave Protection Panels
CELLFORM Permanent Formwork
CELLFORM HX Formwork with Ground Movement Protection
CELLVENT Gas Venting
CELLVENT HX Gas Venting Ground Heave Protection Panels
CLAYMASTER Foundation Fill
CORBREAK Pilehead Trimming
CORFORM Permanent Formwork System
CORGRID Permanent Formwork Systems
CORREX Polypropylene Sheet
FILCOR Expanded Polystyrene
GROUNDFORM Permanent Formwork
HEAVEGUARD Ground Heave Protection Boards / Sheets
HEAVEGUARD Pile Collars
M MOULD Waffle Moulds
PILECOR Piling Accessories
POWERBASE Gas Membranes
PURAFLEX Gas Membranes
SEEKURE Temporary Protection Sheets
T FORM Trough Moulds
TIPFORM Landfill Engineering
TRIC TRAC Linear Building Spacers
VENTFORM Gas Venting

Cordek launches NEW Bespoke Formwork CPD

January 2019

Cordek is pleased to announce that we now have a NEW Bespoke Formwork Continued Professional Development (CPD) Seminar. Simon Poole, our Business Development Manager, is happy to visit you at your convenience to hold a CPD session.

The presentation lasts approximately 45 minutes, with additional time for questions.

For more information, or to book a presentation for your staff, please contact us: on 01403 799600.

Royal College of Pathologists - Cordek Case Study

December 2018

Royal College of Pathologists

The Royal College of Pathologists have relocated their London Headquarters to the rapidly changing area of Aldgate, on the Eastern fringes of the city. The new seven storey structure replaces an existing office block, providing a flexible and environmentally efficient building to house their growing needs. the building design includes major conference facilities, meeting rooms, offices, a multi-function auditorium, exhibition space, restaurant facilities and accommodation. Cordek were asked by the specialist concrete frame contractor Oliver Connell & Son to devise a formwork system to allow the construction of ribbed concrete floors.

Cordek’s bespoke trough moulds helped us to achieve a high quality consistent concrete finish in line with the Architects specification and delivered to a tight programme.

Project Scope

The project Architects, Bennetts Associates, wanted to showcase visual, exposed concrete as a feature of the building, highlighting the finish that can be achieved from a material often only considered for it’s structural capabilities. The concept was to construct cast in-situ concrete floor slabs with exposed ceiling soffits, using the voids between the ribs to locate the strip lighting design on each floor. The use of a ribbed design reduced the overall depth and weight of the floor slabs, with spans that provided a space virtually uninterrupted by supporting columns. As the exposed concrete soffits would remain ‘as struck’ it was essential that the finished surface was impeccable and that the formwork solution proposed byCordek produced a finish that could be replicated on each floor of the building.


The Solution

The ribbed slabs were formed using a bespoke trough mould solution, manufactured from Glass Reinforced Plastic (GRP), the robustness of which enabled re-use multiple times. Although the design of the ceiling soffits was reoccurring throughout each level of the building, the dimensions of the troughs within them varied between 6.0m and 12.0m long. To ensure consistency throughout, every GRP mould was taken from the same original pattern. The design of the trough moulds incorporated rounded corners, creating the requirement to form a pattern and subsequent moulds with a double curvature, presenting a complex challenge to Cordek’s Project Design Team. The solution was created by 5-axis technology to route a pattern made from epoxy paste with an expanded polystyrene core to create the required finish and profile. Once this process was completed and dimensional accuracy was confirmed using a Faro Arm digital scanner, the GRP moulds were formed from it creating an exact impression.


The Process

Bennetts Associates supplied the 2D drawing of their design proposal, from which the Cordek Project Design Team created a 3D digital model. Following approval of the 3D model, the relevant information was extracted as CAM data and used to create the tool paths for the 5 axis CNC router that was used to shape the epoxy paste pattern. After being routed, the pattern was coated with a highly durable primer to create a smooth but matt surface finish. The moulds were then formed around the pattern using GRP, which was built up in several layers to a thickness of 18mm and strengthened with plywood stiffeners. To achieve the ‘matt’ concrete finish specified by the Architects, the surface of each trough mould required dulling down and gentle exfoliation so that when struck, a gloss or shiny surface finish to the concrete was avoided. Due to the restrictive space on site during construction, the specialist sub-contractor Oliver Connell & Son were only able to construct a single floor at a time. Prior to casting a floor, the trough moulds were positioned in accordance with the proposed design and secured in place by fixing to the elevated timber deck beneath. Once in position, a release agent was applied to both the trough moulds and the exposed timber deck between them to aid striking once the concrete had cured sufficiently. Steel reinforcement was then placed both above and around the trough moulds, supported by spacers to achieve the required cover before the concrete was poured to the appropriate depth. After the concrete had achieved a sufficient cured strength so that the supporting formwork could be struck, the timber deck was lowered from beneath, releasing the trough moulds. Following cleaning, the moulds were manoeuvred through the atrium of the building and into position to follow the same process for the construction of the floor above. As the troughs within the ceiling soffits were to house the light fittings for each floor, ducts were positioned accordingly prior to casting of the concrete, which allowed the project electricians to feed through the wiring needed to provide power to the buildings lighting system.


Summary

When originally conceived, the primary function of forming troughs in a floor slab was to reduce the overall weight of the slab thus allowing the intermediate ribs between the troughs to span considerable distances when compared to conventional designs. However, in the case of this project and many others, it is the aesthetic result of having an exposed cast in-situ concrete soffit design which exposes the ribs and the troughs, that appealed to the project designers. The combined efforts of all those involved, starting with the identification of a cost effective and practical formwork solution, through to the finished construction, meant that the Architects original vision was realised and the reality is a good example of the high end, quality appearance that exposed, cast in-situ concrete can achieve.

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