All you need to operate Window Energy Ratings
ER Certification Ltd - All you need to operate Window Energy Ratings

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Our test laboratory

The ERC Testing Ltd. test laboratory is based in Leigh, Lancashire. It provides testing services for the windows, door and safety glass industries.

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ER Certification extends its Quality Mark

ER Certification Ltd has taken a number of steps to help ensure it continues to provide its clients in the glazing, window and door manufacturing industries with a first-class service...


Mandatory CE Marking

With the introduction of mandatory CE Marking for glass units, toughened safety glass, doors and windows and other construction products being effective from 1st July 2013, ER Certification Ltd extended the scope of its UKAS accreditation in anticipation of increased demand from manufacturers.

The move has helped the company  stay at the head of its field as an Independent Agency for the BFRC Window Energy Rating and Doorset Energy Rating schemes. Combined with its specialism solely within glazing, window and door manufacturing industry, ER Certification Ltd remains perfectly placed to provide efficient and cost-effective solutions to manufacturers.

ER Certification Ltd’s CMS Quality Marks currently include EN1279 for insulating glass units, EN12150 for toughened safety glass and EN14351 for windows & doorsets, with certification undertaken by the company’s team of dedicated glass and fenestration industry professionals.


Secured by Design approval

Following its selection as an approved Secured by Design certification provider, ER Certification Ltd is able to provide a full auditing service for window and door manufacturers seeking to gain Secured by Design approval for their products.

Overseen by the Association of Chief Police Officers (ACPO), Secured by Design is involved in a range of national police projects which seek to ensure that security is designed into both domestic and commercial properties. The organisation uses a number of certification bodies to ensure that approved products are manufactured to agreed quality and performance standards, with ER Certification Ltd licensed to provide the required certification of companies wishing to supply enhanced security windows and doors under the scheme into the UK market. Once approved by a certification body, manufacturers will be accepted into the Secured by Design licensing scheme, which allows use of the Secured by Design logo and the term 'Police Preferred Specification' in marketing collateral.

In order to meet the Secured by Design criteria, ER Certification Ltd will expect window and door manufacturers to be operating a Factory Production Control (FPC) system to comply with the European Standard EN14351 and additionally to have appropriate, independent testing conducted by a UKAS Accredited Test Laboratory at prescribed intervals.

For further information on ER Certification Ltd’s range of services including Secured by Design certification and CE Marking, please contact Bill Keating on 07980 863175 or e-mail




Our CMS Scheme Member Companies

updated: 20/03/2020


All Weather Property Services Ltd Leicester, Leicestershire Windows & Doors
Allied Glazing Systems Ltd Sheffield, South Yorkshire Windows & Doors
Aluminium Windows & Doors Ltd Wymindham, Norfolk Windows & Doors
Architectural & Metal Systems (AMS) Little Island, Cork Windows & Doors
Anglia Fixing Ltd Halstead, Essex Windows & Doors
APH Windows Ltd Telford, Shropshire Windows & Doors
Astra Windows Farnworth, Bolton Windows & Doors
Bison Frames (UK) Ltd Barnsley, South Yorkshire Windows & Doors
Blairs Windows Ltd Paisley, Renfrewshire Windows & Doors
Britplas Commercial Ltd Warrington, Cheshire Windows & Doors
Building Product Solutions Goldthorpe, South Yorkshire Windows & Doors
Carey Glass Chester Limited Chester, Cheshire Insulating Glass Units
Carey Glass Chester Limited Chester, Cheshire Safety Glass
Carey Glass Unlimited Company Nenagh, Ireland Insulating Glass Units
Carey Glass Unlimited Company Nenagh, Ireland Safety Glass
C. A. Goss t/a Direct Window Company Blackpool, Lancashire Windows & Doors
Chigwell Window Centre Hainault, Essex Windows & Doors
Clarke Facades   Clady, County Antrim Windows & Doors
Cornwall Glass (Plymouth)  Plympton, Devon Windows & Doors
Cowen Windows Ltd Whitby, North Yorkshire Windows & Doors
Crystal Clear Group Ltd. Letchworth Windows & Doors
Dekko Window Systems Ltd.         Stockport, Cheshire    Windows & Doors
DEM Window Solutions Barnsley, South Yorkshire Windows & Doors
Diamond Glass Ltd Dublin Insulating Glass Units
Diamond Glass Ltd Dublin Toughened Glass
Direct Trade (Yorkshire) Ltd Doncaster,  South Yorkshire   Windows & Doors
Direct Window Company (also listed under C. A. Goss) Blackpool, Lancashire Windows & Doors
Double R Glass & Roofing Systems Ltd Wellingborough, Northamptonshire Insulating Glass Units
Duralyte Mfg Ltd t/a Lyten Wallyford, East Lothian   Windows & Doors
Ecoglass Ltd Norwich, Norfolk Insulating Glass Units
Edisford Joinery & Construction Ltd Clitheroe, Lancashire Windows & Doors
Energy Saving Glass Kingswinford, West Midlans Insulating Glass Units
ETF Fylde Ltd ta Express Trade Frames  Fleetwood, Lancashire Windows & Doors
Euramax Limited Barnsley, South Yorkshire Windows & Doors
Excell Trade Frames Ltd Worsley, Greater Manchester   Windows & Doors
Ford Windows Sheffield, South Yorkshire  Windows & Doors
Ford Windows - Scotland East Kilbride, South Lanarkshire Windows & Doors
Future Products Mansfield, Nottinghamshire Windows & Doors
GB Joinery  Stockport, Cheshire    Windows & Doors
Gintreda Joinery Ltd Uxbridge, Middlesex Windows & Doors
GJB Holdings Limited Rayleigh, Essex Windows & Doors
Glassline Ltd Polegate, East Sussex Insulating Glass Units
Green Building Store Huddersfield, West Yorkshire Windows & Doors
Hallmark Panels Ltd Hull, East Yorkshire Insulating Glass Units
Heritage Somerfield Group Ltd t/as Heritage Trade Frames Westhoughton, Lancashire Windows & Doors
iAT Innovated Aluminium Technology Derry, Londonderry Windows & Doors
Iceni Witham, Essex Windows & Doors
Jade Windows Brighouse, West Yorkshire  Windows & Doors
John J Higgins Magherafelt, County Londonderry Windows & Doors
Kalsi Plastics t/a Klassic Trade Frames Birmingham Windows & Doors
Kalsi Plastics t/a Klassic Glass Systems Birmingham Insulating Glass Units
Lancashire Double Glazing Ltd Preston, Lancashire Windows & Doors
Lister Central Ltd Fenton, Staffordshire Windows & Doors
MAC Home Improvements Euro Ltd  t/s Windows Direct London Purley, Surrey Windows & Doors
Malplas uPVC Ltd Moy, County Tyrone Windows & Doors
MTF (UK) Ltd Bolton, Lancashire Insulating Glass Units
McIlhatton & Co Ltd Ballymoney, County Antrim Windows & Doors
Merlin Network (Scotland) Ltd  Dunfermline, Fife Windows & Doors
Mr. Window Ltd. Benfleet, Essex Windows & Doors
MTF (UK) Ltd Bolton, Lancashire Windows & Doors
Nichols & Clarke Glass Ltd Fareham, Hampshire Insulating Glass Units
New Trade Windows (Bristol ) Ltd Bristol Windows & Doors
North East Panels Ltd Washington, Tyne & Wear Windows & Doors
Oakland Glass Ltd Dewsbury, West Yorkshire Insulating Glass Units
Oakland Glass Ltd Dewsbury, West Yorkshire Toughened Safety Glass
Olympic Glass Queenborough, Kent Insulating Glass Units
Pearl Window Systems Ltd  Westhoughton, Bolton  Windows & Doors
Pinefield Glass Ltd Elgin, Morayshire   Windows & Doors
Premier (DGU) Ltd Exeter, Devon Insulating Glass Units
Quickslide Ltd. Brighouse, West Yorkshire  Windows & Doors
Ramage (Trade Windows) Ltd Killingworth, Tyneside Windows & Doors
Rapid PVCu Systems  Doncaster, South Yorkshire Windows & Doors
Right Price PVCU Ltd Plympton, Devon Windows & Doors
Roda  Kaisiadorys, Lithuania Windows & Doors
Rooms & Views Manufacturing Ltd t/a Rooms & Views Buckley, Flintshire  Windows & Doors
Rooms & Views Manufacturing Ltd t/a Rooms & Views Tredegar, Blaenau Gwent,  Windows & Doors
Roseview Windows Olney, Buckinghamshire  Windows & Doors
Roundbrand Ltd Armforth, South Yorkshire Windows & Doors
Sanderson Brothers  Preston, Lancashire Windows & Doors
SWC Trade Windows Ltd Scarborough, North Yorkshire Windows & Doors
Sean Timoney Enniskillen, County Fermanagh Toughened Safety Glass
SG Window Systems Ltd Atherton, Greater Manchester  Windows & Doors
Shire Glass Ltd Bedford, Bedfordshire Insulating Glass Units
Solarframe Ltd Rotherham, South Yorkshire Windows & Doors
Spire Windows Ltd Louth, Lincolnshire Windows & Doors
Stargaze Windows  Stockport, Cheshire    Windows & Doors
Stedek Windows & Doors Walsall, West Midlands Windows & Doors
Taunton Joinery Taunton, Somerset Windows & Doors
Tempertech (Wales) Ltd t/a Glamorgan Glazing  Port Talbot, Neath Port Talbot Insulating Glass Units
Tempertech (Wales) Ltd t/a Glamorgan Glazing  Port Talbot, Neath Port Talbot Toughened Safety Glass
Tempertech (Wales) Ltd t/a Glamorgan Glazing  Port Talbot, Neath Port Talbot Windows & Doors
The Ballykelly Group Banbridge, County Down Windows & Doors
The Smashing Glass Company (Nottingham) Ltd Nottingham, Nottinghamshire Insulating Glass Units
The Window Shop Ltd. Carlisle, Cumbria Windows & Doors
UAB Meranti Nemenčinė,   Lithuania Windows & Doors
Vetroseal Ltd Kempston, Bedfordshire Insulating Glass Units
Virtuoso Doors Birtley, County Durham Composite Doors
Vista Therm Limited Lurgan, County Armagh Safety Glass
Vista Therm Limited Lurgan, County Armagh Insulating Glass Units
Warwick Development(NW) Ltd Bootle, Merseyside Windows & Doors
Weatherbreak Windows Ltd. Luton, Bedfordshire Windows & Doors
Weatherbreak Windows Ltd. Luton, Bedfordshire Windows & Doors
Windowright Ltd Telford, Shropshire Insulating Glass Units
Window Solutions Ltd London Windows & Doors