Established over 35 years ago, John Williams is one of the largest home improvement companies in North Wales and the North West of England.
We are specialists in the design manufacture and installation of high quality double glazed products. Including Windows, Doors and Conservatories.
Manufacturing » Kite Marks and Quality Assurance
Quality by Independant Assessment
The standards we set have earned our Company and products 5 BSi Kitemarks and 2 BSi Registered Firm awards.
Installation quality
One of the accreditations we have received is for installation of our products - This makes us one of only a handful of companies in our industry to achieve this status.
BSI - BS EN ISO 9001:2000
Licence number FM34896
For manufacturing.
BSI - BS EN ISO 9001:2000
Licence number FM20320
For Installations and Customer Care
British Standard BPFW362
Licence number KM501314
For Survey and Installation of
Replacement Windows and Doors
British Standard BS6206
Licence number KM62202
For Safety Glass
British Standard BS7950/7412
Licence number KM34487
For Improved Security PVC-u Windows
British Standard BS5713
Licence number KM30988
For Sealed units
British Standard BS7412
Licence number KM34486
For PVC-u Windows
NO OTHER COMPANY IN OUR OPERATIONAL AREA COMPARES!
