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Superseal Windows Ltd Super Seal are one of Northern Ireland's leading manufacturers of Double Glazed PVC Windows and Doors. We also manufacture GRP Composite Doors (Fire Doors & Secure By Design Doors) as well as Aluminium Windows and Patio Doors. We supply trade installers throughout Northern Ireland and the Republic of Ireland with products of superior quality and offer unparalleled levels of customer service. We strive to maintain high levels of quality in all our products and to constantly improve on the windows and doors which we offer.
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Super Seal started out in 1990. Founded by Kenneth Taylor, Super Seal Window Systems Ltd, is one of Ireland's largest trade suppliers of uPVC windows and doors and incorporates PatioMaster Northern Ireland, part of the PatioMaster franchise. We aimed to be recognised as a highly customer focused supplier of UPVC Windows and Doors, providing truly exceptional products coupled with professional service. Today - a highly successful family-run business based in Castledawson - we are proud to be known as just that.
Super Seal has long since been committed to supporting Government policies and looking to ensure it's projects and operations meet national and local needs, supporting the sustainable development of communities. Reduction of waste levels from company processes, and where practical, recycling waste materials.
ISO 9001 is a certified quality management system (QMS) for organisations who want to prove their ability to consistently provide products and services that meet the needs of their customers and other relevant stakeholders. ISO 14001 is the principal management system standard which specifies the requirements for the formulation and maintenance of an EMS.
Super Seal specialises in manufacturing PVC Windows and doors for both the trade sector and homeowners. Based centrally near Belfast, we have over 30 years of experience in the market, and provide exceptional quality products to customers throughout the UK-Northern Ireland and Ireland. Our range of doors are also available in a wide array of styles and designs, using either system 60 or 70.
Reviews (5)
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Christopher Mayes
Oct 18, 2021
Terrible quailty windows and doors constant issues with them, stay well clear
T. S.
Oct 04, 2021
Asked the receptionist a question, was told someone would call me back. No call came. So not impressed.
Libby Graham
Jan 25, 2021
Still waiting for someone to contact us, after two phone calls to company.
Oliver Moran
Jan 19, 2021
Plenty of choice, Staff were motivated, skilled and friendly
Kat McGuckin
Dec 07, 2018
Front door has been leaking badly since it was installed approximately three years ago. Countless attempts have been made to establish the source of the leak, bits of plastic stuck on outside, not to mention the frame isn't even straight. They now want to take the entire frame and door out causing potential damage to plaster and decoration, only to reinstall the same door and frame which will probably continue to leak.

They have even tried to say the leak is due to our front steps which were not even built when the door was fitted. We have also recently discovered mould upstairs caused by the water leaking in under the windowsills which had to be repaired, all of which causing more inconvenience and stress. I posted this comment on their Facebook which they deleted therefore I recommend caution when choosing to use superseal. I really do hope they realise their responsibility to provide their customers with goods of a suitable standard and to replace items when they are unable to fix them.