- Zenith Windows
 - Offers the sale and installation of PVC-U double glazed windows and doors. - PC Henderson
- Producing garage doors and commercial, domestic, and industrial sliding and folding door hardware.
- Everest Home Improvements
- Supplies conservatories, replacement windows, double glazing, and garage doors.
- Bowater Home Improvements Ltd.
- Supplier of double glazed doors and windows.
- Crittall Windows
- Designs, manufactures and installs steel and aluminium windows, cladding and curtainwall systems in new construction and refurbishment projects worldwide.
- Sash Window Workshop Ltd
- Specialises in the production and restoration of double glazing, draft and sound-proofing, and repair of existing wooden sash windows.
- Door Store
- Offers an extensive range of doors, mouldings, floors, staircasing, handles, and associated hardware.
- Bolton Brady
- Manufacture, supply, maintain, and install a large variety of industrial and commercial doors and grilles.
- Classic PVC Home Improvements Ltd
- Double glazing specialists. Suppliers and installers of pvc windows, doors, conservatories, and door canopies.
- Heywood Williams (6)
- Rol-Trac Ltd
- Designers and manufacturers of specialised automatic doors.
- Scotts of Thrapston
- Specialise in the manufacture of stables and equestrian buildings, joinery, timber engineering, period windows, performance doors, and gazebos and pavilions.
- Automated Control Services
- Provides construction products such as smoke ventilation systems, automated gates and door access control systems, plus tubular skylights, light pipes, and roof windows.
- S. Notaro Holdings Ltd.
- Involved in property development and the manufacturing of windows, doors, and conservatories.
- SCI Windows and Doors
- Supplies and installs replacement windows, entrance doors, patio/French doors, and other specialist services and products.
- Interframe Ltd
- Manufacturer of PVC-U windows, doors and conservatories.
- CR Smith
- Specialises in conservatories, doors, roof cladding, and double glazing.
- Lochinvar Windows Ltd
- Provides windows, door and conservatories to East Central Scotland.
- Window Superstore
- Direct trade supplier of PVCu double glazing for windows, doors, and conservatories.
- Cardigan Windows Ltd
- Custom made conservatories, double glazing, and garage doors.
- DWC Trade Windows
- Supplies PVC-U windows to the trade and the DIY enthusiast.
- Altex
- Manufacturers and installers of windows, doors, and conservatories.
- Heritage Sash Window Company
- Specialises in draft-proofing and renovation for timber windows and doors.
- Anglian Group plc (2)
- Apple Conservatories
- Builds and installs conservatories, windows, and doors. Also supplies conservatory furniture.
- PVCu Double Glazing - Instant Online Estimates
- Network of manufacturers specialising in instant online estimates, avoiding salesmen and cowboys.
- PM Windows
- Manufacturers of supplied and fitted PVCu conservatories, windows, and doors.
- Bygone Collection
- Manufacturer and retailer of unique uPVC and wooden sash windows in a traditional style to match the character of old buildings.
- Distinctive Doors
- Specialist suppliers of domestic doors, external doors, internal doors, and more. Selection includes a variety of oak and hardwood doors available for home and business applications across the UK.
- Henry James Doors
- Learn more about the Henry James Doors line of bespoke bi-fold, patio, French, and residential doors and sash windows. Built in aluminium, timber, alu-clad timber, and PVC.
- Lakes Garage Doors
- Offering online sales of garage doors, garage door openers, gates and gate automation. Also offers installation of garage doors, openers, and automatic gates.
- Par Louvre Systems
- Specialist contractor and fabricator of a variety of Brise Soleil and solar shading products.
- Rainbow Plastics Ltd.
- Specialists in profile bending.
- West Yorkshire Windows Limited
- Installers of uPVC windows, doors, and conservatories in West Yorkshire.
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