Areas · County Antrim
Triple glazed windows and doors in Belfast
From Belfast to nearby Castlereagh and Newtownabbey, we arrange surveys and fitting of triple glazed windows, doors and glass upgrades.
We supply and fit triple glazed windows, doors and glass upgrades in Belfast and across County Antrim, with a free survey and a written quote that fixes the price.
Products in Belfast
Each link opens the Belfast page for that product, with guide prices, the rules in Northern Ireland and a quote form.
Windows by frame material
Window styles
- Casement windows
- Flush casement windows
- Tilt and turn windows
- Sash windows
- Bay and bow windows
- Fixed and picture windows
Doors
Glass and upgrades
Projects
- Whole-house replacement
- New builds and self-builds
- Period homes and conservation areas
- Flats and apartments
- Passivhaus and EnerPHit
Winter light in Belfast
Northern winters are long: in Belfast the shortest day gives about 7 h 15 min of daylight. Cutting heat loss through the glass, especially on north and east faces, is the main gain from triple glazing here.
Rules in Northern Ireland
In Northern Ireland, replacement windows must meet 1.6 W/m²K, or a Window Energy Rating of band C or better. Replacing windows or external doors does not need full plans or a building notice, but the work must still comply; enlarging an opening or other structural change needs building control approval.
Planning: Check with your council planning office before changing the style, material or size of windows or doors, and always for listed buildings, conservation areas and flats.
How it works
After the free survey you get a written quote naming the frame system, the glass build-up and the whole-window U-value for every item. Windows are made to order, then fitted, sealed and made good, one opening at a time.
- Every opening measured, including escape and vent needs
- Frames rated for the weight of triple glass
- Old windows removed and taken away
- Each opening closed up the same day
Questions
Are there grants for triple glazing in Northern Ireland?
Rarely. Most schemes fund insulation and heating before glazing. See our regulations and funding guide for the current position.
Do you fit triple glazing in Belfast?
Yes. We arrange surveys and fitting in Belfast and the BT1 district. Send your postcode and what you need, and we will book a free survey.
Which frame is best for a house in Belfast?
It depends on the house rather than the town: uPVC for value, aluminium for slim frames and big panes, timber for period homes, alu-clad timber for low upkeep. Our surveyor will talk through the options.
How much does triple glazing cost in Belfast?
Our guide prices are the same UK-wide: triple glazed uPVC windows from £695 each and a 3-bed semi from £9,395, fitted and inc VAT.
Nearby towns
Castlereagh (4 km), Newtownabbey (7 km), Holywood (8 km), Lisburn (11 km), Newtownards (15 km).
Triple glazing in Belfast
Written quote fixed for the specification, after a free survey. No building notice is needed for a straight replacement in Northern Ireland; we fit to the regulations and give you a written handover pack.