Areas · County Londonderry
Triple glazed windows and doors in Derry
Here is everything we supply and fit in Derry: windows by frame and style, doors, glass upgrades and whole-house projects, each with a local page and guide prices.
We supply and fit triple glazed windows, doors and glass upgrades in Derry and across County Londonderry, with a free survey and a written quote that fixes the price.
Products in Derry
Each link opens the Derry 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 Derry
Northern winters are long: in Derry the shortest day gives about 7 h 10 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.
Before ordering: 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
You will know exactly what you are buying: the quote states the unit build-up, frame, finish, fitting work and how Building Regulations compliance is handled. On fitting day each opening is replaced and closed up before the team moves on.
- 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
Do I need planning permission in Derry?
In Northern Ireland, check with your council planning office before changing the style, material or size of windows, and always for listed buildings and flats. Check whether your street is in a conservation area before changing the style.
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.
Which frame is best for a house in Derry?
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 Derry?
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
Strabane (22 km), Limavady (24 km), Coleraine (44 km), Omagh (44 km), Ballymoney (52 km).
Triple glazing in Derry
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.