Bifold doors · County Londonderry
Triple glazed bifold doors in Coleraine
If you live in Coleraine (BT51) and want triple glazed bifold doors, start with a free survey: every opening measured, then a written quote that fixes the price.
Slim, strong bifolds rated for heavy triple glass. Bifold doors are made of several panels hinged together that fold and slide to one or both sides, opening almost the full width of the opening.
Winter light and glass choice in Coleraine
In Coleraine, midday sun in late December sits around 11° high, with roughly 7 h 08 min of daylight. For windows facing north or shaded by neighbours, cutting heat loss matters more than solar gain; on open south-facing glass, ask about a higher solar-gain unit.
Guide prices in Coleraine
| Guide | Supply and fit, inc VAT |
|---|---|
| 3-panel bifold about 2.4 m wide, aluminium | £4,295 – £5,395 |
| 4-panel bifold about 3.2 m wide, aluminium | £5,295 – £6,695 |
| 5-panel bifold about 4 m wide, aluminium | £6,295 – £7,895 |
Guide prices. Your written quote after the free survey fixes the price for the specification shown.
Rules for bifold doors in Northern Ireland
Northern Ireland sets replacement door limits through Technical Booklet F1 (2022): 1.8 W/m²K. Replacing 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 doors, and always for listed buildings, conservation areas and flats.
How it works
The surveyor measures every opening, checks ventilation, escape windows and safety-glass zones, and talks through styles. Your written quote lists each item with its glass build-up and U-value, and the price is fixed for that specification.
- 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 from Coleraine
Do I need building regulations for new bifolds?
Replacing an existing door is covered by the replacement rules. A new or widened opening is structural work that needs building control approval.
Are bifold doors secure?
Good systems lock at multiple points on each panel and use anti-snap cylinders. We specify tested doorsets where available.
Do you fit triple glazed bifold doors in Coleraine?
Yes. We arrange surveys and fitting in Coleraine and across County Londonderry. Send your postcode and the windows or doors you want replaced, and we will book a free survey.
Do I need permission for triple glazed bifold doors in Coleraine?
In Northern Ireland, check with your council planning office before changing the style, material or size of a door, and always for listed buildings and flats. Check whether your street is in a conservation area or covered by an Article 4 direction before changing the style.
Nearby
We also cover nearby Ballymoney (12 km), Limavady (20 km), Ballymena (39 km) and Magherafelt (42 km).
Other products in Coleraine
- uPVC windows
- Aluminium windows
- Timber windows
- Alu-clad timber windows
- Casement windows
- Flush casement windows
- Tilt and turn windows
- Sash windows
- Bay and bow windows
- Fixed and picture windows
- Composite front doors
- French doors
- Sliding patio doors
- Glass-only replacement
- Acoustic triple glazing
- Security glazing
- Whole-house replacement
- New builds and self-builds
- Period homes and conservation areas
- Flats and apartments
- Passivhaus and EnerPHit
Bifold doors in Coleraine: book your free survey
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.