- Postcode district
- BT47
- Survey
- Free, area covered by arrangement
- Typical lead time
- Typically 4–6 weeks for aluminium, 6–8 weeks for slimline or lift and slide corners, from survey sign-off
- Guide price
- From £8,695 inc VAT
- Nearby
- Strabane, Limavady, Dungiven
- Building rules
- Northern Ireland
Corner sliding doors in Derry/Londonderry: what to know
The right door depends on the opening, the room and the way you use the garden. Here is how corner sliding doors tend to work out in practice:
On any corner installation in Derry/Londonderry, the survey records floor and patio levels along both walls, because a terrace that falls differently on each side changes the threshold detail.
Which way does your Derry/Londonderry garden face? A corner catching south and west sun gains warmth in winter but can overheat in summer, so solar-control glass is worth considering.
- Low or flush thresholds can run around both elevations, giving one continuous level line from the floor inside to a terrace that wraps the corner.
- Because panels slide rather than fold, the corner can be opened on one side only, keeping the other side closed as a wind screen on cooler days.
- A corner of glass gives a much wider field of view than a single straight door, taking in more of the garden from a seat inside.
Sunlight, glass and orientation in Derry/Londonderry
The midday sun over Derry/Londonderry ranges from about 12° at the winter solstice to about 58° at midsummer. Low-angle winter light reaches further into a room through a tall door, which is one reason taller panels are worth considering; on south or west walls, pair them with solar-control glass.
Guide prices for corner sliding doors in Derry/Londonderry
Pricing does not change because you are in Derry/Londonderry: the ranges below include fitting, structural calculations and VAT. The steelwork that supports the corner is designed by the engineer and priced after survey, because it depends on the building.
| Overall width | Typical panels | Guide price (fitted, inc VAT) |
|---|---|---|
| 3.0 m | 4 panels | £8,695–£10,595 |
| 3.6 m | 4 panels | £9,595–£11,795 |
| 8.0 m | 6 panels | £16,495–£20,095 |
See every size on the corner sliding doors page or try the guide price tool.
What happens when you order corner sliding doors in Derry/Londonderry?
Here is the usual sequence in Derry/Londonderry: guide price, free survey, written quote, any building work, then manufacture (typically 4–6 weeks for aluminium, 6–8 weeks for slimline or lift and slide corners, from survey sign-off). Fitting typically takes 1–2 days for the door, after 3–5 days of structural building work. Nearby, we also survey in Strabane, Limavady and Dungiven. Derry/Londonderry is in an area we cover by arrangement: the survey is still free, and survey dates, delivery and any travel cost for delivery and fitting are confirmed in your quote before you order.
Do you need approval in Derry/Londonderry?
In Northern Ireland, structural alterations need approval from your district council's building control service before work starts. New openings in Northern Ireland are by arrangement.
Which options matter for corner sliding doors?
- Threshold. Standard, low or flush thresholds, with drainage detailed along both elevations.
- Colours. Single or dual colour powder coating, so the outside can match the extension cladding or render.
- Panel layout. Two panels per side for smaller corners or three per side for wider ones, with fixed panels at the far ends.
Questions about corner sliding doors in Derry/Londonderry
Do you fit corner sliding doors in Derry/Londonderry?
Yes, by arrangement. Derry/Londonderry is in an area we cover by arrangement: the survey is still free, and survey dates, delivery and any travel cost for delivery and fitting are confirmed in your quote before you order.
Do corner sliding doors need a steel beam?
Corner sliding doors almost always need engineered structural support, because removing the corner post takes away the support for the wall or roof above. A structural engineer designs a cantilevered beam or steel frame; the calculations are included in our guide prices and the steelwork is priced after survey. In England this needs a Building Regulations application and in Scotland a building warrant; Wales and Northern Ireland have their own building control rules.
Can I add a corner sliding door to an existing house?
A corner sliding door can be added to an existing house, but it is a structural project rather than a door swap: the corner of the building has to be rebuilt with engineered steel to carry the load where the post or wall used to be. It is usually done as part of an extension or rear remodel, and a survey plus an engineer's assessment confirm what the structure above needs.
How do you maintain a corner sliding door?
Maintaining a corner sliding door is much like any aluminium slider, with extra attention to the corner: keep both tracks and the corner drainage clear, wipe the corner seals, and check the meeting panels still lock smoothly. Rollers can be adjusted if a panel drops. Because a new extension can settle slightly in its first year, the corner panels may need a small adjustment after that.