- Postcode district
- HA1
- Survey
- Free for new and replacement doors
- Typical lead time
- Typically 8–10 weeks from survey sign-off
- Guide price
- From £5,095 inc VAT
- Nearby
- Pinner, Wembley, Ruislip
- Building rules
- England
Is a timber and alu-clad sliding door a good fit for your home in Harrow?
The right door depends on the opening, the room and the way you use the garden. Here is how timber and alu-clad sliding doors tend to work out in practice:
Whether you live in Harrow or elsewhere in Greater London, an exposed coastal or hilltop elevation makes a strong case for alu-clad rather than all-timber outside.
Because timber and alu-clad sliding doors typically take 8–10 weeks to make, a Harrow building programme runs more smoothly when the survey happens as soon as the opening size is fixed.
- Many timber systems use lift and slide hardware, letting large, heavy panels glide easily and then settle onto compressed seals for a tight closure.
- The inside face can be finished to match existing oak floors, stair parts or window boards, so the new door feels part of the room rather than an addition.
- Engineered timber is laminated from several layers with the grain opposed, so frames resist the twisting and warping that solid timber can suffer as the seasons change.
Planning glass for the light in Harrow
Daylight in Harrow runs from about 7 h 49 min in December to 16 h 39 min in June, with the noon sun at roughly 15° and 62° respectively. Use that to choose your glass: standard low-E double glazing for north and east elevations, and consider solar-control or triple glazing for sunny south and west walls.
Guide prices for timber and alu-clad sliding doors in Harrow
The table shows guide prices for common sizes, supplied and fitted, including VAT. Your exact price is fixed in a written quote once the opening in your Harrow home has been measured.
| Overall width | Typical panels | Guide price (fitted, inc VAT) |
|---|---|---|
| 2.4 m | 2 panels | £6,495–£7,995 |
| 3.0 m | 2 panels | £7,495–£9,095 |
| 3.6 m | 3 panels | £8,395–£10,295 |
See every size on the timber and alu-clad sliding doors page or try the guide price tool.
Survey, manufacture and fitting around Harrow
Surveys in the HA1 district are booked at a time that suits you. After you approve the quote, manufacture is typically 8–10 weeks from survey sign-off; on fitting day the old door comes out, the new frame is set level and sealed, and the panels are adjusted so they glide properly. Fitting usually takes 1 day for a two-panel swap; 1–2 days for larger doors.
Do you need approval in Harrow?
In England, a replacement sliding door is a controlled fitting under the Building Regulations. In an existing home, a door with more than 60% glazing must reach a U-value of 1.4 W/m²K or better (or a Doorset Energy Rating of band C) under Approved Document L, and glass in doors must be safety glazing under Approved Document K. We arrange compliance through a competent person scheme installer or by notifying Building Control, and you receive the certificate.
Choosing the specification
- Glass. Double or triple glazed safety glass, with slim glazing bars available for a period look.
- Interior finish. Clear lacquer, a wood stain or a painted colour, chosen to match floors, beams or kitchen units.
- Timber species. Oak or another hardwood for a visible grain, or engineered softwood where a painted finish is planned.
Questions about timber and alu-clad sliding doors in Harrow
How soon can you survey in Harrow?
Surveys in the HA1 district are booked at a time that suits you, and we offer survey dates when we reply to your enquiry. After you approve the written quote, manufacture is typically 8–10 weeks from survey sign-off.
Are timber sliding doors secure?
Timber sliding doors are secure when built with multi-point locking, laminated glass and robust sections, because engineered timber gives the locking keeps a solid, dense fixing. Timber systems are available tested to PAS 24, the UK enhanced security test standard for doorsets. Internally beaded glass and a key-locking handle add further resistance to forced entry.
What is the difference between timber and alu-clad sliding doors?
The difference is the outside face: a timber sliding door is wood inside and out, while an alu-clad door has a powder-coated aluminium shell fixed over the exterior timber. Alu-clad needs only washing outside and comes in any RAL colour; all-timber needs periodic re-coating but keeps a natural wood look on both faces. The inside is timber either way.
Are timber sliding doors energy efficient?
Timber sliding doors are energy efficient because wood insulates naturally, and engineered timber systems typically achieve whole-door U-values comparable with good thermally broken aluminium, depending on the glass. In England, a new or replacement door in an existing home with more than 60% glazing must reach 1.4 W/m²K or better, and the glazing is specified to meet that. Wales, Scotland and Northern Ireland set their own energy rules.