A tilt and turn window has one handle and two movements: the top tilts into the room for air, or the whole sash swings in on side hinges like a door. This guide is for British readers: the English rules on escape, replacement and ventilation, and the prices UK guides publish. It recommends no company. I am not a surveyor or a solicitor. How the hardware works is in Tilt and turn windows: how they work.
1. What “tilt and turn” means in UK terms
The Federation of Master Builders (FMB) says these windows are “typically seen in European countries” and becoming popular in the UK. Checkatrade says they are less common here than casements, so fewer installers stock them as standard.
FMB describes three handle positions: down locks the window, up tilts the top in “a couple of inches”, and horizontal swings the sash in “like a reverse casement”. Both movements go into the room, which FMB lists as a drawback.
Sources use the name loosely: Which? says some tilt up to 90 degrees, FMB describes a small tilt. Ask to see both movements. For tilt-only windows, see the comparison.
2. Can it be a fire escape window? (England)
Approved Document B, volume 1 (dwellings), is the English guidance on fire safety. Its paragraph 2.10 says an escape window needs an “unobstructed openable area” with all of these:
- at least 0.33 m²
- at least 450 mm high and 450 mm wide
- the bottom of the opening no more than 1100 mm above the floor
- able to stay open without being held
Locks and stays may be fitted if the stays have child-resistant release catches. Ground-floor habitable rooms (not kitchens) need either an opening onto a hall leading to a final exit or an escape window or door (paragraph 2.1). In a house with one stair, upstairs habitable rooms up to 4.5 m above ground need an escape window or direct access to a protected stairway (paragraph 2.2).
The document does not mention tilt and turn windows. That is my reading, not the document’s: the tilted position opens only a gap at the top, so I would not expect it to give 450 × 450 mm. The turned position might, but the sash, hinges and handle sit in the opening. Only a measured clear opening on your own window answers the question. Checkatrade says the turn position gives access “in an emergency”, which is not a check against Part B.
For replacements, paragraph 2.19 says the new window should give at least the same potential for escape as an old escape window that was big enough. Ask the installer to state the clear opening of each bedroom window in writing.
3. Replacing windows: Building Regulations (England)
GOV.UK lists replacing windows as work that may need Building Regulations approval, and says you need not apply yourself if the installer is registered with a competent person scheme. GOV.UK’s list for replacement windows names Blue Flame Certification, CERTASS, Certsure, Fensa, NAPIT and ASSURE. FENSA says it is the homeowner’s job to register the work with the council unless a FENSA installer does it, and that without a certificate you may pay for a building control inspection.
Approved Document L, volume 1 (2021 edition with 2023 amendments, in force today for England):
- A complete new or replacement window should be draught-proofed and have a U-value of 1.4 W/m²K or better, or Window Energy Rating Band B or better (Table 4.2).
- Replacing only the glass, or a window in its existing frame, does not need to meet that standard (paragraph 10.6).
- If the character of the building prevents it, a centre-pane U-value of 1.2 W/m²K, or secondary glazing, is the fallback (paragraph 4.10).
- A 2026 edition takes effect in England on 24 March 2027. Its window figure is the same.
Approved Document F, volume 1 (paragraphs 3.14 and 3.15, same wording in the 2026 edition): if the old windows had trickle vents, the new ones need controllable vents at least as large. If not, the document gives 8,000 mm² for habitable rooms and kitchens and 4,000 mm² for bathrooms, or other ventilation shown to building control. Energy Saving Trust says to keep trickle vents open. In a conservation area, an Article 4 area or a listed building, check with the planning office first.
Scotland and Northern Ireland differ and I do not cover them. Energy Saving Trust says to ask the council’s building standards office in Scotland whether you need a building warrant. Wales has its own approved documents (GOV.WALES lists them), which I could not read, so treat this section as England only.
4. uPVC, aluminium or timber
Which? says uPVC is the most common frame and “up to three times cheaper” than traditional wood, timber needs maintenance, and aluminium is strong, slim and low maintenance. FMB gives lifespans of up to 25 years for uPVC, up to or over 30 for aluminium and at least 60 for timber, with no test cited. FMB adds that timber is often required in conservation areas and listed buildings. Part L sets the same window standard whatever the material, and a timber allowance ended on 14 June 2023.
More: PVC or aluminium, aluminium with a thermal break, old wooden and sash windows.
5. What UK price guides publish
I give no average of my own. These are published figures, read on 4 November 2026:
| Source | Figures |
|---|---|
| Checkatrade (updated July 2026) | uPVC, fitted: £490 for 800 × 800 mm, £695 for 1,200 × 1,200 mm. Aluminium: £150 to £300 more per window to supply. Tilt and turn about 25% above a casement. |
| MyBuilder (updated 21 August 2026) | £400 to £1,500 per window. uPVC £400 to £700, aluminium £600 to £1,500, timber £800 to £1,500. Labour £150 to £400. |
| FMB (page dated 15 January 2026) | uPVC £670 to £835, aluminium £875 to £1,085, timber £2,040 to £2,515. It does not say per what. |
| Energy Saving Trust (updated 20 May 2026) | A-rated windows for a semi-detached house “around £4,800”. Not specific to tilt and turn. |
Sources disagree. Timber is £800 to £1,500 at MyBuilder and over £2,000 at FMB. Checkatrade gives two aluminium premiums (20 to 40%, and £150 to £300) and says its calculator is AI-generated from past jobs. Only a written quote is a price.
6. Problems and security
Checkatrade lists the swing path needing clear space and 4 to 8 weeks for bespoke sizes against 2 to 4 for stock uPVC. FMB says the window is “more complex to fix if broken”. Checkatrade says multi-point locking makes forced entry harder than on a standard casement. That is a trade claim with no test shown. For maintenance, faults and the less-locked tilted position, see how they work, when it will not open or close and security classes.
7. Living in Portugal?
The English rules above do not apply there. Portuguese quotes call it janela oscilobatente. Start with Replacing windows in Portugal, then can I replace my windows?, grants, how to check a company and the glossary.
What I could not confirm
- Whether the tilt or turn position of any given window meets paragraph 2.10: no source says so.
- The Welsh approved documents, and whether the competent person schemes apply the same way in Wales. GOV.UK’s page does not say.
- The Which? cost page (members only). FMB’s unit of price. Scotland and Northern Ireland.
- UK security standards for windows: I did not read them.
Sources
Read on 4 November 2026:
- GOV.UK: Approved Document B vol. 1 (page updated 16 September 2026), Approved Document L vol. 1, 2021 edition and 2026 edition, Approved Document F vol. 1, 2021 and 2026 edition.
- GOV.UK: building regulations approval and competent person schemes (updated 17 September 2026). GOV.WALES: approved documents.
- FENSA: homeowners.
- FMB: tilt and turn windows, Checkatrade: tilt and turn windows cost, MyBuilder: tilt and turn price guide.
- Which?: types of double glazing (16 September 2026) and Energy Saving Trust: windows and doors.