Bay and bow windows · Wales
Triple glazed bay and bow windows in Mid Glamorgan
From Rhondda to Maesteg, we arrange triple glazed bay and bow windows for homes across Mid Glamorgan, with every quote fixed for the specification shown.

Warmer front rooms on 1930s and Victorian homes. A bay window projects out from the wall in angled sections; a bow window curves in more, shallower sections.
Guide prices across Mid Glamorgan
3-light bay
three windows, about 2.7 m across
£2,995 – £3,795inc VAT · £2,495 – £3,160 ex VAT
- Triple glazed throughout
- Old frames removed and taken away
- Fitted, sealed and made good
5-light bay or bow
five windows, about 3.5 m across
£3,795 – £4,695inc VAT · £3,160 – £3,910 ex VAT
- Triple glazed throughout
- Old frames removed and taken away
- Fitted, sealed and made good
Two-storey bay
ground and first-floor bays
£5,995 – £7,495inc VAT · £4,995 – £6,245 ex VAT
- Triple glazed throughout
- Old frames removed and taken away
- Fitted, sealed and made good
Guide prices, supply and fit. The written quote after your survey fixes the price for the specification shown; anything extra is agreed with you first.
Towns in Mid Glamorgan
Rules in Wales
In Wales, replacement windows must meet 1.4 W/m²K, or a Window Energy Rating of band B or better. As in England, replacement windows are a controlled fitting: a competent person scheme installer self-certifies the work, or building control approves it.
Before ordering: Householder permitted development rules do not cover flats, and councils can remove rights with Article 4 directions. Listed buildings need listed building consent. Check with your council before changing the style or material.
How it works
We start with a survey, not a sales pitch: measurements, the structure above any bays, trickle-vent needs and escape windows. The quote that follows fixes the price, and anything unexpected on the day is agreed with you first.
- Guide prices published, not hidden
- No pressure: the quote is yours to keep
- Frames, glass and fitting in one contract
- Advice on planning and consents before you order
Questions
Will the bay be warmer?
Yes. Replacing old double or single glazing in a bay with triple glazing cuts heat loss through the glass and makes the glass surface warmer, so the room feels less draughty.
Do bay windows need bay poles?
If the old frames carry load from above, yes. We check on survey and include support in the quote where needed.
Can I change a bay to a flat window?
That is a structural and planning change, not a like-for-like replacement. Ask and we will explain what it involves.
Do you cover all of Mid Glamorgan?
We arrange surveys and fitting across Mid Glamorgan.
Do I need permission for triple glazed bay and bow windows in Wales?
In Wales, householder rules do not cover flats, councils can use Article 4 directions, and listed buildings need consent.
Bay and bow windows in nearby areas of Wales
Other products in Mid Glamorgan
- uPVC windows
- Aluminium windows
- Timber windows
- Alu-clad timber windows
- Casement windows
- Flush casement windows
- Tilt and turn windows
- Sash windows
- Fixed and picture windows
- Composite front doors
- French doors
- Sliding patio doors
- Bifold 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
Bay and bow windows across Mid Glamorgan
Written quote fixed for the specification, after a free survey. Building Regulations sign-off by a competent person scheme installer or building control, as the law requires in Wales.
