Areas · South Glamorgan
Triple glazed windows and doors in Cardiff
Here is everything we supply and fit in Cardiff: windows by frame and style, doors, glass upgrades and whole-house projects, each with a local page and guide prices.
We supply and fit triple glazed windows, doors and glass upgrades in Cardiff and across South Glamorgan, with a free survey and a written quote that fixes the price.
Products in Cardiff
Choose a product to see local guide prices for Cardiff and what the Wales rules mean for it.
Windows by frame material
Window styles
- Casement windows
- Flush casement windows
- Tilt and turn windows
- Sash windows
- Bay and bow windows
- Fixed and picture windows
Doors
Glass and upgrades
Projects
- Whole-house replacement
- New builds and self-builds
- Period homes and conservation areas
- Flats and apartments
- Passivhaus and EnerPHit
Winter light in Cardiff
In Cardiff, the shortest day brings around 7 h 50 min of daylight, with the midday sun near 15°. Over a heating season of several months, lower heat loss through the glass adds up.
Rules in Wales
The rules for replacement windows in Wales are set by Approved Document L for Wales (2022 edition, with 2024 amendments): 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.
- Free survey and a written quote fixed for the specification
- Glass build-up and whole-window U-value on every quote
- Written handover pack at the end of the job
- Guarantees on frames, units and fitting in writing
Questions
Are there grants for triple glazing in Wales?
Rarely. Most schemes fund insulation and heating before glazing. See our regulations and funding guide for the current position.
How long does fitting take in Cardiff?
Most homes are fitted in 1 to 4 days once the windows are made; manufacture takes about 4 to 12 weeks depending on the frame.
Do I need planning permission in Cardiff?
In Wales, householder rules do not cover flats, councils can use Article 4 directions, and listed buildings need consent. Check whether your street is in a conservation area before changing the style.
How much does triple glazing cost in Cardiff?
Our guide prices are the same UK-wide: triple glazed uPVC windows from £695 each and a 3-bed semi from £9,395, fitted and inc VAT.
Nearby towns
Penarth (5 km), Caerphilly (11 km), Barry (12 km), Risca (15 km), Newport, Gwent (17 km).
Triple glazing in Cardiff
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.