- Postcode district
- CF45
- County or region
- Mid Glamorgan
- Survey
- Free for new and replacement doors
- Daylight
- 7 h 48 min (December) to 16 h 40 min (June)
- Nearby
- Aberdare (6 km north-west), Merthyr Tydfil (7 km north), Tonypandy (9 km south-west)
Sliding doors we fit in Mountain Ash
Each link opens local guide prices and details for Mountain Ash.
How much sun will a door in Mountain Ash get?
At the latitude of Mountain Ash, the midday sun climbs to about 62° in late June but only about 15° in late December, when daylight lasts around 7 h 48 min against 16 h 40 min in midsummer. A south-facing sliding door lets that low winter sun deep into the room; on a west or south elevation, solar-control glass keeps summer afternoons comfortable.
How it works in Mountain Ash
Every job in the CF45 district follows the same steps: price online, survey, written quote, made-to-measure manufacture and fitting, with the compliance certificate sent to you.
Approvals in Wales
Wales sets its own Building Regulations guidance, including Approved Document L (Wales) for energy. A replacement sliding door must meet those requirements and use safety glass, and we arrange compliance through a registered installer or the local Building Control service.
Sliding doors in Mountain Ash: questions
Who fits the doors in Mountain Ash?
Doors are fitted by installers we appoint and manage under our contract, so your contract and guarantees stay with us. The same surveyed specification goes from the quote to the factory to the fitters.
Can you widen my opening in Mountain Ash?
Yes. We can form or widen an opening for a larger sliding door, with structural calculations, a steel beam and Welsh approvals arranged. That work is quoted alongside the door.
How much are sliding doors in Mountain Ash?
Guide prices are the same across mainland Britain. A 2.4 m wide aluminium door is a guide £4,295–£5,295, fitted, including VAT; uPVC starts from £1,695. Your exact price is fixed after survey.

