Mountain Ash at a glance
- Postcode districts
- CF45
- Population
- about 11,230 (GeoNames)
- Council area
- Rhondda Cynon Taf County Borough Council
- Building approval
- Rhondda Cynon Taf County Borough Council building control, or a registered building control approver
- Nearest main town
- Rhondda, about 3 miles
- Guide price region
- Wales (−8% on West Midlands rates)
What flat roof work do we do in Mountain Ash?
EPDM rubber roofing
For landlords with property in Mountain Ash, EPDM's low upkeep is the main draw: once the outlets are kept clear and the trims are checked once or twice a year, there is little else to do. It also goes down quickly on a small roof, which keeps disruption for tenants to a minimum.
Commercial flat roofing
When a roof over heated space in Mountain Ash is replaced, insulation rules usually apply. We design the warm-roof build-up towards the required standard where that is feasible and handle building control where it is needed, so the work is signed off properly and the building is better insulated afterwards.
Torch-on felt roofing
Torch-on felt suits property owners in Mountain Ash who want a dependable, layered roof without paying the top price per square metre. With two or three bonded layers, a single small defect in one sheet need not lead to a leak, which is a real advantage on larger roofs that are hard to inspect often.
All flat roof services in Mountain Ash:
- Single-ply membrane roofing
- EPDM rubber roofing
- Green and sedum roofs
- Commercial flat roofing
- Garage roofs
- Flat roof repairs
- Dormer roofs
- Balconies and roof terraces
- Flat roof surveys and leak tracing
- Flat roof replacement
- Extension and kitchen roofs
- Emergency leak repairs
- GRP fibreglass roofing
- Warm roof insulation upgrades
- Liquid-applied roofing
- Torch-on felt roofing
- Flats, HMOs and block roofs
How much does a flat roof cost in Mountain Ash?
Guide prices at Wales rates including VAT. New and replacement roofs get a fixed price after a free survey; repair prices are confirmed once we've found the problem.
| Job | Guide price inc VAT |
|---|---|
| Single garage (18 m²), liquid-applied | £1,900–£3,000 |
| Extension (20 m²), EPDM, new deck + insulation | £2,600–£4,500 |
| Localised patch repair | £140–£460 |
| Extension (20 m²), EPDM, insulation + 1 rooflight upstand | £2,750–£4,800 |
| Single garage (18 m²), GRP fibreglass | £1,650–£3,000 |
What flat roofs are typical in and around Mountain Ash?
In a town like Mountain Ash flat roofs are mostly on 1930s semis with flat-roofed garages and kitchen extensions and shops with flat-roofed rear stores below flats. Weather matters on a flat roof. Wales averages roughly 1,460 mm of rain a year, among the wettest in Britain, so we design for steady run-off: proper falls, clear outlets and upstands well above the finished roof. Approximate 1991–2020 regional averages based on Met Office data.
Who approves flat roof work in Mountain Ash?
Where approval is needed it goes to Rhondda Cynon Taf County Borough Council building control, or a registered building control approver. Welsh guidance is that most re-roofing needs building control approval, so it's worth checking whenever more than a quarter of a roof is replaced or repaired. How the rules work.
Which places near Mountain Ash do we cover?
Flat roofing in Mountain Ash: questions
Do you cover Mountain Ash?
Yes, including postcode districts CF45. Send your postcode with your enquiry and we'll arrange a survey.
Can you repair a leaking flat roof in Mountain Ash?
Yes. We trace where the water is actually getting in first, because the leak inside is rarely under the defect outside, then repair with materials compatible with your roof.
Do you also cover Treharris?
Yes. Treharris is about 3 miles from Mountain Ash and we cover it too.
How much is a new flat roof in Mountain Ash?
A typical 18 m² EPDM garage roof is £1,450–£2,600 and a 20 m² insulated EPDM extension roof is £2,600–£4,500, at Wales guide rates including VAT.