Treharris at a glance
- Postcode districts
- CF46
- Population
- about 12,352 (GeoNames)
- Council area
- Merthyr Tydfil County Borough Council
- Building approval
- Merthyr Tydfil County Borough Council building control, or a registered building control approver
- Nearest main town
- Rhondda, about 6 miles
- Guide price region
- Wales (−8% on West Midlands rates)
What flat roof work do we do in Treharris?
EPDM rubber roofing
If your Treharris roof has been patched more than once and the felt is cracking or blistering, a full replacement in EPDM can be better value than another repair. The rubber stays flexible through hot summers and freezing nights, and the replacement is the right point to bring the insulation up to standard.
Liquid-applied roofing
Liquid systems suit balconies and walkways in Treharris because they form neatly at door thresholds, railings and drains, and some products are designed to take foot traffic. Converting a roof into a new terrace is a different matter, and usually needs planning permission first.
Flats, HMOs and block roofs
Roof works on a block in Treharris affect many households at once. We agree notices, scaffold positions, working hours and a named contact with the agent or freeholder before we start, so residents know what is happening, when it will happen and who to ask if they have a question.
All flat roof services in Treharris:
- Single-ply membrane roofing
- Flat roof repairs
- Warm roof insulation upgrades
- Commercial flat roofing
- Liquid-applied roofing
- Flats, HMOs and block roofs
- Torch-on felt roofing
- Extension and kitchen roofs
- GRP fibreglass roofing
- Balconies and roof terraces
- Green and sedum roofs
- Flat roof replacement
- Dormer roofs
- Garage roofs
- Flat roof surveys and leak tracing
- Emergency leak repairs
- EPDM rubber roofing
How much does a flat roof cost in Treharris?
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 |
|---|---|
| Emergency temporary weatherproofing visit | £170–£410 |
| Single garage (18 m²), GRP fibreglass | £1,650–£3,000 |
| Upstand or flashing repair | £230–£600 |
| Single garage (18 m²), EPDM rubber | £1,450–£2,600 |
| Extension (20 m²), felt, new deck + insulation | £2,500–£4,300 |
What flat roofs are typical in and around Treharris?
In a town like Treharris flat roofs are mostly on bungalows with flat-roofed side extensions and dormers and low-rise post-war blocks of flats. The climate is part of the brief. 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 Treharris?
Where approval is needed it goes to Merthyr Tydfil 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 Treharris do we cover?
Flat roofing in Treharris: questions
Do you cover Treharris?
Yes, including postcode districts CF46. Send your postcode with your enquiry and we'll arrange a survey.
Do flat roofs in Treharris need building control approval?
Usually. Welsh Government guidance is that most re-roofing needs building control approval, so check whenever more than a quarter of the roof is being replaced or repaired. In Treharris that's Merthyr Tydfil County Borough Council building control, or a registered building control approver. We tell you at the survey and handle it.
Do you also cover Gelligaer?
Yes. Gelligaer is about 2 miles from Treharris and we cover it too.
Is a free survey available in Treharris?
Yes, for new and replacement roofs. A standalone condition survey or leak investigation report is a paid service.