Lisburn at a glance
- Postcode districts
- BT17, BT26, BT27, BT28
- Population
- about 77,506 (GeoNames)
- Council area
- Lisburn and Castlereagh City Council
- Building approval
- Lisburn and Castlereagh City Council building control
- Nearest main town
- Belfast, about 7 miles
- Guide price region
- Northern Ireland (−12% on West Midlands rates)
What flat roof work do we do in Lisburn?
Flat roof replacement
Exposure matters too. Wind lifts tired edges, and repeated wetting and drying works at old joints, so roofs in exposed spots can wear faster than the same roof somewhere sheltered. Wherever your property is in Lisburn, a survey tells you whether the roof has years left or needs replacing now.
GRP fibreglass roofing
Some Lisburn homeowners pick GRP for appearance alone. The topcoat comes in several colours, the trims are moulded to match, and the finished roof looks tidy from upstairs windows. With good laying conditions and a sound deck, a GRP roof typically lasts 20 years or more.
Balconies and roof terraces
A roof terrace in Lisburn may be re-waterproofed when the owners want to change the finish, swapping old tiles for decking or porcelain on pedestals. Lifting the surface exposes the membrane, and replacing it then avoids having to lift the new finish again later.
All flat roof services in Lisburn:
- Garage roofs
- Balconies and roof terraces
- Flats, HMOs and block roofs
- Flat roof repairs
- GRP fibreglass roofing
- Extension and kitchen roofs
- Commercial flat roofing
- Warm roof insulation upgrades
- Torch-on felt roofing
- Flat roof replacement
- Liquid-applied roofing
- Dormer roofs
- Green and sedum roofs
- Single-ply membrane roofing
- Flat roof surveys and leak tracing
- EPDM rubber roofing
- Emergency leak repairs
How much does a flat roof cost in Lisburn?
Guide prices at Northern Ireland 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 |
|---|---|
| Commercial roof (100 m²), single-ply + insulation | £11,650–£19,150 |
| Upstand or flashing repair | £220–£570 |
| Extension (20 m²), felt, new deck + insulation | £2,400–£4,100 |
| Extension (20 m²), EPDM, insulation + 1 rooflight upstand | £2,650–£4,600 |
| Balcony (12 m²), liquid-applied, scaffold | £1,650–£2,850 |
What flat roofs are typical in and around Lisburn?
In a large town like Lisburn flat roofs are mostly on lock-up garage blocks on estates and newer estates where the first extension roofs are now being replaced. Weather matters on a flat roof. Northern Ireland averages roughly 1,150 mm of rain a year, spread over many wet days, so a roof that sheds water quickly to clear outlets lasts far longer than one that holds puddles. Approximate 1991–2020 regional averages based on Met Office data.
Who approves flat roof work in Lisburn?
Where approval is needed it goes to Lisburn and Castlereagh City Council building control. In Northern Ireland, renovating or replacing a roof over a heated room usually means meeting Technical Booklet F1, and building control should be contacted before work starts. How the rules work.
Which places near Lisburn do we cover?
Flat roofing in Lisburn: questions
Do you cover Lisburn?
Yes, including postcode districts BT17, BT26, BT27, BT28. Send your postcode with your enquiry and we'll arrange a survey.
How much is a new flat roof in Lisburn?
A typical 18 m² EPDM garage roof is £1,400–£2,450 and a 20 m² insulated EPDM extension roof is £2,450–£4,300, at Northern Ireland guide rates including VAT.
Do flat roofs in Lisburn need building control approval?
Often, when a roof over a heated room is renovated or replaced, or the structure changes. In Lisburn that's Lisburn and Castlereagh City Council building control, who should be contacted before work starts. We tell you at the survey and prepare the details it asks for.
Do you also cover Carryduff?
Yes. Carryduff is about 6 miles from Lisburn and we cover it too.