Holywood at a glance
- Postcode districts
- BT18
- Population
- about 13,109 (GeoNames)
- Council area
- Ards and North Down Borough Council
- Building approval
- Ards and North Down Borough Council building control
- Nearest main town
- Belfast, about 5 miles
- Guide price region
- Northern Ireland (−12% on West Midlands rates)
What does a dormer roof in Holywood need?
High, exposed dormers in Holywood take the full force of the wind and rain. Edge trims loosen, flashings lift and the felt at the drip edge cracks. Once the faults spread around the perimeter, a new roof with fresh trims usually lasts far longer than another round of repairs.
In and around Holywood, flat roofs are typically found on 1930s semis with flat-roofed garages and kitchen extensions, and on newer estates where the first extension roofs are now being replaced. 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.
How much does a new dormer roof cost in Holywood?
At Northern Ireland guide rates, an 8 m² GRP dormer roof including scaffold comes to £1,250–£2,350 including VAT. The fixed price comes after a free survey for new and replacement roofs.
| Job | Guide price inc VAT |
|---|---|
| Dormer (8 m²), GRP, scaffold | £1,250–£2,350 |
| Single garage (18 m²), EPDM rubber | £1,400–£2,450 |
| Extension (20 m²), GRP, new deck + insulation | £2,650–£4,750 |
Is GRP or EPDM better on a dormer roof?
GRP fibreglass is often the first choice on a dormer, because it is laid as a liquid resin over a mat and forms neat, rigid edges, corners and drip details on a small roof. It cures to a hard surface that copes with occasional foot traffic during window cleaning or maintenance.
EPDM rubber works well on a plain rectangular dormer and can usually be laid as one sheet, with no field joins. Unlike GRP, it does not depend on resin curing conditions on the day. Torch-on felt can be used, but working a torch close to timber cladding, fascias and tiles needs extra care, so a cold-applied system is often chosen instead.
We recommend the system after surveying the dormer, its edges and how it meets the main roof.
What's included?
- Free survey of the dormer roof, cheeks and main roof junction
- New membrane, drip trims and back-edge abutment under the tiles
- Scaffold with edge protection, priced in the quote
- Warm-roof insulation and a vapour control layer
Building control in Northern Ireland
In Northern Ireland, Technical Booklet F1 sets roof insulation at 0.18 W/m²K when a roof over a heated room is renovated or newly built, where that's feasible. The district council's building control should be contacted before work starts, and we prepare the details it asks for. More on the rules.
Which nearby areas do we also cover?
Dormer roofs in Holywood: questions
Do you cover Holywood?
Yes. Holywood is part of our County Down coverage, including postcode districts BT18. Surveys and roofs are carried out by vetted roofing teams working under S&K Property Investments and Improvement Ltd.
Who checks building regulations for a flat roof in Holywood?
Where the work needs approval it goes to Ards and North Down Borough Council building control. We tell you at the survey whether your job needs it and deal with the paperwork as part of the quote.
How much does a new dormer roof cost in Holywood?
£1,250–£2,350 for an 8 m² GRP dormer roof including scaffold, at Northern Ireland guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
Will insulating my dormer roof make it higher?
Yes, by the insulation thickness. We plan the build-up so the new roof still sits correctly under the main roof tiles at the back edge.
Does the room below need emptying?
No, but moving furniture away from the window and covering the floor is sensible. The room stays usable throughout.