Newtownabbey at a glance
- Postcode districts
- BT36, BT37
- Population
- about 63,860 (GeoNames)
- Council area
- Antrim and Newtownabbey Borough Council
- Building approval
- Antrim and Newtownabbey Borough Council building control
- Nearest main town
- Belfast, about 4 miles
- Guide price region
- Northern Ireland (−12% on West Midlands rates)
What makes a good extension roof in Newtownabbey?
Condensation drives some replacements in Newtownabbey. Older extension roofs were often built cold, with insulation between the joists and no reliable vapour control. Warm air from the kitchen reaches the cold deck, moisture builds up and the timber suffers. A warm roof deals with the cause, not just the stain.
In and around Newtownabbey, flat roofs are typically found on terraced streets with flat-roofed rear kitchens and bathrooms, and on lock-up garage blocks on estates. 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 extension roof cost in Newtownabbey?
For Newtownabbey we use Northern Ireland rates: £2,450–£4,300 is the guide for a 20 m² extension roof in EPDM with a new deck and insulation, VAT included. The fixed price comes after a free survey for new and replacement roofs.
| Job | Guide price inc VAT |
|---|---|
| Extension (20 m²), EPDM, new deck + insulation | £2,450–£4,300 |
| Extension (20 m²), GRP, new deck + insulation | £2,650–£4,750 |
| Extension (20 m²), EPDM, insulation + 1 rooflight upstand | £2,650–£4,600 |
| Single garage (18 m²), EPDM rubber | £1,400–£2,450 |
Which flat roof system suits a kitchen extension?
On a plain rectangular extension, EPDM rubber is a strong, quiet choice that can often be laid in one sheet. It handles the slight movement between an extension and the house well.
Where the roof has a lantern, several rooflights or an internal corner, GRP fibreglass forms neat, rigid details around each one. Torch-on felt is a proven layered system and keeps costs down, though near timber cladding or at fragile junctions we may prefer a cold-applied method. If the extension is overlooked from upstairs windows, a sedum green roof is worth considering, provided the structure can take the extra load.
Whatever the membrane, the insulation sits above the deck as a warm roof. Our warm vs cold roof guide explains why.
What's included?
- Falls set away from the house wall
- Staged strip-out so the room stays weathertight
- Building control handled where needed, and a written workmanship guarantee
- New deck, vapour control layer and warm-roof insulation
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?
- Belfast · 4 mi
- Carrickfergus · 6 mi
- Dundonald · 6 mi
- Ballyclare · 7 mi
- Carryduff · 10 mi
- Newtownards · 10 mi
Extension and kitchen roofs in Newtownabbey: questions
Do you cover Newtownabbey?
Yes. Newtownabbey is part of our County Antrim coverage, including postcode districts BT36, BT37. 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 Newtownabbey?
Where the work needs approval it goes to Antrim and Newtownabbey 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 extension roof cost in Newtownabbey?
£2,450–£4,300 for a 20 m² extension roof in EPDM with a new deck and insulation, at Northern Ireland guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
Can you keep my existing roof lantern?
Often, if the lantern itself is sound. We lift it, rebuild the kerb, dress the new membrane up the upstand and refit the lantern.
Is EPDM or GRP better for a kitchen extension?
Neither is better in every case. EPDM suits simple rectangular roofs with few details, while GRP is often chosen where there are rooflights, corners or occasional foot traffic.