Reliable Roofing Services Across Belfast, Bangor & Newtownards
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Call Us NOW – Let’s Get It Done!
Welcome to Onslow Roofing & Building Services LTD
Trusted Belfast Roofers for Over 30 Years
Reliable, Fully Insured Roofing Solutions Backed by Local Expertise and Award-Winning Service
Roof Repairs & Maintenance
Fast, reliable repairs for leaks, storm damage, and wear & tear. We keep your roof safe and sound, year-round.
New Roof Installations
Upgrade your property with expertly installed slate, tile, or flat roofing systems built to last.
Flat & Corrugated Roofing
Ideal for garages, extensions, and outbuildings. Durable materials and expert installation.
Belfast’s Trusted Roofing Specialists for Over 30 Years
At Onslow Roofing & Building Services Ltd, we’ve built a solid reputation across Belfast and beyond by delivering high-quality roofing solutions backed by genuine experience and unbeatable service. Whether you’re dealing with a minor leak or need a complete roof replacement, our fully insured and highly skilled team is here to help – efficiently, professionally, and affordably.
As the #1 roofing contractor on 3 Best Rated, our workmanship is trusted by homeowners, landlords, and commercial clients alike. We’re also proud sponsors of the Olympia Leisure Centre & Clubroom Sport, reflecting our deep roots and commitment to the local community.
Roofing Services Belfast
We offer our roofing services to all areas of Belfast including:
Strandtown
Castlereagh
Newtownbreada
Dunmurry
Dundonald
Carryduff
North Belfast
South Belfast
East Belfast
West Belfast
Roofing Services Bangor
We offer our roofing services to all areas of Bangor including:
Holywood
Helen’s Bay
Crawfordsburn
Conlig
Six Roads Ends
Groomsport
Donaghadee
Ballyvester
Millisle
Roofing Services Newtownards
We offer our roofing services to all areas of Newtownards including:
Killarn
Dundonald
Comber
Ballygowan
Lisbane
Loughries
Carrowdore
Ballywalter
Greyabbey
Ready to Secure Your Roof? Let’s Get Started Today
30+ Years of Roofing Excellence
We’ve been protecting Belfast homes and businesses for over three decades – and we bring this expertise to every job.
Fully Insured & Public Liability Cover
Your peace of mind is important to us. We’re fully insured with comprehensive public liability coverage.
Award-Winning & Top-Rated
Don’t just take our word for it. We’re proud to be ranked the top roofing contractor on 3 Best Rated in Belfast.
Complete Roofing Services
From slate and tile repairs to flat roofs and chimney work, we handle it all. No job is too big or small.
Proud Supporters of Our Local Belfast Community
At Onslow Roofing, community isn't just where we work — it’s who we are. As a local business with over 30 years of service, giving back to Belfast is at the heart of everything we do.
We’re proud sponsors of Olympia Leisure Centre and Clubroom Sport, two organisations that uplift and inspire through sport, wellness, and local engagement. By investing in these vital community pillars, we help create safe, active spaces for families, youth, and future leaders.
Whether it's through sponsorship, volunteering, or offering discounted services to community groups, we believe in building more than just roofs — we build stronger neighbourhoods.
See Why Our Customers Trust Onslow Roofing
Our clients say it best! With decades of dependable service across Belfast, we’ve earned a strong reputation backed by verified ★★★★★ Google Reviews. From emergency repairs to full roof replacements, people trust Onslow Roofing for honest advice, skilled workmanship, and results that last.
✅ 5-Star Rated
✅ Real Reviews from Real Customers
✅ Trusted by Belfast for Over 30 Years