Mastic asphalt is the tough, traditional way to waterproof a flat roof. It gets laid hot, setting into one continuous finish with no joints anywhere. It takes weather and foot traffic better than almost anything else, so it suits balconies, walkways, and busy commercial roofs. We install, repair, and recoat asphalt roofs across Dublin.
50+
years
Fully insured
Guild of Master Craftsmen
4.9 ★
rating
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Family firm since 1969, with asphalt laid across Dublin on homes, extensions, and commercial roofs. We know how the material behaves in our climate.
CSCS-carded operatives, an in-house safety officer, and full insurance coverage so the job is done properly and safely from the first day to the last.
Flat roofs fail first at the edges. We take care at the upstands, outlets, and gutter lines, the points that decide whether a roof stays dry.
Mastic asphalt is a blend of bitumen and fine stone, heated and laid hot in layers over the roof deck. As it cools, it sets into one tough, continuous, waterproof surface. There are no joints or laps anywhere, so there is nothing to lift, split, or let water through. That continuous finish is what makes it so reliable on flat and low-pitch roofs in a wet, windy climate like ours.
Asphalt is also hard enough to walk on every single day, which most flat roof coverings simply are not. That makes it the strong choice for balconies, walkways, terraces, dormers, and any busy flat roof that takes regular foot traffic. It suits homes and commercial buildings alike, from a small dormer roof to a full podium deck.
Most roof problems start small and quiet, then get expensive. If you have spotted any of these, it is worth getting them looked at before the next downpour.
We come out, get on the roof, and find exactly what is wrong.
You get a clear, itemised price. No call-out charge, no pressure.
Our own crew carries out the work, tidily and on the agreed date.
We show you what we did and stand over the work.
Asphalt ages slowly and shows it clearly, and most of what it shows can be repaired if caught in time.
Fine surface cracks spread like a dried riverbed as the surface ages. Caught early, a recoat seals them over.
Trapped air or moisture lifts small domes in the surface. Left alone, they burst and let water sit in.
The protective solar coating wears off in patches, and bare black asphalt then bakes and cracks faster in the sun.
Areas that give underfoot mean water has got below the asphalt. That one needs looking at straight away.
A few recent repairs around Dublin. Real jobs, real homes.
Every asphalt roof starts with a proper look at the deck, the falls, and the existing detailing so the finished surface drains the way it should. We agree on a fixed price in writing, prepare the deck.
Then lay the asphalt hot to the correct thickness, building up the upstands and dressing it neatly into outlets and gutters. When it is done, you get the paperwork and a roof that needs very little looking after.
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Posted on Google Amelia TaylorTrustindex verifies that the original source of the review is Google. Very pleased with the metal roof that HP Roofing just installed!Posted on Google Saeeda GhiasTrustindex verifies that the original source of the review is Google. Very professional and timely servicePosted on Google Iman JavaidTrustindex verifies that the original source of the review is Google. Excellent work done by HP Roofing. Professional roofing service delivered on time.
No call-out charge, no obligation. We’ll tell you honestly whether it needs repairing or replacing.
Yes. Asphalt sets into one continuous waterproof surface with no joints to fail, which suits our wet, windy weather. It is also hard-wearing and takes foot traffic well, so it is a common choice for balconies, walkways, and busy commercial flat roofs.
Mastic asphalt is a mix of bitumen and fine aggregate. It is heated and laid hot in layers over the deck, and then it cools and sets hard into a single continuous waterproof finish. Laying it well is skilled work, which is why it pays to use an experienced asphalter.
Often it can be repaired or recoated rather than fully replaced. We look at the roof first and only recommend a new finish when a repair is no longer the sensible option. We will tell you honestly which one your roof needs.
Anywhere you want a tough, long-lasting flat roof that can take some traffic, such as balconies, walkways, dormers, garages, extensions, and commercial flat roofs. If your roof is large and modern, we will also talk you through single-ply options so you can compare.
Book a free, no-obligation inspection and we will tell you honestly what your roof needs.
Request A Quote
Get the contact details you need to connect with our team.