When choosing a roofing material, it’s easy to focus on price or style. But the question that really matters? How long is it going to last?
Lifespan varies quite a bit depending on the climate, how it’s installed, and whether it’s maintained properly. Still, some materials tend to go the distance far better than others — and that’s what this guide looks at.
We’re comparing five popular roofing options: clay tiles, GRP fibreglass, PVC membranes, bitumen, and liquid systems. Each one has its strengths, but they don’t all last the same amount of time. Some could keep going strong for decades.
So, which roofing material lasts the longest? This article breaks it down to help you choose the one that offers the best long-term value for your home or commercial property.
Clay Tiles
Clay tiles can last anywhere from 50 to 100 years, making them one of the longest-lasting options out there. They’re tough against the weather and don’t need much upkeep, which is ideal if you’d rather not deal with frequent repairs.
They’ve got that timeless look often seen on traditional or period-style buildings with pitched roofs. But they’re not the lightest — the roof structure needs to be strong enough to hold them. They can also crack if stepped on and cost more upfront than some other materials.
That said, their longevity and appearance often justify the price for many property owners. If you’re looking for something that blends long-term performance with a classic finish, clay tiles could be a very solid pick.
GRP Fibreglass Roofing
GRP fibreglass roofs don’t quite hit the century mark like clay tiles, but they can still last up to 20 years or more when done properly. That’s not bad at all, especially for something that looks this neat and seamless.
GRP stands for Glass Reinforced Plastic, and it’s a bit of a favourite for flat roofs. Lightweight, watertight, and UV-resistant, it handles the elements without much drama. One continuous layer means fewer joints, which means fewer places for leaks to sneak in.
Now, like anything, the lifespan of a GRP roof depends a lot on how it’s installed and maintained. A poor job at the start or letting debris build up over time can shave years off. Heavy foot traffic doesn’t help either — it’s strong but not indestructible.
It tends to work well on garages, balconies, commercial buildings, or anywhere flat where durability matters and style’s still a factor.
PVC Roofing Membrane
PVC membranes might not sound glamorous, but they’re surprisingly reliable. With proper installation and a bit of care, they tend to last around 20 to 40 years — sometimes even longer if everything lines up just right.
They’re flexible, which makes them a good match for roofs that expand and contract with the weather. Plus, they’re resistant to chemicals and UV light. That reflective surface? It helps with energy efficiency too, especially on large buildings.
But no roofing system is bulletproof. PVC membranes can be punctured if necessary care isn’t taken. And again, the quality of the installation plays a big part. Done right, they’re solid. Done wrong, and problems start earlier than you’d like.
They’re a bit of a go-to for commercial flat roofs — or green roofs — where durability, clean lines, and performance all matter.
Visually, PVC roofs, if installed well, can look good and can offer value for money.
Bitumen
Bitumen roofing — whether it’s the traditional felt style or more modern modified bitumen — tends to last somewhere between 10 and 30 years. That range depends a lot on how it’s installed, the local climate, and how well it’s looked after.
It’s often picked for its affordability and reliability. Water doesn’t bother it much, and if a patch ever needs fixing, it’s usually a quick job. That makes it popular on both residential and commercial flat or low-slope roofs.
Still, bitumen isn’t the most resilient roofing material over time. Heat and UV rays can take their toll, causing the surface to dry out or crack. Regular inspections and the occasional re-coating can help slow that down a bit.
So, while it might not be the longest-lasting roofing material, it’s often seen as a solid, cost-effective option when you need something that works without breaking the bank.
Liquid Roofing Systems
Liquid roofing systems are often the quiet workhorses of the flat roofing world. With the right prep and a steady hand during application, they can last anywhere from 15 to 40 years.
They go on as a liquid and cure into a fully waterproof, seamless layer. No joins means fewer weak spots — and fewer headaches down the line. Quick to install and easy to recoat when needed, they’re a pretty practical option.
That said, their staying power depends a lot on surface prep and application. Skimping on either can lead to problems. The thickness of the coating, the type of liquid used, and what lies underneath all play a part in how long they’ll hold up.
These systems are often a great shout for awkwardly shaped roofs, or as a way to refresh an existing one without a full strip-down. They tend to be all about convenience and coverage.
So, which roofing material lasts the longest? Clay tiles clearly top the chart, often clocking up 50 to 100 years. PVC membranes and liquid systems come next with dependable performance, followed by GRP fibreglass and bitumen, which still offer good service lives in the right settings.
But longevity isn’t the only thing worth thinking about. What suits one property might not suit another — weight, cost, roof shape, and location all come into play. And no matter which option you pick, the way it’s installed and how it’s looked after makes a huge difference.
If you’re weighing up your choices and want something that works long-term, it’s usually best to get advice based on your specific roof. Speaking with a specialist like AAC Flat Roofing can help you make a decision that saves money and stress further down the line. Contact us today.
