Our headline system. A single, hand-laid layer of fibreglass and resin over a solid 18mm OSB3 deck, with no seams to split or lift. Ideal for extensions, garages, dormers, bays and any domestic flat roof.
GRP fibreglass works across almost any domestic flat roof. These are the jobs we are called out to most often.
Both are fully supported. The right choice comes down to how the space below is used and how much insulation you need.
Our most popular system. Insulation sits between or below the joists. Cost-effective and ideal for most domestic roofs.
Insulation sits above the deck for greater thermal performance and no cold bridging. Worth it where the room below is heated living space.
Every Smartseal roof comes in your choice of 92 BS4800 colours, with a smooth or non-slip finish to suit the job.
See the full palette & finishesA properly installed GRP fibreglass roof lasts well beyond its 25-year guarantee, commonly 30 years or more. There are no seams or laps to fail, so it never needs the regular resealing that felt and EPDM do.
It depends on the size, access and whether the deck needs replacing, so we give a fixed price after a free survey. Over its lifetime GRP is competitive with a quality felt or rubber roof because it lasts far longer with no resealing.
For durability, yes. GRP is one seamless bonded skin with nothing to lift, split or peel, while felt and rubber rely on joints and adhesives that degrade over time. It is also walkable and fire-resistant.
Yes, it is solid and walkable for maintenance. For roofs used regularly, such as balconies or terraces, we add a non-slip aggregate finish for grip underfoot.
Most domestic flat roofs are stripped, decked and laminated in two to four dry days. We give you a realistic timeline before we start.
Accredited & approved
A director will visit, measure up and talk you through colours and finishes. No pressure, no follow-up sales calls.