Roofing
EPDM rubber, GRP and felt, installed new or repaired.
Flat roofs got their bad reputation from felt that was never going to last. The systems we fit now are a different thing entirely, laid in one piece with no joins to open up, and they will outlast the extension underneath them. We install and repair all of them, so whether you need a whole new flat roof or the one you have put right, it is the same team either way.
A single sheet of rubber membrane cut to your roof and bonded down, so on most domestic roofs there is not a joint anywhere in the field of it. It stays flexible in the cold instead of going brittle, it copes with the building moving underneath it, and it is the system we fit most often on extensions, garages and dormers.
Laid wet and cured into a single sheet with no joins or welds anywhere in it. Hard wearing, walkable, and a good choice for balconies and dormers as well as extensions.
A tough sheet membrane, hot air welded at the laps, that copes well with larger areas and complex shapes. It goes down quickly and it does not need heat on the deck.
Modern high performance felt in layers, a long way from the single layer that used to blister and split. Still the sensible answer on some garages and outbuildings.
Insulation above the deck rather than below it keeps the structure warm and stops condensation forming inside the roof. It is what current building regulations expect on a habitable room.
Not every flat roof needs replacing. Splits, blisters, failed upstands and perished flashings can all be repaired properly, and on a roof with life left in it that is the sensible money. What we will not do is paint over a roof that has water sitting under the membrane, because that hides the problem for a season and costs you the ceiling underneath. We will tell you honestly which one you have.
We install to the manufacturer's specification, which is what keeps their material guarantee valid alongside our workmanship one. Where a roof needs to meet building regulations for insulation, we build it to do that and tell you what it involves before you commit.
Photographs from our own jobs. Click any of them to enlarge.
A properly installed GRP or single ply roof on a sound deck should give you decades rather than years. What shortens it is a soft deck, poor falls or bad edge detail, which is why we deal with all three rather than just laying a new surface.
Neither, in the abstract. Rubber flexes with the building and handles cold better, so it suits a timber deck that will move a little. Fibreglass is harder and takes foot traffic better, so it suits a balcony or anywhere you will actually walk. We look at the roof and tell you which one we would put on it.
GRP is walkable for maintenance access. If you want a balcony or a terrace you will actually use, tell us at survey and we will spec it for foot traffic properly.
Because it has no fall, or the deck has sagged. Water sitting on a roof finds every weakness eventually. Correcting the fall is part of how we rebuild it, not an extra.
If the space underneath is a habitable room, current building regulations expect the insulation performance a warm roof gives you. Over a garage or a store it is usually not required. We will tell you which applies.
Straight answers to the questions that usually come before a flat roofing job.
Water sitting on a flat roof days after rain means the roof has no fall, or the deck has sagged and made a dip. On EPDM rubber or GRP the water itself does little harm; on old felt it finds every lap and blister and shortens the roof's life. If the pool is over a joint, a lap or a seam, it needs sorting before winter.
Read the full answer →Checkatrade's 2026 guide puts a standard flat roof replacement between £2,800 and £7,500, or roughly £75 per square metre, with felt averaging £65, EPDM rubber £90 and GRP fibreglass £107.50 per square metre plus VAT. The size of the roof and the covering set the base price; stripping the old roof, replacing rotten decking, insulation and scaffolding are on top. We quote after seeing the roof, because the deck underneath is what moves the price.
Read the full answer →Tell us about your project and we'll be in touch.
Materials and systems we work with
