Not every flat roof that leaks has to come off. The honest answer depends on how far the damage has spread and what is happening to the deck beneath.
Flat roofs in Arnos Vale are mostly the small ones attached to older houses: extensions at the back, porches, garage tops and bay roofs on the sloping streets. When one starts to leak, people assume the whole thing must go. Often it does not. The decision turns on how widespread the problem is and whether the structure under the covering is still sound.
When a repair makes sense
If the covering is mostly sound and the fault is local, a repair is the sensible route. That might be a split along a seam, a lifted edge, a failed joint around a pipe or a blister that has opened. The surrounding surface needs to be firm, dry and well attached so the patch has something to bond to. We would rather fix a small problem properly than sell you more than you need.
When replacement is the better answer
Replacement is the better choice when faults keep returning, when the surface is cracked, brittle or blistered across large areas, or when water has been getting in for long enough to soak the layers. Patching a tired covering often buys only a short respite. At that stage a new system laid properly gives a sound, watertight surface and lets us correct the problems underneath.
- Cracks and splits spread across the surface
- Large areas of blistering or lifting
- Repairs that keep failing in new places
- Soft, spongy feel underfoot from inside access
What lies underneath matters most
The deck is what the covering sits on, and it is the thing you cannot see. If water has been getting in, the boards beneath may be damp or rotten, and a new covering laid over them would fail early. We open up a small area where needed to check, and we cut out and replace bad timber before anything new goes down. Insulation and falls are looked at too.
Ponding, drainage and slope
Water sitting on a flat roof for long after rain tells us the falls are poor or an outlet is blocked. Standing water speeds up ageing and finds every weakness. On older extensions the original slope can be too shallow or have settled. A repair may be enough if the cause is a blocked outlet, but if the roof genuinely lacks fall, correcting it during a replacement is the lasting fix.
What we will tell you
After the inspection you get a plain account of what we found, with photographs, and a clear view on whether a repair is realistic. We name the covering options in general terms, such as single-ply rubber, fibreglass or felt systems, and explain what each suits. If a repair will not hold, we say so rather than take the work. Call us for a proper look.
Frequently Asked Questions
Can I tell from inside whether the deck is damaged?
Sometimes. A sagging ceiling, damp patches, a musty smell or a soft area above can point to wet timber. We cannot be sure until the roof is opened up, which is why we check the deck before recommending a covering.
Is a patch ever a good idea on an old flat roof?
Yes, when the rest of the surface is sound and the fault is clearly local. As a temporary measure it can also give breathing space while a replacement is planned, as long as you know it is not a permanent cure.
Does a replacement always mean new timber?
No. Many decks are dry and sound and can be re-covered after the old layers are stripped. We only replace boards that are damaged, and we show you any bad timber so you can see why it was changed.
Talk to our team about flat roofing in Arnos Vale
Every roof is different — the fastest way to get an accurate answer is a quick chat with our team.