Tarmac driveway repairs
In short
Cutting out failed tarmac back to sound material, dealing with whatever caused it underneath, and reinstating in proper compacted layers. Which faults are worth patching and which mean the drive has come to the end gets answered honestly before any work is priced.
Also called: Repair tarmac drive · Tarmac patching · Tarmac cracking repair · Crumbling tarmac
Signs you need this
- Loose chippings coming away from the surface underfoot
- A network of interconnected cracks in one area
- Potholes, or previous patches that have sunk or lifted
- A soft, shiny, crumbling patch where a car parks — usually oil
- Ragged, crumbling edges around the perimeter of the drive
- Water standing in the same hollow after every shower
Tarmac fails in four recognisable ways and each has a different answer. It ravels — the surface loses its fine material and turns to loose chippings, which is age and UV and is a resurfacing job, not a repair. It cracks in a map or crocodile pattern, which means the base has failed under load and that section needs rebuilding. It potholes, which means water got into the base at a specific point. Or its edges crumble away, which means there was never anything for the perimeter to compact against.
Reading which one you have saves money in both directions. A drive that has ravelled but is otherwise solid and flat needs a wearing course overlay, not a rebuild — a genuinely economical job that will take fifteen years off how it looks. A drive with map cracking across most of its area cannot be fixed from the top at all, and anybody offering to overlay it is selling you a surface that will crack through in the same pattern within a couple of years.
The repair itself follows the same discipline every time. The failed area is saw-cut or planed back to sound material with vertical edges, not feathered ones — a feathered edge is thin at exactly the point where it takes the most abuse. Whatever is soft or contaminated below comes out. Clean stone goes back and is compacted in layers. A tack coat bonds the new material to the cut faces. Then the tarmac goes in, hot where practical, in a binder and wearing course if the depth allows, and is rolled properly.
Sealing the perimeter of the patch is the small step that decides whether it lasts. Water gets in at the joint between old and new before it gets in anywhere else, so the cut edges are tacked before laying and the finished joint is sealed. It is a five minute job that adds years, and it is the first thing skipped by anyone working quickly.
Timing genuinely matters with tarmac, more than with most repairs. Hot material has to be laid and rolled while it is hot, which means cold, wet conditions work against you — and a patch laid into standing water will not bond to the cut faces at all. Spring through early autumn is the sensible window. A pothole that is not a trip hazard can wait for it, and it will last longer for having waited.
Two local factors are worth naming. Frost is what turns tarmac cracks into potholes, and it is more frequent with height — the Met Office records 51.5 air-frost days a year at Buxton against 40.0 at low-lying Woodford, with temperature falling roughly half a degree per hundred metres. And spilled fuel and oil dissolve bitumen, so the patch of soft, shiny, crumbling tarmac under where a car has always parked is a chemical problem rather than a structural one, and it needs cutting out rather than covering over.
What the job covers
- The failure type identified — ravelling, cracking, potholing or edge loss
- The failed area saw-cut or planed back with vertical edges
- Soft, wet or oil-contaminated base excavated rather than covered
- Clean stone reinstated and compacted in layers
- Tack coat applied to the cut faces before laying
- Tarmac laid and rolled hot where practical, in proper thicknesses
- The perimeter joint sealed so water cannot get straight back in
- An honest answer where the drive needs resurfacing rather than patching
What it costs
We don't publish a price for this yet, because a number pulled out of the air is worse than no number at all — your contractor has to honour it. On driveways it would also be close to meaningless: the groundworks are usually the biggest single factor, and how deep the dig has to go varies enormously house to house. You'll get a firm price for your actual job when they ring you back, before any work starts. The quote itself is free and there's no obligation either way.
Common questions
Will the patch match the rest of the drive?
It will be visibly darker at first and it will fade towards the surrounding colour over a year or two, but it will always be discernible if you look for it. That is the honest position with tarmac. Where a drive has several patches, overlaying the whole surface with a new wearing course gives a uniform finish for surprisingly little more.
My drive is going to loose chippings all over. Is that a repair?
That is ravelling — the binder has aged and UV has broken it down, so the surface is losing its fines. It is not a structural failure and it does not need a rebuild. Provided the drive is still flat and solid underfoot, a new wearing course laid over the prepared surface deals with it properly and economically.
Why is the tarmac soft where I park?
Almost certainly fuel or oil. Petrol, diesel and engine oil dissolve the bitumen that holds tarmac together, so the affected area softens, goes shiny and eventually crumbles. It cannot be sealed over — the contaminated material has to be cut out and replaced. Fixing the drip is worth doing at the same time, or it will happen again.
Can tarmac be repaired in winter?
It can be made safe in winter, but a lasting repair wants dry conditions and reasonable temperatures. Hot material has to be rolled while hot, and nothing bonds to a wet cut face. Where something is a genuine hazard it gets dealt with; where it is not, it is better work and better value done in spring.
Need this doing in Macclesfield?
Tell us the job and it goes straight to our local contractor — one call back, usually the same day. Free quote, no obligation.