When an overlay is the right call
- The existing base is intact, firm and well compacted.
- There is no pattern of movement or cracking that keeps coming back.
- The falls still work and the surface still sits below the property's damp-proof course.
- There is enough height at the edges and thresholds for the new build-up.
- Drainage at the boundary is not made worse by the new level.
When it isn't
- Sunken or soft areas, or patch repairs that have failed more than once.
- Cracking that keeps reappearing in the same place.
- Levels that already run towards the house or garage.
- No real edge restraint holding the existing build-up.
- Ground that is soft, made up or contaminated.
Why we don't decide from a photograph
The visible finish does not establish the condition of every layer beneath it. We inspect the surface, edges, drainage and thresholds, and identify any further checks needed before recommending an overlay or reconstruction.
What it means for your price
Where an overlay is suitable it is the cheaper route, because excavation and new sub-base come out of the scope. If the assessment says otherwise, we tell you before you commit and price the reconstruction honestly — we won't quote an overlay we wouldn't stand behind.