Tarmacing & Surface Reinstatement
A tarmac surface that weeds through within two years is almost always a build-up problem rather than a tarmac problem — an inadequate sub-base or missing membrane lets roots and seed reach the surface from below. We lay every job to a build-up specification designed to stop that happening.
New Driveways & Car Parks
Full construction from excavation and sub-base through to a finished tarmac or block-paved surface.
Post-Excavation Reinstatement
Surfaces rebuilt correctly after knotweed excavation, utility works or drainage installation.
Sub-Base Engineering
Sub-base depth and compaction specified to the site's ground conditions and expected loading.
Weed-Proof Membrane Layer
A root barrier membrane installed beneath the sub-base on sites with a known invasive species history.
Repairs & Resurfacing
Pothole repair, edge reinstatement and full resurfacing of tired or failing existing tarmac.
Guaranteed Workmanship
All surfacing work covered by a 10-year insurance-backed guarantee against defective installation.
How the works run
- 1Site surveyWe assess ground conditions, existing surface condition and any invasive species history.
- 2Build-up specificationSub-base depth, membrane use and surface course are specified to suit the site and expected use.
- 3Excavation & sub-baseThe area is excavated, membrane laid where specified, and sub-base compacted in layers.
- 4SurfacingTarmac or block paving is laid, compacted and finished to falls that shed surface water correctly.
- 5Sign-off & guaranteeThe completed surface is inspected and a 10-year insurance-backed guarantee certificate issued.
Why so much tarmac fails within a few years
The single most common cause of premature tarmac failure is an inadequate sub-base — either too shallow, poorly compacted, or laid directly over ground containing live root systems from bindweed, knotweed or tree roots. Weeds and roots that are simply covered over rather than removed or barriered will find their way through joints and shrinkage cracks as the surface ages, which is why we treat sub-base preparation as the part of the job that actually determines how long the surface lasts.
Reinstatement after excavation needs its own specification
Ground that has been dug out for a knotweed excavation, drainage run or utility trench does not behave like undisturbed ground when it is filled and resurfaced — it settles unevenly and often still carries residual root fragments near the excavation edges. We specify a heavier sub-base and, where the excavation was for an invasive species, a root barrier membrane across the reinstated area, so the new surface does not inherit the same problem the excavation was meant to solve.
Compliance & accreditation
For how we identify species, price surveys and stand behind our work, see our approach FAQ.
Get a tarmacing quote
Send your site details and we will survey and return a build-up specification and price.