Kent · England
Structural surveys and crack monitoring in Kent
Structural surveys and crack monitoring in Kent starts with the ground. Shrinkable clay is widespread in Kent, and the buildings here are mostly Victorian terraces in the Medway towns, so the repair has to suit both.
Guide price from£560per property inc VAT
- Area
- Kent
- Pricing region
- South East
- Ground
- Shrinkable clay widespread
- Towns listed
- 22
Why does the ground in Kent matter for structural surveys and crack monitoring?
North Kent sits on London Clay, central Kent on Gault and Weald Clays and the Downs on chalk, so shrinkable clay is widespread. East Kent around Deal and Dover had a small deep coalfield, worked until the late 1980s.
Parts of Kent lie on a former coalfield, so a coal mining search is worth checking if movement has no obvious cause. Across Kent, most homes are Victorian terraces in the Medway towns, weatherboarded and Wealden houses, 1930s semis and seaside bungalows.
Which repair method suits a home in Kent?
Engineer’s structural inspection and report
A chartered structural engineer visits, records the cracks, checks the walls, floors, drains and nearby trees, and writes a report on the likely cause and next steps. It may recommend monitoring, investigations such as trial pits, or a repair specification.
Best for: A first expert opinion on any significant cracking
Level monitoring
Survey points are fixed around the building and their heights measured against a stable datum on each visit. This shows whether one part of the house is dropping or rising compared with the rest, which crack widths alone cannot reveal.
Best for: Suspected subsidence or heave across a whole house
Tell-tales and crack-width monitoring
Gauges are fixed across key cracks and read at set intervals, or reference studs are measured with callipers to a fraction of a millimetre. The readings show whether each crack is widening, closing or stable, and whether any change follows the seasons.
Best for: Tracking individual cracks over the seasons
What happens when we carry out structural surveys and crack monitoring in Kent?
Free initial assessment
Send photos of the cracks with something for scale and tell us when they appeared. We give a free view on whether an engineer’s inspection is worthwhile, and whether your insurer should be told first.
Install monitoring points
Tell-tales, measuring studs or level points are fixed at the locations the engineer chooses. A base reading is taken on the first visit, so every later reading can be compared against it.
Repair or close
If the readings show the house is stable, the engineer specifies the repair and we confirm a fixed price in writing. If movement continues, the cause is investigated further before a foundation repair is designed.
Signs you may need structural surveys and crack monitoring
- Cracks that seem wider after a hot, dry summer
- An insurer or loss adjuster asking for monitoring
- Cracks reopening after being filled and decorated
- Doors and windows sticking at some times of year only
How much will structural surveys and crack monitoring cost in Kent?
These are guide prices for Kent, using South East rates and including VAT. Your written quote follows photos or a survey, and is fixed once the repair is specified.
| Item | Guide price | Per |
|---|---|---|
| Structural engineer's inspection and report | £560 – £2,250 | per property |
| Crack monitoring: installation and three seasonal readings | £1,600 – £2,700 | per programme |
| Extra monitoring visit | £470 | per visit |
Do you need approval for structural surveys and crack monitoring in England?
Like-for-like repairs such as crack stitching and repointing do not usually need building control approval in England, but anything that changes or strengthens the structure, such as underpinning or rebuilding a wall, does. If the work touches a party wall, the Party Wall etc. Act 1996 may apply.
Find structural surveys and crack monitoring in your Kent town
- Maidstone
- Gillingham
- Tunbridge Wells
- Folkestone
- Margate
- Ashford
- Canterbury
- Sittingbourne
- Gravesend
- Dartford
- Ramsgate
- Dover
- Tonbridge
- Strood
- Whitstable
- Deal
- Sevenoaks
- Herne Bay
- Faversham
- Swanley
- Longfield
- Swanscombe
Structural surveys and crack monitoring in Kent: questions and answers
Why do houses in Kent crack?
North Kent sits on London Clay, central Kent on Gault and Weald Clays and the Downs on chalk, so shrinkable clay is widespread. East Kent around Deal and Dover had a small deep coalfield, worked until the late 1980s. Parts of Kent lie on a former coalfield, so a coal mining search is worth checking if movement has no obvious cause. Only an investigation on site can say why a particular building has moved.
How much will structural surveys and crack monitoring cost in Kent?
On South East rates, structural surveys and crack monitoring starts from about £560 per property, including VAT. The written price depends on the extent of the damage, access and whether an engineer or building control is needed.
What happens after the monitoring ends?
If the readings show the building is stable, the engineer specifies a repair, usually crack stitching and making good. If movement continues, further investigation and a foundation repair design follow. Either way, we confirm a fixed price in writing once the repair is specified.
What do BRE crack categories mean?
BRE Digest 251 groups damage by typical crack width. Category 0 is under 0.1 mm, 1 up to 1 mm, 2 up to 5 mm, 3 from 5 to 15 mm or several of about 3 mm, 4 from 15 to 25 mm, and 5 usually over 25 mm. It is a guide to severity, not a diagnosis of cause.
How long does crack monitoring take?
Monitoring normally runs for 6 to 12 months, because readings need to cover both the dry and wet seasons on clay soils. Shorter periods can be enough where the cause is clearly non-seasonal, such as a drain leak that has been repaired. The engineer decides when there is enough evidence.