Structural crack repairs in Sevenoaks

Postcodes: TN13
Population: about 30,000
Area: Kent
Pricing region: South East

Is Kent prone to ground movement?

Sevenoaks is in Kent and takes in postcode districts TN13. About 30,000 people live there. We also take enquiries from nearby Tonbridge (6 miles), Swanley (9 miles) and Bromley (10 miles).

Much of Kent sits on clay that shrinks in dry summers and swells in wet winters. Parts of Kent lie on a former coalfield, so a coal mining search is worth checking if movement has no obvious cause. Housing stock in Kent: Victorian terraces in the Medway towns, weatherboarded and Wealden houses, 1930s semis and seaside bungalows.

What to expect when we carry out structural crack repairs

Survey and record
On site we measure the width along the crack, note its pattern and check nearby drains, trees and openings. If the cause is unclear, gauges can be fixed across it and read over several months.
Deal with the cause
Leaking drains, failed ties, a sagging lintel or ground movement are put right first, sometimes through an insurance claim. Repairing a crack before its cause is fixed usually means paying for the same job twice.
Written quote
You receive a no-obligation written quote listing each crack, the repair method chosen for it and the making good inside and out. Once the scope is settled, that becomes a fixed price in writing.

Is it time for structural crack repairs? Common signs

A crack noticeably wider at the top than the bottom, or the reverse
Daylight or a draught coming through a crack in an outside wall
Cracks that reappear in the same place after filling and painting

What should you budget for structural crack repairs in Sevenoaks?

For Sevenoaks we use South East rates. Treat the table as a budget guide, inc VAT; the price you pay is the one on your written quote.

Guide prices inc VAT on South East rates. Items marked est. are our estimates.
Item	Guide price	Per
Crack stitching with helical bars	£90 – £200	per metre of crack
Single crack, outside only (up to about 2 m)est.	£450 – £1,000	per crack
Internal making good and redecoration of the crack lineest.	£170 – £560	per room

Repair options we may recommend

Filling and repointing

For hairline and narrow cracks that have stopped moving, the crack line is raked out and repointed in mortar matched to the original for strength, colour and texture. Inside, plaster cracks are cut out, filled with a flexible filler and redecorated.

Best for: Cracks up to about 5 mm that are no longer moving

Crack stitching with helical bars

Stainless steel helical bars are grouted into slots cut along the bed joints, bridging the crack so the masonry works as one piece again. It is the standard repair for wider stepped and vertical cracks once whatever caused them has stopped.

Best for: Stable cracks wider than about 5 mm, or ones that keep reopening

Rules for structural crack repairs 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.

Your structural crack repairs questions

How much will structural crack repairs cost in Sevenoaks?

Guide prices for structural crack repairs in Sevenoaks start from about £90 per metre of crack, including VAT, on South East rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.

Do you cover Sevenoaks?

We do. Sevenoaks and the surrounding area are covered, including nearby Tonbridge and Swanley. A free initial assessment from your photos is the first step.

Is the ground in Kent prone to subsidence?

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. Only an investigation can say why a particular building has moved.

Can I just fill a crack and paint over it?

You can fill a fine crack that is not moving, and for many hairline cracks that is the right repair. Filling a crack that is still opening hides the evidence, and it will usually come back. If a filled crack returns within a year or two, have it assessed.

What causes vertical cracks in walls?

Vertical cracks are most often caused by thermal or moisture movement in long walls, or by the joint between old and newer work. An even-width vertical crack is usually cosmetic. One clearly wider at the top or bottom can indicate foundation movement at one end.

Other structural repairs in Sevenoaks

Structural crack repairs near Sevenoaks

Send photos of the crack at your Sevenoaks property, close up and from a distance, for a free initial assessment and a no-obligation written quote.