Dartford · Kent
Lintel replacement in Dartford
Bay windows on older houses around Dartford often hide a timber lintel behind the face brickwork. When that timber rots, the bay brickwork drops and cracks, and replacing it properly means supporting the wall above throughout the job.
Guide price from£840per opening inc VAT
- Postcodes
- DA1
- Population
- about 51,000
- Area
- Kent
- Pricing region
- South East
Is Kent prone to ground movement?
Dartford (DA1) has around 51,000 residents and sits in Kent. Neighbouring towns we cover: Bexley (3 miles), Swanley (4 miles) and Swanscombe (4 miles).
Kent is one of the parts of the UK where clay soils are most likely to move with the seasons. 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.
Lintel replacement prices in Dartford
These are guide prices for Dartford, 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 |
|---|---|---|
| Standard window or door opening | £840 – £2,800 | per opening |
| Wide or bay openingest. | £2,250 – £5,050 | per opening |
| Making good inside and outest. | £170 – £670 | per opening |
How we usually approach lintel replacement
Replacement with a cavity tray
A damp-proof membrane is laid over the new lintel with stop ends and weep holes, so water running down the cavity is directed out rather than into the house. Many older lintels were installed without one, which is often why they failed.
Best for: Cavity walls with damp above windows
Propping and needling
Adjustable props carry the wall above while the old lintel comes out. For heavier walls, short steel needles are passed through holes cut above the opening and propped on both sides, taking the load off the lintel completely. The supports stay until the new work has set.
Best for: Openings with heavy walls, upper floors or bay windows above
What happens during lintel replacement, step by step?
Inspect the opening
We look at the crack pattern, the type of lintel and what sits above it. Pictures of both faces of the window, plus any visible lintel edge, help us judge it before visiting.
Specify the replacement
We confirm the lintel type, length and bearing needed. For wide openings, bays or walls with unusual loads, an engineer may specify it, and where the repair needs an engineer’s design or sign-off we can arrange one.
Support the wall
Props or needles are set so the brickwork above carries no load on the old lintel. Windows are protected or temporarily removed where the work demands it, and the room inside is sheeted against dust.
What to look for before calling about lintel replacement
- A diagonal crack climbing away from a window head
- Brickwork above an opening visibly dipping in the middle
- Damp patches on the inside wall just above a window
Rules for lintel replacement in England
In England, underpinning and other work that alters or strengthens a wall or foundation is building work under the Building Regulations (Part A, structure), so building control approves and inspects it. Like-for-like repairs often are not, and we tell you which applies before a price is agreed. Work to a party wall, or excavation close to a neighbour’s foundations, can also need a notice under the Party Wall etc. Act 1996.
Questions about lintel replacement in Dartford
What is the price of lintel replacement in Dartford?
Guide prices for lintel replacement in Dartford start from about £840 per opening, 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 carry out lintel replacement in Dartford?
Yes. We take enquiries from across Dartford, including DA1, and from nearby places such as Bexley and Swanley. Send photos for a free initial view and we will tell you what happens next.
Does the ground around Dartford cause cracking?
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.
How long does it take to replace a lintel?
Most single lintels are replaced in one to two days. The props stay in until the mortar has gained enough strength, and wide bays or openings with both inner and outer lintels can take longer. The window can usually be used again once the supports come out.
Do I need building regulations approval to replace a lintel?
In England and Wales, replacing a lintel is structural work and building control will usually need to approve it. Rules differ in Scotland and Northern Ireland. We deal with building control where the work needs it, and include the cost in the quote.
More repairs we carry out in Dartford
Lintel replacement near Dartford
Our quote tool shows guide prices for a Dartford lintel replacement; add photos and we can confirm the likely opening size and type.