Floor joist repairs in Dorking

Postcodes: KT23, RH4
Population: about 18,000
Area: Surrey
Pricing region: South East

What is the ground like in Surrey?

We cover Dorking and its postcode districts KT23, RH4, part of Surrey, with a population of roughly 18,000. Nearby, we also cover Leatherhead (4 miles), Redhill (7 miles) and Cobham (8 miles).

Shrinkable clay is widespread in Surrey. Ground movement here is more often linked to soils, drains and trees than to mining. Across Surrey, most homes are Victorian and Edwardian villas, 1930s semis and detached houses in the commuter towns, and post-war estates.

Methods for floor joist repairs

Replacing joists and boards

When rot or woodworm runs through most of a floor, it is usually cheaper to replace the joists, strutting and boards together. Where joists run parallel to an outside wall, restraint straps tie the new floor back to it so the wall keeps its lateral support.

Best for: Widespread rot, or a whole floor that has dropped

Splicing ends and fitting hangers

Where only the end has rotted, it is cut back to sound timber and a new piece is fixed alongside, bearing on the wall or on a new joist hanger. Missing or under-nailed hangers elsewhere are replaced at the same time. The damp in the wall must be fixed too.

Best for: Rotten joist ends in damp solid walls

From first photo to finished repair

Photos and a call
Send photos of the dip or soft area, the outside wall at ground level and any air bricks. A short call about when it started, and any recent plumbing or heating work, tells us whether the problem is local or widespread.
Lift boards and inspect
On site we lift a few boards where the floor is worst and check the joist ends, sleeper walls and void with a moisture meter. Outside, we look for high ground, blocked vents and leaks keeping the timber wet.
Written quote
You get a no-obligation written quote listing which joists are sistered, spliced or replaced and any sleeper wall or ventilation work. It becomes a fixed price in writing once the repair is specified.

Symptoms that point to floor joist repairs

Floor bouncing, or ornaments rattling, when someone walks across
Ceiling cracks below that follow the line of the joists
Soft or spongy boards near outside walls, hearths or the bathroom

Guide prices for floor joist repairs in Dorking

Prices in Dorking are worked out on South East rates. They include VAT and are a starting point: access, the extent of the damage and whether an engineer or building control is involved all move the figure.

Guide prices inc VAT on South East rates. Items marked est. are our estimates.
Item	Guide price	Per
Splicing or sistering a damaged joist	£280 – £450	per joist
Whole room of joists and boards	£2,250 – £6,700	per room
Sleeper wall rebuild and ventilationest.	£450 – £1,700	per room

Rules for floor joist 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.

Frequently asked questions

How much should I budget for floor joist repairs in Dorking?

Guide prices for floor joist repairs in Dorking start from about £280 per joist, 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.

Can you survey a property in Dorking?

We do. Dorking and the surrounding area are covered, including nearby Leatherhead and Redhill. A free initial assessment from your photos is the first step.

Why do houses in Surrey crack?

North Surrey sits on London Clay, the south on Weald Clay, with chalk along the North Downs and sands in the west. Large gardens with mature trees on clay make seasonal subsidence a familiar problem. Only an investigation can say why a particular building has moved.

Will my insurance pay for rotten floor joists?

Usually not, because rot, woodworm and gradual wear are standard exclusions. Damage from a sudden escape of water, or a floor that dropped through subsidence, may be treated differently. Check your policy, and tell your insurer before permanent repairs start if either applies.

What is sistering a floor joist?

Sistering is fixing a new length of timber alongside an existing joist so the two share the load. It strengthens a notched, cracked or sagging joist without removing it, so it is quicker and less disruptive than replacement.

Related work in Dorking

Floor joist repairs near Dorking

Got a bouncy or sinking floor in Dorking? Send a short video of someone walking across it, and we will tell you what it is likely to need.