Floor joist repairs in Slough

Postcodes: SL1, SL2, SL3
Population: about 160,000
Area: Berkshire
Pricing region: South East

What is the ground like in Berkshire?

Postcode districts SL1, SL2, SL3 cover Slough, a Berkshire town of about 160,000 people. If you are just outside Slough, we also cover Maidenhead (5 miles), Gerrards Cross (6 miles) and Egham (6 miles).

Much of Berkshire sits on clay that shrinks in dry summers and swells in wet winters. Ground movement here is more often linked to soils, drains and trees than to mining. Typical buildings in Berkshire: Victorian and Edwardian terraces in Reading and Windsor, 1930s semis, and large post-war new-town estates around Bracknell.

Methods for floor joist repairs

Sistering a joist

A new length of treated timber, the same depth as the original, is bolted or screwed alongside the damaged joist so the two share the load. It is the quickest fix for a notched, cracked or sagging joist that is otherwise sound, usually after lifting a few boards.

Best for: Cut, cracked or sagging joists with sound ends

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.
Repair the structure
Boards are lifted and numbered if they are going back, and rotten timber is cut out. New treated timber is fixed and checked with a level before strutting, hangers and any restraint straps go in.

Symptoms that point to floor joist repairs

A gap opening up between the skirting board and the floor
Ceiling cracks below that follow the line of the joists
Floor bouncing, or ornaments rattling, when someone walks across

Guide prices for floor joist repairs in Slough

Guide prices below are for homes in Slough, on South East rates and including VAT. A survey or good photos let us turn them into a fixed written price.

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

What is the price of floor joist repairs in Slough?

Guide prices for floor joist repairs in Slough 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.

Do you carry out floor joist repairs in Slough?

Yes. We take enquiries from across Slough, including SL1, SL2, SL3, and from nearby places such as Maidenhead and Gerrards Cross. Send photos for a free initial view and we will tell you what happens next.

Does the ground around Slough cause cracking?

East Berkshire is largely London Clay with Thames terrace gravels along the river, while the west rises onto chalk downland. Houses on the clay near Slough, Windsor and Bracknell are the ones most exposed to shrink-swell movement. 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 causes rot in floor joists?

Damp causes almost all joist rot. Joist ends in damp walls, voids with blocked air bricks, leaking pipes and high outside ground levels keep timber wet enough for fungi to grow. Replacing timber without fixing the damp usually means the rot returns.

More repairs we carry out in Slough

Floor joist repairs near Slough

For a guide price on floor joist repairs in Slough, use the quote tool or send photos of the dip, any soft boards and the air bricks.