Floor joist repairs in Devizes

Postcodes: SN10
Population: about 17,000
Area: Wiltshire
Pricing region: South West

Why does the ground in Wiltshire matter for floor joist repairs?

Postcode districts SN10 cover Devizes, a Wiltshire town of about 17,000 people. Neighbouring towns we cover: Calne (6 miles), Melksham (6 miles) and Chippenham (9 miles).

Clay soils are found in parts of Wiltshire. Ground movement here is more often linked to soils, drains and trees than to mining. What you mostly find across Wiltshire: stone cottages, railway terraces in Swindon, and large post-war and new-build estates.

What happens during floor joist repairs, step by step?

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.
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.
Relay and ventilate
Boards are relaid or replaced, skirting refitted and air bricks cleared or added outside. We point out anything that would let damp back in, such as soil heaped against the wall, so the repair lasts.

What to look for before calling about floor joist repairs

Floor bouncing, or ornaments rattling, when someone walks across
Floor dipping towards an outside wall or in the middle of the room
Soft or spongy boards near outside walls, hearths or the bathroom

Floor joist repairs prices in Devizes

The ranges below reflect typical South West costs for floor joist repairs, including VAT. Scaffold, access and making good can push a job to the top of the range.

Guide prices inc VAT on South West rates. Items marked est. are our estimates.
Item	Guide price	Per
Splicing or sistering a damaged joist	£260 – £410	per joist
Whole room of joists and boards	£2,050 – £6,200	per room
Sleeper wall rebuild and ventilationest.	£410 – £1,550	per room

How we usually approach floor joist repairs

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

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

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.

Questions about floor joist repairs in Devizes

How much will floor joist repairs cost in Devizes?

Guide prices for floor joist repairs in Devizes start from about £260 per joist, including VAT, on South West rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.

Do you cover Devizes?

Yes. We take enquiries from across Devizes, including SN10, and from nearby places such as Calne and Melksham. Send photos for a free initial view and we will tell you what happens next.

Is the ground in Wiltshire prone to subsidence?

Southern Wiltshire is chalk, while the north around Swindon, Chippenham and Trowbridge sits on Oxford and Kimmeridge Clays that are prone to seasonal movement near trees. Bath stone was mined underground around Corsham. Only an investigation can say why a particular building has moved.

Is a sagging floor dangerous?

A gentle, long-standing sag is usually not dangerous, and many older floors have moved slightly over a century. A sag that is getting worse, soft boards or a floor dropping near a wall needs checking soon, because rotten joist ends can lose their bearing.

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.

Other structural repairs in Devizes

Floor joist repairs near Devizes

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