Floor joist repairs in Chippenham

Postcodes: SN14, SN15
Population: about 36,000
Area: Wiltshire
Pricing region: South West

What should you know about the ground under Chippenham?

We cover Chippenham and its postcode districts SN14, SN15, part of Wiltshire, with a population of roughly 36,000. If you are just outside Chippenham, we also cover Calne (5 miles), Melksham (6 miles) and Devizes (9 miles).

Wiltshire has a mix of ground, with clay in some places and firmer rock in others. Ground movement here is more often linked to soils, drains and trees than to mining. Housing stock in Wiltshire: Stone cottages, railway terraces in Swindon, and large post-war and new-build estates.

Repair options we may recommend

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

What to expect when we carry out floor joist repairs

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.

Is it time for floor joist repairs? Common signs

A gap opening up between the skirting board and the floor
Floor bouncing, or ornaments rattling, when someone walks across
Soft or spongy boards near outside walls, hearths or the bathroom

What should you budget for floor joist repairs in Chippenham?

These are guide prices for Chippenham, using South West rates and including VAT. Your written quote follows photos or a survey, and is fixed once the repair is specified.

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

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.

Your floor joist repairs questions

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

Guide prices for floor joist repairs in Chippenham 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.

Can you survey a property in Chippenham?

We do. Chippenham and the surrounding area are covered, including nearby Calne and Melksham. A free initial assessment from your photos is the first step.

Why do houses in Wiltshire crack?

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.

Do I need building control for floor joist repairs?

Usually not for like-for-like repairs to a few joists, but replacing a whole floor structure can be building work. In Scotland that generally needs a building warrant, and in Northern Ireland council building control applies. We deal with building control where the work needs it.

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 Chippenham

Floor joist repairs near Chippenham

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