Thornaby-on-Tees · North Yorkshire
Floor joist repairs in Thornaby-on-Tees
If your floor in Thornaby-on-Tees dips by a wall or bounces in the middle of the room, the joists are worth checking. Send photos of the floor, the outside wall at ground level and any air bricks, and we will tell you what the pattern suggests.
Guide price from£240per joist inc VAT

- Postcodes
- TS16, TS17, TS18
- Population
- about 22,000
- Area
- North Yorkshire
- Pricing region
- Yorkshire and the Humber
What is the ground like in North Yorkshire?
With roughly 22,000 people, Thornaby-on-Tees spans postcode districts TS16, TS17, TS18 in North Yorkshire. Nearby, we also cover Stockton-on-Tees (3 miles), Yarm (3 miles) and Middlesbrough (4 miles).
Clay soils are found in parts of North Yorkshire. Parts of North Yorkshire lie on a former coalfield, so a coal mining search is worth checking if movement has no obvious cause. What you mostly find across North Yorkshire: stone cottages, Georgian and Victorian houses in York and Harrogate, and brick terraces on Teesside.
What happens when we carry out floor joist repairs in Thornaby-on-Tees?
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.
Signs you may need floor joist repairs
- A musty smell, or fungal strands showing between the boards
- Soft or spongy boards near outside walls, hearths or the bathroom
- A gap opening up between the skirting board and the floor
How much will floor joist repairs cost in Thornaby-on-Tees?
For Thornaby-on-Tees we use Yorkshire and the Humber rates. Treat the table as a budget guide, inc VAT; the price you pay is the one on your written quote.
| Item | Guide price | Per |
|---|---|---|
| Splicing or sistering a damaged joist | £240 – £380 | per joist |
| Whole room of joists and boards | £1,900 – £5,700 | per room |
| Sleeper wall rebuild and ventilationest. | £380 – £1,400 | per room |
Which repair method suits a home in Thornaby-on-Tees?
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
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.
Floor joist repairs in Thornaby-on-Tees: questions and answers
How much should I budget for floor joist repairs in Thornaby-on-Tees?
Guide prices for floor joist repairs in Thornaby-on-Tees start from about £240 per joist, including VAT, on Yorkshire and the Humber 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 Thornaby-on-Tees?
Yes, Thornaby-on-Tees is covered, along with postcode districts TS16, TS17, TS18. We also cover nearby Stockton-on-Tees and Yarm.
Why do houses in North Yorkshire crack?
North Yorkshire ranges from limestone dales and moors to clays and glacial deposits in the Vale of York, with the Selby coalfield in the south and ironstone workings in Cleveland. Teesside has areas of soft and made ground. Only an investigation can say why a particular building has moved.
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.
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.
Related work in Thornaby-on-Tees
- Chimney stack repairs
- Structural surveys and crack monitoring
- Resin injection ground stabilisation
- Roof structure repairs
- Bowing wall repairs
Floor joist repairs near Thornaby-on-Tees
Got a bouncy or sinking floor in Thornaby-on-Tees? Send a short video of someone walking across it, and we will tell you what it is likely to need.