Sunderland · Tyne and Wear
Floor joist repairs in Sunderland
Houses in Sunderland and across Tyne and Wear with suspended timber ground floors rely on dry walls and a ventilated void to stay sound. When either fails, rot usually starts at the edges of the room long before anything shows in the middle.
Guide price from£230per joist inc VAT
- Postcodes
- SR1, SR2, SR9
- Population
- about 170,000
- Area
- Tyne and Wear
- Pricing region
- North East
What should you know about the ground under Sunderland?
Sunderland (SR1, SR2, SR9) has around 170,000 residents and sits in Tyne and Wear. Nearby places we cover include Seaham (5 miles), Washington (5 miles) and Houghton-le-Spring (6 miles).
Tyne and Wear has a mix of ground, with clay in some places and firmer rock in others. Historic coal workings are recorded beneath parts of Tyne and Wear, and a coal mining search is worth checking where movement is unexplained. Across Tyne and Wear, most homes are Tyneside flats and terraces, Victorian villas, inter-war council estates and post-war semis.
From first photo to finished repair
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.
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.
Symptoms that point to floor joist repairs
- Floor dipping towards an outside wall or in the middle of the room
- A gap opening up between the skirting board and the floor
- Floor bouncing, or ornaments rattling, when someone walks across
Guide prices for floor joist repairs in Sunderland
These are guide prices for Sunderland, using North East rates and including VAT. Your written quote follows photos or a survey, and is fixed once the repair is specified.
| Item | Guide price | Per |
|---|---|---|
| Splicing or sistering a damaged joist | £230 – £370 | per joist |
| Whole room of joists and boards | £1,850 – £5,500 | per room |
| Sleeper wall rebuild and ventilationest. | £370 – £1,400 | per room |
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
Sleeper walls and ventilation
Settled or damp sleeper walls are rebuilt on a sound base with a damp-proof course under new timber plates. Blocked air bricks are cleared, extra ones added where the void has dead spots, and soil or paving heaped against the outside wall is lowered.
Best for: Damp ground floor voids or joists on poor supports
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 will floor joist repairs cost in Sunderland?
Guide prices for floor joist repairs in Sunderland start from about £230 per joist, including VAT, on North East rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.
Do you cover Sunderland?
Yes. We take enquiries from across Sunderland, including SR1, SR2, SR9, and from nearby places such as Seaham and Washington. Send photos for a free initial view and we will tell you what happens next.
Is the ground in Tyne and Wear prone to subsidence?
Tyne and Wear lies on the Durham and Northumberland coalfield, with old shallow workings recorded beneath parts of Newcastle, Gateshead and Sunderland, mostly under a cover of glacial clay. Only an investigation can say why a particular building has moved.
Why is my floor bouncy?
A bouncy floor usually means the joists are deflecting too much, often because they span too far, have lost their strutting or have been weakened by notches. It rarely means imminent failure, but it is worth checking, especially if the bounce appeared after work in the room.
Can floor joists be repaired without taking up the whole floor?
Yes, in most cases only the boards over the affected joists need lifting, and three or four boards are often enough to sister a joist or splice a rotten end. Widespread rot is the exception, because the whole floor must come up to remove the decay.
Other structural repairs in Sunderland
- Retaining wall repairs
- Resin injection ground stabilisation
- Structural surveys and crack monitoring
- Brick arch repairs
- Lintel replacement
Floor joist repairs near Sunderland
If a floor in Sunderland has dropped after plumbing or heating work, send photos of any lifted boards and notches, and we will price the strengthening.