Harwich · Essex
Floor joist repairs in Harwich
If your floor in Harwich 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£260per joist inc VAT

- Postcodes
- CO12
- Population
- about 21,000
- Area
- Essex
- Pricing region
- East of England
What is the ground like in Essex?
Harwich (CO12) has around 21,000 residents and sits in Essex. We also take enquiries from nearby Felixstowe (3 miles), Walton-on-the-Naze (7 miles) and Ipswich (10 miles).
Shrinkable clay is widespread in Essex. Ground movement here is more often linked to soils, drains and trees than to mining. Typical buildings in Essex: Victorian terraces, 1930s semis and bungalows, and large post-war new-town estates in Basildon and Harlow.
What happens when we carry out floor joist repairs in Harwich?
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.
Written quote
You get a no-obligation written quote listing which joists are sistered, spliced or replaced and any sleeper wall or ventilation work. It becomes a fixed price in writing once the repair is specified.
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
- Floor dipping towards an outside wall or in the middle of the room
- A musty smell, or fungal strands showing between the boards
- Ceiling cracks below that follow the line of the joists
How much will floor joist repairs cost in Harwich?
Prices in Harwich are worked out on East of England rates. They include VAT and are a starting point: access, the extent of the damage and whether an engineer or building control is involved all move the figure.
| Item | Guide price | Per |
|---|---|---|
| Splicing or sistering a damaged joist | £260 – £420 | per joist |
| Whole room of joists and boards | £2,100 – £6,300 | per room |
| Sleeper wall rebuild and ventilationest. | £420 – £1,600 | per room |
Which repair method suits a home in Harwich?
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
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
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 Harwich: questions and answers
How much should I budget for floor joist repairs in Harwich?
Guide prices for floor joist repairs in Harwich start from about £260 per joist, including VAT, on East of England 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 Harwich?
Yes. We take enquiries from across Harwich, including CO12, and from nearby places such as Felixstowe and Walton-on-the-Naze. Send photos for a free initial view and we will tell you what happens next.
Why do houses in Essex crack?
London Clay covers much of south and central Essex and boulder clay much of the north, making it one of the counties most affected by clay shrinkage in dry summers. Street and garden trees close to houses add to the risk. 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.
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.
Related work in Harwich
- Concrete repairs
- Structural surveys and crack monitoring
- Structural crack repairs
- Chimney stack repairs
- Resin injection ground stabilisation
Floor joist repairs near Harwich
Got a bouncy or sinking floor in Harwich? Send a short video of someone walking across it, and we will tell you what it is likely to need.