Blackburn · Lancashire
Floor joist repairs in Blackburn
If your floor in Blackburn 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
- BB1, BB2
- Population
- about 150,000
- Area
- Lancashire
- Pricing region
- North West
What is the ground like in Lancashire?
Blackburn, Lancashire: about 150,000 residents across postcode districts BB1, BB2. Neighbouring towns we cover: Darwen (4 miles), Accrington (5 miles) and Chorley (9 miles).
Lancashire has a mix of ground, with clay in some places and firmer rock in others. Parts of Lancashire lie on a former coalfield, so a coal mining search is worth checking if movement has no obvious cause. What you mostly find across Lancashire: stone and brick mill terraces, seaside villas in Blackpool and Lytham, and inter-war and post-war semis.
What should you budget for floor joist repairs in Blackburn?
Prices in Blackburn are worked out on North West 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 | £240 – £385 | per joist |
| Whole room of joists and boards | £1,900 – £5,750 | per room |
| Sleeper wall rebuild and ventilationest. | £385 – £1,450 | per room |
Repair options we may recommend
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
What to expect when we carry out floor joist repairs
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.
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.
Is it time for floor joist repairs? Common signs
- A gap opening up between the skirting board and the floor
- Ceiling cracks below that follow the line of the joists
- Floor bouncing, or ornaments rattling, when someone walks across
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 Blackburn?
Guide prices for floor joist repairs in Blackburn start from about £240 per joist, including VAT, on North 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 Blackburn?
Yes, Blackburn is covered, along with postcode districts BB1, BB2. We also cover nearby Darwen and Accrington.
Why do houses in Lancashire crack?
Lancashire is mostly glacial till over sandstone and mudstone, with the Burnley and Accrington coalfield in the east and soft coastal and estuarine ground on the Fylde. Old mill and mine sites leave made ground in many towns. 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.
Related work in Blackburn
- Structural crack repairs
- Subsidence repairs
- Lintel replacement
- Bay window subsidence repairs
- Extension pulling away repairs
Floor joist repairs near Blackburn
Each joist, sleeper wall and air brick at your Blackburn property is itemised in the written quote, then fixed in price once the repair is specified.