Northampton · Northamptonshire
Floor joist repairs in Northampton
A sagging or springy floor in a Northampton home usually has a simple explanation once a few boards are lifted. Rotten joist ends, careless notching and blocked air bricks account for most dipping floors in older houses, and each one has a clear, well-understood repair.
Guide price from£245per joist inc VAT
- Postcodes
- NN1, NN2, NN3, NN4, NN7
- Population
- about 250,000
- Area
- Northamptonshire
- Pricing region
- East Midlands
Is Northamptonshire prone to ground movement?
Northampton is in Northamptonshire and takes in postcode districts NN1, NN2, NN3, NN4, NN7. About 250,000 people live there. Nearby, we also cover Wellingborough (9 miles), Daventry (12 miles) and Rushden (12 miles).
Shrinkable clay is widespread in Northamptonshire. Historic ironstone working has left disturbed ground in places. What you mostly find across Northamptonshire: ironstone and limestone cottages, Victorian terraces in Northampton and Kettering, and new-town estates in Corby.
Is it time for floor joist repairs? Common signs
- Floor dipping towards an outside wall or in the middle of the room
- Floor bouncing, or ornaments rattling, when someone walks across
- A gap opening up between the skirting board and the floor
What should you budget for floor joist repairs in Northampton?
For Northampton we use East Midlands 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 | £245 – £390 | per joist |
| Whole room of joists and boards | £1,950 – £5,900 | per room |
| Sleeper wall rebuild and ventilationest. | £390 – £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
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
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.
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.
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 will floor joist repairs cost in Northampton?
Guide prices for floor joist repairs in Northampton start from about £245 per joist, including VAT, on East Midlands rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.
Do you cover Northampton?
Yes. We take enquiries from across Northampton, including NN1, NN2, NN3, NN4, and from nearby places such as Wellingborough and Daventry. Send photos for a free initial view and we will tell you what happens next.
Is the ground in Northamptonshire prone to subsidence?
Northamptonshire sits largely on Lias clay and Jurassic ironstones and limestones, with historic ironstone quarrying around Corby and Kettering. The clay vales are prone to shrinkage near trees. 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.
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.
Other structural repairs in Northampton
- Gable end wall repairs
- Resin injection ground stabilisation
- Extension pulling away repairs
- Subsidence insurance claim repairs
- Bowing wall repairs
Floor joist repairs near Northampton
Get a free initial assessment of a sagging floor in Northampton from your photos or a call, before you commit to anything.