Hertford · Hertfordshire
Floor joist repairs in Hertford
Houses in Hertford and across Hertfordshire 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£260per joist inc VAT
- Postcodes
- SG13, SG14
- Population
- about 26,000
- Area
- Hertfordshire
- Pricing region
- East of England
Is Hertfordshire prone to ground movement?
Hertford is in Hertfordshire and takes in postcode districts SG13, SG14. About 26,000 people live there. We also take enquiries from nearby Ware (2 miles), Hoddesdon (4 miles) and Welwyn Garden City (6 miles).
Shrinkable clay is widespread in Hertfordshire. Ground movement here is more often linked to soils, drains and trees than to mining. Typical buildings in Hertfordshire: Garden-city houses in Letchworth and Welwyn, 1930s semis, Victorian terraces and post-war new-town estates.
What to look for before calling about floor joist repairs
- Soft or spongy boards near outside walls, hearths or the bathroom
- A gap opening up between the skirting board and the floor
- Floor dipping towards an outside wall or in the middle of the room
Floor joist repairs prices in Hertford
Guide prices below are for homes in Hertford, on East of England rates and including VAT. A survey or good photos let us turn them into a fixed written price.
| 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 |
How we usually approach floor joist repairs
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
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
What happens during floor joist repairs, step by step?
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.
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.
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.
Questions about floor joist repairs in Hertford
How much will floor joist repairs cost in Hertford?
Guide prices for floor joist repairs in Hertford 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.
Do you cover Hertford?
Yes. We take enquiries from across Hertford, including SG13, SG14, and from nearby places such as Ware and Hoddesdon. Send photos for a free initial view and we will tell you what happens next.
Is the ground in Hertfordshire prone to subsidence?
South Hertfordshire around Watford, Borehamwood and Potters Bar is London Clay, while the north and west are chalk with clay-with-flints and the east has boulder clay. The clay areas are prone to seasonal subsidence near trees. Only an investigation can say why a particular building has moved.
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.
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.
Other structural repairs in Hertford
- Boundary and garden wall repairs
- Crack stitching
- Brick arch repairs
- Structural surveys and crack monitoring
- Wall tie replacement
Floor joist repairs near Hertford
Each joist, sleeper wall and air brick at your Hertford property is itemised in the written quote, then fixed in price once the repair is specified.