Johnstone · Renfrewshire and Inverclyde
Floor joist repairs in Johnstone
Floor joist repairs in Johnstone start underneath the boards, not on top of them. We look at the joist ends, the sleeper walls and the ventilated void before suggesting sistering, splicing or replacement, so the price reflects the timber you actually have.
Guide price from£240per joist inc VAT
- Postcodes
- PA5
- Population
- about 16,000
- Area
- Renfrewshire and Inverclyde
- Pricing region
- Scotland
Why does the ground in Renfrewshire and Inverclyde matter for floor joist repairs?
Johnstone is in Renfrewshire and Inverclyde and takes in postcode districts PA5. About 16,000 people live there. Nearby places we cover include Paisley (3 miles), Barrhead (5 miles) and Renfrew (6 miles).
Shrinkable clay is less common in Renfrewshire and Inverclyde than in south-east England. Parts of Renfrewshire and Inverclyde lie on a former coalfield, so a coal mining search is worth checking if movement has no obvious cause. Housing stock in Renfrewshire and Inverclyde: Sandstone tenements, villas in East Renfrewshire, and post-war estates.
From first photo to finished repair
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.
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.
Symptoms that point to floor joist repairs
- Floor bouncing, or ornaments rattling, when someone walks across
- Ceiling cracks below that follow the line of the joists
- A gap opening up between the skirting board and the floor
Guide prices for floor joist repairs in Johnstone
Guide prices below are for homes in Johnstone, on Scotland 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 | £240 – £380 | per joist |
| Whole room of joists and boards | £1,900 – £5,700 | per room |
| Sleeper wall rebuild and ventilationest. | £380 – £1,400 | per room |
Methods for floor joist repairs
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 Scotland
In Scotland, small repairs often do not need a building warrant, but structural alterations and strengthening generally do. Check with the council’s building standards service if unsure; there is no Party Wall Act in Scotland.
Frequently asked questions
What is the price of floor joist repairs in Johnstone?
Guide prices for floor joist repairs in Johnstone start from about £240 per joist, including VAT, on Scotland rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.
Do you carry out floor joist repairs in Johnstone?
Yes, Johnstone is covered, along with postcode districts PA5. We also cover nearby Paisley and Barrhead.
Does the ground around Johnstone cause cracking?
Renfrewshire has glacial till and Clyde alluvium with coal workings recorded in parts, while Inverclyde's towns climb steep slopes above the Clyde with many retaining walls. Only an investigation can say why a particular building has moved.
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.
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.
More repairs we carry out in Johnstone
Floor joist repairs near Johnstone
Got a bouncy or sinking floor in Johnstone? Send a short video of someone walking across it, and we will tell you what it is likely to need.