Johnstone · Renfrewshire and Inverclyde
Roof structure repairs in Johnstone
Roof structure repairs in Johnstone are often done entirely from inside the loft, with the tiles left in place. Doubling rafters, adding struts and fitting ties rarely needs the coverings off unless decay at the eaves is severe.
Guide price from£285per rafter inc VAT
- Postcodes
- PA5
- Population
- about 16,000
- Area
- Renfrewshire and Inverclyde
- Pricing region
- Scotland
Is Renfrewshire and Inverclyde prone to ground movement?
Johnstone, Renfrewshire and Inverclyde: about 16,000 residents across postcode districts PA5. Neighbouring towns we cover: 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. Across Renfrewshire and Inverclyde, most homes are sandstone tenements, villas in East Renfrewshire, and post-war estates.
Which repair method suits a home in Johnstone?
Repairing or doubling rafters
Cracked, sagging or rotten rafters are strengthened by fixing a new timber alongside, often called doubling, and rotten rafter feet are cut back and spliced. The work is usually done from inside the loft with the tiles left in place, unless the covering is coming off anyway.
Best for: Individual rafters that have cracked, sagged or rotted at the feet
Wall plate replacement
Rotten or crushed wall plates are replaced in short lengths while the rafters above are propped, and bedded on the wall in mortar. The plate is then strapped down to the masonry. It is often combined with rafter foot splices along the same run.
Best for: Rot along the eaves where rafters bear on the wall
What happens when we carry out roof structure repairs in Johnstone?
Send photos
Photograph the roof from across the street, both slopes if you can, and the loft timbers with a torch. Include the eaves and any cracks just below them. From these we can usually tell sag from spread and whether an engineer is needed.
Engineer’s design where needed
Where purlins, struts or ties must be redesigned, or the roof carries a heavier covering, an independent chartered structural engineer is appointed to specify the work. We can arrange this, and their design sets the sizes and fixings.
Prop, strengthen and tie
The roof is propped where members are being changed, then rafters, purlins, struts and ties are repaired or added as specified. Coverings disturbed by the work are relaid, and building control inspects where the work needs it.
Signs you may need roof structure repairs
- Top of an outside wall leaning out at eaves level
- Daylight through the tiles, or timber that is damp, stained or crumbling
- Ridge line dipping in the middle when seen from the street
How much will roof structure repairs cost in Johnstone?
The ranges below reflect typical Scotland costs for roof structure repairs, including VAT. Scaffold, access and making good can push a job to the top of the range.
| Item | Guide price | Per |
|---|---|---|
| Repairing or doubling a rafter | £285 – £570 | per rafter |
| Purlin and strut strengthening | £1,150 – £2,850 | per roof |
| Tying in roof spread (straps and ties)est. | £760 – £2,400 | per roof |
Rules for roof structure repairs in Scotland
In Scotland, underpinning and other structural alterations generally need a building warrant from the council’s building standards service before work starts, and a completion certificate at the end; small like-for-like repairs often do not. There is no Party Wall Act in Scotland; shared walls are covered by title deeds and, for flats, the Tenements (Scotland) Act 2004.
Roof structure repairs in Johnstone: questions and answers
What is the price of roof structure repairs in Johnstone?
Guide prices for roof structure repairs in Johnstone start from about £285 per rafter, 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 roof structure repairs in Johnstone?
Yes. We take enquiries from across Johnstone, including PA5, and from nearby places such as Paisley and Barrhead. Send photos for a free initial view and we will tell you what happens next.
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.
Why are there cracks just below the eaves?
A horizontal crack just below the eaves, along the front or back wall, is a common sign of roof spread. The rafters push the top of the wall outward and the masonry cracks where it hinges. Corroded wall ties can cause similar cracks, so the cause needs checking.
What is roof spread?
Roof spread is when the feet of the rafters move outward because nothing is tying them together firmly enough. As they spread, the ridge drops and the tops of the walls are pushed out, often with a horizontal crack below the eaves. It is fixed by adding ties, collars or straps, sometimes with rebuilding.
More repairs we carry out in Johnstone
Roof structure repairs near Johnstone
For a guide price on roof structure repairs in Johnstone, try the quote tool or send photos of the ridge, the loft and the eaves.