Southwark · Greater London
Roof structure repairs in Southwark
Roofs in Southwark that were re-covered with heavier concrete tiles, or had struts cut out for a loft room, often start to sag years later. Spotting which change caused the movement is the first step to a repair that holds.
Guide price from£375per rafter inc VAT
- Postcodes
- SE1, SE5, SE8, SE11, SE14
- Population
- about 310,000
- Area
- Greater London
- Pricing region
- London
Why does the ground in Greater London matter for roof structure repairs?
Southwark takes in postcode districts including SE1, SE5, SE8, SE11, SE14, with about 310,000 residents. If you are just outside Southwark, we also cover Lambeth (2 miles), Lewisham (3 miles) and Tower Hamlets (4 miles).
Shrinkable clay is widespread in Greater London. Ground movement here is more often linked to soils, drains and trees than to mining. Across Greater London, most homes are Victorian and Edwardian terraces with shallow footings, inter-war semis in the outer boroughs, and converted flats and mansion blocks.
Methods for roof structure repairs
Tying in roof spread
New ties, collars or steel straps connect opposite rafters, or fix the rafter feet and wall plate firmly to the ceiling joists, so the outward thrust is resisted. Leaning wall heads are strapped back to the roof, and a badly spread roof may need partly rebuilding first.
Best for: Walls pushed out at eaves level by spreading rafters
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
From first photo to finished repair
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.
Written quote
You receive a no-obligation written quote listing each timber repair, any ties or straps, propping, scaffolding and making good. Once the repair is specified, the figure becomes a fixed price in writing.
Symptoms that point to roof structure repairs
- Daylight through the tiles, or timber that is damp, stained or crumbling
- Ridge line dipping in the middle when seen from the street
- Roof slope looking hollow or wavy between the ridge and the gutter
Guide prices for roof structure repairs in Southwark
These are guide prices for Southwark, using London rates and including VAT. Your written quote follows photos or a survey, and is fixed once the repair is specified.
| Item | Guide price | Per |
|---|---|---|
| Repairing or doubling a rafter | £375 – £750 | per rafter |
| Purlin and strut strengthening | £1,500 – £3,750 | per roof |
| Tying in roof spread (straps and ties)est. | £1,000 – £3,100 | per roof |
Rules for roof structure repairs in England
In England, underpinning and other work that alters or strengthens a wall or foundation is building work under the Building Regulations (Part A, structure), so building control approves and inspects it. Like-for-like repairs often are not, and we tell you which applies before a price is agreed. Work to a party wall, or excavation close to a neighbour’s foundations, can also need a notice under the Party Wall etc. Act 1996.
Frequently asked questions
What is the price of roof structure repairs in Southwark?
Guide prices for roof structure repairs in Southwark start from about £375 per rafter, including VAT, on London 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 Southwark?
Yes. We take enquiries from across Southwark, including SE1, SE5, SE8, SE11, and from nearby places such as Lambeth and Lewisham. Send photos for a free initial view and we will tell you what happens next.
Does the ground around Southwark cause cracking?
Most of Greater London sits on London Clay, among the most shrinkage-prone ground in the UK, with river gravels along the Thames. Subsidence claims here are among the most frequent in the country, especially after dry summers and near street and garden trees. Only an investigation can say why a particular building has moved.
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.
Can the roof be strengthened without removing the tiles?
In most cases, yes. Doubling rafters, adding struts and fitting ties can all be done from inside the loft with the coverings in place. Tiles usually only come off where timber near the eaves is badly decayed, or the roof is being re-covered anyway.
More repairs we carry out in Southwark
- Lintel replacement
- Structural crack repairs
- Bowing wall repairs
- Extension pulling away repairs
- Boundary and garden wall repairs
Roof structure repairs near Southwark
Every rafter, purlin and tie on the job in Southwark is listed in the written quote, which becomes a fixed price in writing once the repair is specified.