Bangor · Gwynedd
Roof structure repairs in Bangor
Roof structure repairs in Bangor 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£275per rafter inc VAT
- Postcodes
- LL57, LL59
- Population
- about 18,000
- Area
- Gwynedd
- Pricing region
- Wales
Is Gwynedd prone to ground movement?
Bangor, Gwynedd: about 18,000 residents across postcode districts LL57, LL59. Nearby, we also cover Llangefni (8 miles), Caernarfon (9 miles) and Llandudno (14 miles).
Most of Gwynedd is on firmer ground than the clay belts of the south-east. Old metal-mine shafts and workings are recorded in places, so mining searches are routine for some properties. Typical buildings in Gwynedd: Slate and stone terraces, chapels and cottages, Victorian seaside houses and post-war estates.
Is it time for roof structure repairs? Common signs
- Ridge line dipping in the middle when seen from the street
- Horizontal cracks in the wall just below the eaves or ceiling line
- Top of an outside wall leaning out at eaves level
What should you budget for roof structure repairs in Bangor?
These are guide prices for Bangor, using Wales 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 | £275 – £550 | per rafter |
| Purlin and strut strengthening | £1,100 – £2,750 | per roof |
| Tying in roof spread (straps and ties)est. | £735 – £2,300 | per roof |
Repair options we may recommend
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
Purlin and strut strengthening
Undersized purlins are strengthened with extra timber or replaced, and new struts are taken down to a load-bearing wall. Where there is no suitable wall, an engineer designs the load path. Temporary props hold the roof while members are changed.
Best for: Sagging slopes, slim purlins and struts removed from the loft
What to expect when we carry out roof structure repairs
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.
Loft and outside survey
On site we check rafter sizes and spacing, purlins, struts, ties and wall plates, look for rot and past alterations, and measure any lean at the wall head. The covering is noted too, because its weight affects the repair.
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.
Rules for roof structure repairs in Wales
In Wales, the Welsh version of the Building Regulations applies. Underpinning and other work that alters or strengthens the structure needs building control approval and inspection; like-for-like repairs often do not. The Party Wall etc. Act 1996 applies to work on party walls and excavation close to a neighbour’s foundations.
Your roof structure repairs questions
What is the price of roof structure repairs in Bangor?
Guide prices for roof structure repairs in Bangor start from about £275 per rafter, including VAT, on Wales 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 Bangor?
Yes, Bangor is covered, along with postcode districts LL57, LL59. We also cover nearby Llangefni and Caernarfon.
Does the ground around Bangor cause cracking?
Gwynedd and Anglesey are mostly hard rock with glacial deposits, so clay shrinkage is uncommon. Historic slate quarrying and metal mining have left tips and workings in places. Only an investigation can say why a particular building has moved.
Can heavy concrete tiles damage a roof?
Yes, if the frame was designed for lighter slate or tiles and was not strengthened. The extra weight makes rafters and purlins sag and can bring on roof spread. Before re-roofing in a heavier material, have the structure checked and notify building control.
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 Bangor
- Resin injection ground stabilisation
- Structural surveys and crack monitoring
- Boundary and garden wall repairs
- Concrete repairs
- Lintel replacement
Roof structure repairs near Bangor
Every rafter, purlin and tie on the job in Bangor is listed in the written quote, which becomes a fixed price in writing once the repair is specified.