Barry · South Glamorgan
Roof structure repairs in Barry
A dipping ridge or a wavy roof slope in Barry is usually a timber problem, not a tile problem. We look at the rafters, purlins, struts and ties from the loft, and at the wall heads from outside, before suggesting how to strengthen it.
Guide price from£275per rafter inc VAT

- Postcodes
- CF62, CF63
- Population
- about 55,000
- Area
- South Glamorgan
- Pricing region
- Wales
How do local ground conditions affect roof structure repairs in Barry?
Barry (CF62, CF63) has around 55,000 residents and sits in South Glamorgan. Nearby places we cover include Penarth (5 miles), Cardiff (7 miles) and Llantwit Major (9 miles).
Clay soils are found in parts of South Glamorgan. Ground movement here is more often linked to soils, drains and trees than to mining. Housing stock in South Glamorgan: Victorian terraces in Cardiff and Penarth, inter-war semis and post-war estates.
How much will roof structure repairs cost in Barry?
Guide prices below are for homes in Barry, on Wales rates and including VAT. A survey or good photos let us turn them into a fixed written price.
| 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 |
Which repair method suits a home in Barry?
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 happens when we carry out roof structure repairs in Barry?
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.
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.
Signs you may need roof structure repairs
- Roof slope looking hollow or wavy between the ridge and the gutter
- Struts, collars or ties cut out or missing in the loft
- Ridge line dipping in the middle when seen from the street
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.
Roof structure repairs in Barry: questions and answers
How much will roof structure repairs cost in Barry?
Guide prices for roof structure repairs in Barry 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 cover Barry?
Yes. We take enquiries from across Barry, including CF62, CF63, and from nearby places such as Penarth and Cardiff. Send photos for a free initial view and we will tell you what happens next.
Is the ground in South Glamorgan prone to subsidence?
Cardiff is built on Mercia Mudstone, river gravels and alluvium, and the Vale of Glamorgan on Lias limestone and clay. Soft alluvium near the rivers and docks can settle. Only an investigation can say why a particular building has moved.
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.
Do I need a structural engineer for roof repairs?
For like-for-like repairs to a few rafters, often not. Where purlins, struts or ties are being redesigned, the covering is getting heavier or the walls are being pushed out, you usually do. Where the repair needs an engineer’s design or sign-off, an independent chartered structural engineer is appointed, and we can arrange this.
Other structural repairs in Barry
- Structural surveys and crack monitoring
- Retaining wall repairs
- Wall tie replacement
- Brick arch repairs
- Subsidence repairs
Roof structure repairs near Barry
Seen the ridge dip at your Barry home? Photograph it from across the road, add a few loft shots, and we will tell you what it likely needs.