Roof structure repairs in County Durham

Area: County Durham
Pricing region: North East
Ground: Clay in parts
Towns listed: 13

Is County Durham prone to ground movement?

Historic coal workings are recorded beneath parts of County Durham, and a coal mining search is worth checking where movement is unexplained. Across County Durham, most homes are colliery terraces, stone and brick villas in Durham and Darlington, and post-war council estates.

What to look for before calling about 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
Top of an outside wall leaning out at eaves level
Horizontal cracks in the wall just below the eaves or ceiling line

Roof structure repairs prices in County Durham

These are guide prices for County Durham, using North East rates and including VAT. Your written quote follows photos or a survey, and is fixed once the repair is specified.

Guide prices inc VAT on North East rates. Items marked est. are our estimates.
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

How we usually approach roof structure repairs

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

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

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

What happens during roof structure repairs, step by step?

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.
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.

Roof structure repairs: purlin and struts added, roof spread tied in. Indicative drawing, not to scale.

Do you need approval 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.

Find roof structure repairs in your County Durham town

Questions about roof structure repairs in County Durham

Why do houses in County Durham crack?

Much of County Durham sits on the Durham Coalfield, worked for centuries, often under a cover of glacial clay. Many former pit villages have recorded mine workings, and coal mining searches are standard for property here. Historic coal workings are recorded beneath parts of County Durham, and a coal mining search is worth checking where movement is unexplained. Only an investigation on site can say why a particular building has moved.

How much will roof structure repairs cost in County Durham?

On North East rates, roof structure repairs starts from about £275 per rafter, including VAT. The written price depends on the extent of the damage, access and whether an engineer or building control is needed.

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.

Is a sagging roof ridge dangerous?

A slight, even dip in an old roof is often historic movement that stopped long ago. A sag that is getting worse, cracking timbers, walls pushing out at the eaves or recently removed struts should be checked soon. Avoid storing heavy items in the loft until then.