Brick arch repairs in Derry

Postcodes: BT48
Population: about 84,000
Area: County Londonderry
Pricing region: Northern Ireland

How do local ground conditions affect brick arch repairs in Derry?

Derry (BT48) has around 84,000 residents and sits in County Londonderry. If you are just outside Derry, we also cover Strabane (14 miles) and Limavady (15 miles).

Shrinkable clay is less common in County Londonderry than in south-east England. Ground movement here is more often linked to soils, drains and trees than to mining. What you mostly find across County Londonderry: Georgian and Victorian houses in Derry, brick terraces and post-war estates.

What to look for before calling about brick arch repairs

Cracks stepping out from the arch ends into the wall
Mortar falling out of the arch joints after frosty weather
A vertical crack running up from the middle of the arch

Brick arch repairs prices in Derry

These are guide prices for Derry, using Northern Ireland 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 Northern Ireland rates. Items marked est. are our estimates.
Item	Guide price	Per
Stitching and reinforcing a sound archest.	£350 – £1,050	per arch
Rebuilding an arch (one side)	£790 – £1,150	per opening
Rebuilding an arch (both sides)	£1,600 – £2,300	per opening

How we usually approach brick arch repairs

Rebuilding over a former

A timber former is cut to the arch profile and propped under the opening. The old arch is carefully taken down, bricks cleaned for reuse, and the arch rebuilt over the former with tight joints and a properly set keystone. The former stays until the mortar is strong enough to carry the load.

Best for: Badly dropped arches or ones with loose voussoirs

Lime mortar repairs

On older houses built in soft brick and lime, the arch is rebuilt or repointed in a lime mortar matched to the original. Lime lets moisture escape and moves slightly with the wall, so it protects the bricks rather than forcing damage into them, as hard cement mortar can.

Best for: Pre-1919 houses and soft historic brick

What happens during brick arch repairs, step by step?

Look at the arch closely
Straight-on photos of the arch and the wall either side show us how far it has dropped, whether the bricks are sound and whether the cause seems to be the arch itself or the wall around it.
Repair the arch
Bars are bonded into the joints above a sound arch, or the arch is taken down and relaid over the former using the original bricks where possible, with matched replacements for any that are damaged.
Strike the former and point
Once the mortar has cured enough, the former and props are removed. Joints are finished to match the surrounding wall, and any cracks running from the arch into the wall are repaired at the same visit.

Rules for brick arch repairs in Northern Ireland

In Northern Ireland, minor repairs usually need no approval, but structural work comes under the Building Regulations (Northern Ireland) 2012 and council building control. There is no Party Wall Act in Northern Ireland.

Questions about brick arch repairs in Derry

What is the price of brick arch repairs in Derry?

Guide prices for brick arch repairs in Derry start from about £350 per arch, including VAT, on Northern Ireland rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.

Do you carry out brick arch repairs in Derry?

We do. Derry and the surrounding area are covered, including nearby Strabane and Limavady. A free initial assessment from your photos is the first step.

Does the ground around Derry cause cracking?

County Londonderry has basalt, older hard rock and glacial deposits, with soft river ground along the Foyle and Bann. Only an investigation can say why a particular building has moved.

Is a dropped brick arch dangerous?

A slightly dropped arch is not usually an immediate danger, but it is no longer carrying load as it should and tends to worsen. Loose bricks that could fall, or a fast-growing crack above, need prompt attention. Do not rely on the window frame to hold it.

Do flat brick arches need a lintel?

Many flat soldier arches were built with a hidden steel bar or timber behind, because they have little true arch action. When repairing one, we check what is supporting it and, where needed, reinforce it with bars or add suitable support behind.

More repairs we carry out in Derry

Brick arch repairs near Derry

Once the brick and mortar match is agreed for your Derry arch, we put a fixed price in writing before any work is booked.