Wall Crack Repair? We'll Check the Cause Before Filling It in West Bromwich

A crack in a wall is information. The width, direction, depth and location all tell a story, and the right repair depends on reading that story before reaching for filler. Most small wall cracks are harmless shrinkage or seasonal movement; a smaller number signal structural movement and need an engineer's assessment. This page explains the difference, how we assess a crack, and what the repair involves when it is safe to proceed.

Cosmetic cracks and movement cracks

Cosmetic cracks are usually fine, shallow and stable. They run randomly across render or plaster, or follow the joint between two materials, and often open slightly in dry weather then close again when the wall absorbs moisture. They are caused by ordinary drying and seasonal movement, not a failing building. Their repair is straightforward and worthwhile: it keeps water out, restores the appearance, and stops frost enlarging a small flaw.

Cracks that deserve an engineer's attention are different. They are wider than a few millimetres, taper from thick to thin, run diagonally from window or door openings, step through mortar joints in the brickwork, appear on both sides of the wall at the same position, or grow noticeably over time. They may come with sticking doors, sloping floors or a bowing wall. Those patterns suggest the structure has moved, and the responsible next step is a structural engineer — not us filling the crack and hoping.

How we assess before repairing

We look at every crack on the affected area, measuring width and noting direction, length, depth and material. We check whether it is only in the render or passes through the brickwork, and compare with the inside face where accessible. We look for the causes: failed gutters, poor drainage, trees close to the wall, a raised path bridging the damp course. We ask how long it has been there and whether it changes with seasons. That history often resolves uncertainty better than a single photograph.

If the crack looks cosmetic and stable, we explain the repair and quote it. If it looks like movement, we make the area safe, document what we find, and refer you to a structural engineer. Where uncertainty remains, monitoring with a simple gauge over several months gives a reliable answer before a cosmetic patch is committed.

The repair

Fine cracks in render are raked out to a clean edge, dusted and filled with a flexible exterior filler or compatible repair mortar, then textured to match the surrounding finish. Cracked mortar joints are raked out to a suitable depth and repointed with mortar chosen for the wall's age and type — lime mortar for many older solid walls, not hard cement. Wider stable cracks in render may need mesh reinforcement across the repair to spread movement and reduce re-cracking. The repair is finished to blend with the existing wall, with the understanding that new material may look slightly different from weathered surfaces.

Weather, limits and aftercare

The work needs dry weather and frost-free curing, so we schedule around conditions and tell you if the forecast means delaying. No crack repair can guarantee that a moving building will never crack again; stable cracks can reopen seasonally, and we will explain that honestly. After repair, inspect the area each spring and tell us if it widens or changes — a changed pattern matters more than an old stable line.

Keep gutters in order so water doesn't attack the same area, and trim vegetation so the wall dries properly.

Booking your visit

Book through maintenance-men.com or by phone. You pay a booking fee when you book, and labour is charged hourly at a rate that depends on how soon you need the visit. The full cost is quoted and approved before work starts, with parts and materials quoted separately. Tell us the crack's location, approximate width and age, and send a photo if you can — it helps us arrive prepared.