Five early signs your building needs assessment

Most structural failures I am called to never arrive without warning. Buildings speak — in cracks, in doors that suddenly stick, in stains that creep a little further every winter. After twenty-five years of reading those signs, here are the five I tell every owner to watch for.

1. Cracks that keep growing

A hairline shrinkage crack in a new slab is normal. A stepped crack through mortar joints that widens year on year is not. My rule of thumb: mark each end of the crack with dated pencil lines and a photo. If it moves more than a millimetre or two in a season, get it assessed — that movement is the structure telling you loads have found a new path.

2. Doors and windows that stick

When frames rack out of square, sashes jam. One sticky door after a wet winter can be swelling timber; every door on one side of the house sticking at once usually means differential settlement or a failing lintel. I check these with a level and a straightedge before I open a single calculation.

3. Water stains and persistent damp

Water is the enemy of every material I work with — it corrodes steel, rots timber and bursts masonry in freeze-thaw cycles. A stain on a soffit or a damp patch at a wall base is rarely just cosmetic; it marks where the structure is being quietly attacked. Trace the source before you repaint.

4. Sloping or springy floors

Set a marble down and watch it roll, or feel a floor bounce underfoot, and you are feeling excessive deflection or settlement. In timber floors it often means undersized or decayed joists; in concrete, it can signal overloading or support movement. Either way, it deserves measurement, not guesswork.

5. A building past its last check

Many commercial buildings I assess have not had a structural review in decades — sometimes since construction. Codes, loadings and surrounding ground conditions all change. If your building is older than twenty years and has never been properly assessed, a screening visit is cheap insurance.

Spotted one of these? Send me photos and the building’s age — I will tell you honestly whether you need a full assessment or just a watching brief.