As a builder, I see a house as a living, breathing thing. It moves, it settles, and it reacts to the weather. However, there’s a big difference between a house “settling” and a house “failing.” I want to empower you to know the difference, because in the world of construction, a £500 fix today can easily become a £15,000 nightmare next year.
Cracks: When to Worry
Not all cracks are created equal. Hairline fractures in plaster are usually just the result of seasonal expansion or new plaster drying out. But I want you to look for the “Step Crack.” If you see a crack in your external brickwork that follows the mortar lines like a staircase, that’s a red flag. It often suggests subsidence—where the ground beneath your home is moving.
I also tell clients to look at the width. If you can fit a 50p piece into a crack, or if it’s wider at the top than the bottom, don’t wait. It could be a failing lintel over a window or a foundation issue. I’ve seen homeowners try to “point over” these cracks with fresh mortar. Don’t do that. It’s like putting a plaster on a broken leg; you’re just hiding the symptom while the bone stays broken.
The “Sticking” Mystery
If you suddenly find that your front door is rubbing against the frame, or a bedroom door that used to swing freely now sticks at the top corner, don’t just plane the door down. Doors and windows are the “litmus test” for a building’s squareness. If the frame is distorting, it’s because the wall it’s sitting in is moving. It could be something as simple as a leaking underground drain softening the soil, or something more complex.
Bouncy Floors and Soft Timber
If you walk across your living room and the sideboard rattles, or the floor feels “springy,” we need to look under the floorboards. In many local properties, timber joists sit directly on or near the damp earth. Over decades, “wet rot” or “dry rot” can set in. If a joist loses its structural integrity, the floor becomes dangerous.
I’ve pulled up carpets to find joists that look like honeycomb because of woodworm. Early treatment is simple and effective; waiting until a leg of the sofa goes through the floor is a much different story.
Roof Lines and Chimneys
Next time you’re pulling into your driveway, take a moment to look at your roofline. Does the ridge of the roof look straight, or does it dip in the middle? A “sagging” roof often means the internal timbers (purlins) are under too much stress—perhaps because original slate was replaced with much heavier concrete tiles decades ago without reinforcing the structure.
My goal isn’t to scare you, but to make sure you’re informed. If you spot any of these red flags, I can provide a professional, honest assessment. Most things are fixable, but timing is everything.
