7 Signs Your Home Has a Structural Problem

Most homes shift and settle a little over the years, and most of the cracks and creaks that come with it are harmless. The trick is knowing which ones aren't. As North Vancouver's structural-repair specialists, here are the seven signs we tell homeowners to take seriously — and what they usually mean.

1. Sloping or sagging floors

If a marble rolls across your floor on its own, or you can feel a dip walking through a room, something below has moved. Common causes are a settling foundation, a failing or undersized beam, rot in post-and-beam supports, or joists that have given way. A slope rarely corrects itself — it usually grows.

2. Cracks that run diagonally from doors and windows

Thin, vertical hairline cracks are usually just drywall settling. The ones to watch are diagonal cracks running from the corners of door and window frames, cracks wider than about 3 mm (1/8 inch), or any crack that keeps coming back after you patch it. Those suggest the structure around the opening is moving.

3. Doors and windows that stick or won't latch

When a door that always worked suddenly drags, won't close, or its latch no longer lines up, the frame around it has gone out of square — often because the floor or foundation beneath it has shifted. One sticky door in winter is normal; several around the house is a pattern worth checking.

4. Cracks in the foundation itself

In an unfinished basement or crawlspace, look at the concrete. Narrow vertical cracks are common and often minor. Horizontal cracks, stair-step cracks in block, or any crack you can fit a coin into are more serious — they can signal soil pressure or foundation movement and shouldn't wait.

5. Bowing, leaning, or bulging walls

A basement or retaining wall that bows inward, or an exterior wall that looks like it's leaning, is under pressure it wasn't designed for. On the North Shore's sloped lots, soil and water pressure against foundation walls is a frequent culprit.

6. Gaps where things should meet

Gaps opening up under baseboards, between walls and ceilings, or around window and door trim mean parts of the house are moving apart. So do gaps around an exterior chimney pulling away from the wall.

7. A bouncy, soft, or uneven floor

Floors that flex or bounce underfoot, soft spots, or a noticeable tilt point to weakened framing below — rot, undersized joists, or a beam that's no longer carrying its load. Common in older homes and anywhere there's been a moisture problem.

Cosmetic or structural? A quick rule of thumb

• Probably cosmetic: thin vertical hairlines, a single sticky door in humid weather, fine surface cracks that don't grow.
• Probably structural: diagonal cracks from openings, sloping or bouncy floors, multiple sticking doors, horizontal foundation cracks, bowing walls, or cracks that keep returning.
• The biggest red flag is change over time — anything that's clearly getting worse deserves a professional look.

Why North Shore homes are especially prone to this

North and West Vancouver are full of older homes on steep, sloped lots with original foundations — and our wet winters, moving soils, and seismic reality add loads that flat-lot, newer builds never feel. That combination is exactly why structural work is our specialty: it's the problem these neighbourhoods generate.

What to do if you spot the signs

Don't panic, and don't ignore it. Most structural issues are very fixable when caught early, and far cheaper to address before they spread into the finishes. The right next step is an honest, on-site assessment from someone who fixes the cause — not a salesperson upselling a repair you may not need.