Your home’s foundation is one of the most critical elements of its structural integrity. Unfortunately, foundation issues often go unnoticed until they become major—and expensive—problems. Knowing the warning signs can help you catch issues early and save your home from costly damage.

Here are 10 common signs that may indicate your home has foundation problems:

1. Cracks in Walls and Ceilings

Hairline cracks may be normal due to settling, but large, jagged, or horizontal cracks—especially around windows, doors, or where walls meet ceilings—can signal a shifting foundation. Cracks wider than 1/4 inch should be professionally assessed.

2. Uneven or Sloping Floors

If you notice your floors aren’t level, it could be a sign of foundation movement. Sloping or bouncy floors can indicate that the foundation has shifted or that support beams are compromised.

3. Sticking Doors and Windows

Doors and windows that suddenly become difficult to open or close may be more than a seasonal issue. Shifting foundations can distort frames, making them misaligned or warped.

4. Gaps Around Window and Door Frames

Noticeable gaps around windows, doors, or even between walls and ceilings could indicate that your foundation is settling unevenly. This can lead to drafts, pest entry, and structural instability.

5. Cracks in the Foundation or Exterior Walls

Visible cracks in the exterior brick, concrete, or foundation slab are red flags. Vertical cracks may be less severe, but horizontal or stair-step cracks often point to serious foundation pressure or movement.

6. Bowing or Bulging Walls

If interior or basement walls are curving inward, this could indicate pressure from water-saturated soil around your home. This is a serious issue that should be addressed immediately to avoid collapse.

7. Water in the Basement or Crawl Space

Moisture or pooling water in these areas can weaken the foundation over time. It may also be a sign that your drainage system or foundation waterproofing has failed.

8. Separation of Cabinets or Counters from Walls

When built-ins like cabinets or countertops begin pulling away from the walls, it’s often a sign of foundation settling that’s shifting the structure of the house.

9. Sagging or Warped Rooflines

A roof that begins to sag or look uneven could be reacting to changes in the foundation. Since everything in a home is interconnected, foundation issues can cause structural stress all the way to the top.

10. Mold or Mildew in Unusual Areas

Persistent moisture from foundation cracks or basement leaks can lead to mold or mildew growth, especially in places you wouldn’t expect—like baseboards or behind walls.

What Should You Do If You Notice These Signs?

If you’re noticing any of these signs in your home, it’s time to act. Early detection is crucial. A professional foundation inspection can help determine the severity of the issue and recommend the best solution.

Marco Réparation de Fondation specializes in expert foundation repair services, waterproofing, French drains, crack repair, and excavation across Montreal and surrounding areas. Don’t wait—protect your home and your peace of mind today.