À quelle fréquence dois-je faire inspecter mes trous d'évacuation?
Reading time: 3'

How often should I get my weep holes inspected?

The Importance of Regular Weep Hole Inspections

The Role of Weep Holes in Masonry Structures

At Maçonnerie Montréal, we pride ourselves on delivering top-tier masonry services across Greater Montreal, Laval, Longueuil, South Shore, and North Shore. One of the most understated yet crucial components of masonry is the weep hole. These tiny openings, often overlooked, play a pivotal role in maintaining the health and longevity of brick walls by allowing accumulated moisture to escape, thereby preventing water damage and mold growth.

Why Regular Inspections are Essential

1. Preventing Moisture Build-up

  • Purpose of Weep Holes: Their primary function is to drain water that might penetrate the wall cavity, ensuring moisture doesn't remain trapped inside the wall.
  • Dangers of Blocked Weep Holes: When these holes become defective or blocked, water accumulates, leading to potential issues like mold growth, brick erosion, and even freeze-thaw damage in colder climates.

2. Ensuring Structural Integrity

  • Mortar Joint Erosion: Continuous exposure to water can erode mortar joints, which are essential for holding bricks together.
  • Brick Disintegration: Over time, the bricks themselves can start to disintegrate, weakening the wall's structure.
  • Foundation Threat: If water seeping through the bricks reaches the building's foundation, it can weaken it, posing a significant threat to the entire structure's stability.

How Often Should You Inspect?

1. Seasonal Checks

  • Before and After Winter: Especially before the onset of winter and after, ensure weep holes are free from obstructions and check for signs of damage or displacement.

2. After Severe Weather Events

  • Post-Storm: After significant rainfall or storms, it's wise to inspect weep holes for blockages or damage. This ensures that any accumulated moisture can escape and doesn't lead to long-term damage.

3. Routine Maintenance Checks

  • Annually: At a minimum, a yearly inspection is recommended. However, for older structures or those in particularly wet climates, bi-annual checks might be more appropriate.

Professional Consultation and Repairs

1. Expert Advice

  • Signs of Significant Change: If you notice significant changes in the size or position of weep holes, or if there's visible damage to the surrounding masonry, it's essential to consult masonry professionals. At Maçonnerie Montréal, our team is always ready to provide tailored advice and solutions.

2. Timely Repairs and Maintenance

  • Prompt Interventions: Addressing weep hole defects promptly can prevent more extensive damage to the building structure. This might involve cleaning, repairing, or even redesigning weep holes to ensure optimal performance.


While the size of weep holes might suggest their insignificance, their role in preserving the structural integrity of masonry buildings is monumental. Recognizing the potential threats posed by defective weep holes and taking proactive measures can save building owners from costly repairs and structural hazards. Trust Maçonnerie Montréal's expertise to guide you every step of the way, ensuring your masonry structures stand the test of time.