🔍 Why Brick Repointing in Montreal Is Essential
🧱 What Is Brick Repointing?
Brick repointing is the process of removing old, damaged mortar between bricks and replacing it with fresh mortar that matches the original in appearance, strength, and flexibility.
It’s not cosmetic. It’s structural preservation.
CMHC – Brick Wall Maintenance
Think of your wall like this:
Think of your wall like this:
- Bricks = your bones
- Mortar = your ligaments and joints
When joints break down, bones shift — same with bricks.
“Mortar in facing brickwork must not only bind bricks together but also repel water, accommodate movement, and allow breathability.”
— Brickwork for Apprentices, 6th Edition
— Brickwork for Apprentices, 6th Edition
⚠️ 9 Warning Signs You Need Brick Repointing
- Vertical or diagonal cracks in walls or near windows
- Crumbling or soft mortar (you can pick it out with a key)
- Loose bricks that wiggle or shift
- Water stains on interior walls or basement
- Efflorescence – white salt streaks on walls
- Spalling – bricks flaking or cracking on the surface
- Bowing walls – visual curves in your wall
- Moss or vegetation growing in joints
- Drafts or heat loss near brick sections
If you’re seeing 2+ of these, don’t wait. Costs double after winter.
🌨️ How Montreal’s Climate Wrecks Brick Walls
- Freeze-thaw cycles cause water inside mortar joints to expand and contract daily
- Salt from sidewalks or streets gets absorbed into bricks → efflorescence and internal damage
- Moisture from snow piles and ice dams causes bricks to become saturated → mold + rot
- Summer heat leads to expansion → stress on already weak joints
This is not the same as southern climates. Here in Montreal, we deal with hydraulic frost damage and wind-driven rain — the two biggest brick killers.
🧱 Historic Brick Homes in NDG & Westmount Need
Lime Mortar
Montreal has over 50,000 homes built before 1945, many of which use: Canada Historic Building Standards
- Soft red clay bricks
- Handmade or recycled bricks
- Lime-based mortar instead of modern cement
Using modern Portland cement on these bricks causes:
- Cracking (the cement is too hard, doesn’t flex)
- Water retention
- Destruction of bricks during seasonal expansion
“Mortar must be the sacrificial element. If the brick fails before the joint, you’ve chosen the wrong mix.”
— Brickwork for Apprentices
— Brickwork for Apprentices
If your home is in NDG, Westmount, Mile End, Verdun, or Plateau, you likely need Type N or Type O mortar, or a custom lime blend — not what big-box contractors use.
🛠️ Step-by-Step: How We Repoint Your Walls
1. Inspection & Diagnosis
We identify weak joints, loose bricks, previous patch jobs, and moisture paths. You’ll get a full breakdown, not a guess.
2. Joint Raking
We remove damaged mortar to a depth of ~20mm using dust-free grinders or hand tools (especially on heritage façades).
3. Cleaning & Prep
We blow out debris, brush, and wet the surface to ensure proper mortar adhesion.
4. Custom Mortar Mixing
We mix on-site — either Type N/O or lime mortar. Colors are matched by sample.
5. Repointing
Using the correct joint profile (concave, weathered, flush), we apply mortar and tool it professionally to shed water.
6. Curing
Mortar must stay moist for 48–72 hours. We mist and cover as needed to ensure slow, strong curing.
7. Final Clean
We use light acid wash or dry-brushing depending on brick age and finish.
✅ Bonus: Chimneys & Steps
Most chimney leaks are caused by failing mortar at the cap or flashing — we can repoint or rebuild on-site with same-day quotes.
🧪 Materials & Tools We Use (for Transparency)
- Tuck pointers, margin trowels, jointers
- HEPA vacuums (for dust compliance)
- Stainless steel or brass brushes
- Lime (hydrated or putty) + fine sand
- Type N, S, or O masonry cement
- Bonding agents for patch joins
- Water-repellent additives (for exterior-only work)
- Brick tinting kit for color matching
We NEVER use caulking, paint, or premix bags from big box stores.
🔎 The 3 Most Common Repointing Mistakes
- Wrong mortar type → Causes bricks to crack, absorb water, or explode in winter
- Bad tooling or joint finish → Leads to rapid water entry and moss growth
- Power washing afterward → Damages the brick face, ruins new mortar, voids your investment
💬 Common Questions (Local FAQ)
How much does repointing cost in Montreal?
➡️ $15–$40 per sq. ft. For larger walls or chimneys: $2,500–$8,000
How long does brick repointing take?
➡️ 1–3 days for small jobs. Full façades: 5–10 days depending on height and access.
Do I need a permit for brick repair?
➡️ Not usually. But for homes in Westmount or Plateau’s historic zone, we provide code-compliant reports and photos.
How often should I repoint my house?
➡️ Every 25–30 years with lime mortar, 30–40 years with modern cement mixes — if done right.
📍 Areas We Serve (Hyper-Local SEO List)
- NDG (Notre-Dame-de-Grâce)
- Westmount
- Côte-des-Neiges
- Verdun
- Montreal West
- Lasalle
- Lachine
- Saint-Henri
- Hampstead
- CSL (Côte-Saint-Luc)
- West Island: Pierrefonds, DDO, Kirkland, Pointe-Claire
💸 The Real Cost of Waiting…
| Condition | Fix Cost | Delay Cost |
|---|---|---|
| Joint cracks | $1,200 | $2,800 after winter |
| Chimney cracks | $2,400 | $4,500 + interior leak repair |
| Wall movement | $5,000–$8,000 | $10,000–$15,000 rebuild |
We’re not trying to scare you — we’re showing you the truth.
🛠️ Why Choose NDG Restoration & Painting?
✅ Montreal-based masons — not Ontario imports
✅ We don’t “patch and paint” — we restore
✅ Fully insured and bilingual
✅ 5-star Google rating
✅ References available in every borough
✅ Fast turnaround, clean work, no subcontractors
✅ We don’t “patch and paint” — we restore
✅ Fully insured and bilingual
✅ 5-star Google rating
✅ References available in every borough
✅ Fast turnaround, clean work, no subcontractors