The Deterioration Most Homeowners Walk Past Every Day
Picture a homeowner in Kitchener who has lived in their brick home for twelve years. They walk past the front exterior every day. They notice the garden, the driveway, the gutters. What they don't notice is that three courses of mortar joints on the north face have recessed past the point where winter freeze-thaw cycles will begin forcing water into the wall. By the time they notice the interior damage two winters later, what was a repointing job has become a brick replacement project.
For homeowners across Kitchener, Cambridge, Guelph, Stratford, and Southwestern Ontario, brick deterioration is gradual and easy to miss in the early stages, when intervention is simple and cost-effective. The same conditions, caught a few seasons later, may require significantly more work. Matthew Howe has spent 17 years walking around the outsides of Ontario homes spotting the early signs that most homeowners walk past without noticing. The checklist below is what Matthew looks for during a property assessment, simplified for homeowners doing their own annual inspection.
"Most of the significant brick repairs I see could have been a straightforward repointing job if the homeowner had caught it two or three seasons earlier. The brick itself is usually fine. It's the window of easy intervention that closes." - Matthew Howe, Stone Haven
Mortar Joint Condition
The mortar joints are the first place to look and the most common early warning indicator on any Ontario brick exterior. Healthy mortar joints are flush with or slightly recessed from the brick face, solid when pressed with a finger or key, and free of visible cracking or powdering.
Signs of mortar joint deterioration to look for:
- Joints recessed more than 5 mm from the brick face, visible as a shadow line running along the courses
- Mortar that crumbles or powders when pressed with a finger or the edge of a key
- Cracks running along one or more joints in a consistent line rather than isolated to a single point
- Any joint that has opened completely and shows visible daylight or a dark void behind it
Early mortar joint deterioration is repointing territory: a relatively straightforward repair that Stone Haven can typically quote and complete within a few days. Left through two or three more Ontario winters, the same deterioration will allow enough water infiltration to damage the brick itself, at which point the scope and cost of repair increases substantially. Masonry Audit Property Inspection Stone Haven covers what a professional audit includes and why it provides more value than a visual-only assessment.
Brick Face Condition
The brick face itself should be smooth and intact across the full surface. Any variation from that baseline warrants closer attention.
What to look for on the brick face:
- Spalling: The outer face of the brick has broken away to reveal the softer, more porous interior beneath, leaving a rough or concave surface where the face was once smooth
- Surface crumbling: Brick faces that are granular or rough where they were previously smooth, indicating that the outer fired layer has begun to break down
- Brick bulge or bowing: Bricks that appear to push outward from the wall slightly, indicating that water or mortar movement behind the brick is displacing it from behind
Individual brick movement: Any brick that moves when pressed firmly is a condition requiring immediate professional attention regardless of how minor the movement appears
Brick spalling and bowing are often caused by incorrect mortar specification in a previous repair, where a harder mortar was used than the brick can accommodate. This is a recoverable condition if addressed before the spalling progresses too far into the brick body. Get Reliable Results with Expert Masonry covers what a quality repair process looks like for spalled and damaged brick.
Efflorescence and Staining
White powdery deposits on the brick surface, called efflorescence, are caused by water-soluble salts being drawn to the surface as moisture moves through the masonry and evaporates. Not all efflorescence is equally concerning:
- Light or occasional efflorescence on weather-exposed brick is relatively normal and primarily cosmetic
- Heavy or recurrent efflorescence indicates that significant water is moving through the masonry and that the entry point should be identified and sealed before further deterioration occurs
- Rust staining often indicates corroding metal lintels or wall ties within the wall assembly, which can eventually compromise structural integrity
- Dark or biological staining in localized areas indicates persistently damp conditions that are promoting growth and need to be investigated for source
Foundation and Parging Condition
The base of the brick wall where it meets the foundation is an important and frequently overlooked part of any brick exterior assessment. Two specific conditions to check:
- Parging condition: Parging that is crumbling, hollow-sounding when tapped, or has sections missing exposes the foundation to moisture infiltration that will eventually affect the brickwork above. Run your hand along the parging surface and tap it at intervals to check for hollow sections beneath an intact surface.
- Drainage pattern: Water that pools or drains consistently against the base of the wall rather than away from it will accelerate deterioration at the base courses of brick. This is often the area most affected on older Southwestern Ontario homes and the one most directly addressable through grading and drainage correction.
Frequently Asked Questions
Q: What are the signs that brick on an Ontario home needs professional restoration?
Key warning signs include recessed or crumbling mortar joints, spalling or crumbling brick faces, brick bulge or movement when pressed, heavy or recurrent efflorescence, crumbling parging at the foundation base, and any visible water infiltration around windows, doors, or at the roofline where it contacts the masonry. Stone Haven provides free masonry audits with photographic documentation for homeowners across Southwestern Ontario.
Q: How often should homeowners inspect their brick exterior in Ontario?
Ontario homeowners should do a visual inspection of their brick exterior at least once a year, ideally in spring after the freeze-thaw season when any new damage from winter cycling will be visible. A professional assessment every three to five years provides deeper evaluation of mortar joint condition, brick integrity, and any developing issues that are not obvious from ground level. Stone Haven offers free professional assessments for Southwestern Ontario homeowners.
Q: Is it safe to pressure wash brick to inspect or clean it?
Pressure washing should be used with caution on older brick. High-pressure washing can remove mortar from deteriorating joints, force water into the masonry, and damage softer historical brick faces. If cleaning is needed for inspection purposes, low-pressure rinsing or hand scrubbing is safer. Matthew always assesses the brick and mortar condition before recommending any cleaning method for older Southwestern Ontario homes.
Noticed any of these warning signs on your home? Book a masonry assessment with Stone Haven and receive a free documented condition report with photographs. Explore all masonry services at Stone Haven today.
