Mortar Crumbling Between Bricks
Powdery, sandy, or missing mortar between your bricks? Learn why mortar joints fail in Saskatchewan, what tuckpointing involves, and why wrong mortar makes damage worse.
What's happening
The Problem
Mortar is designed to be the sacrificial layer between bricks — it's meant to fail before the brick does, because mortar is far easier to replace than brick. But once mortar loses its binding strength, your wall stops being weathertight. Water gets in, freeze-thaw takes over, and what starts as crumbling mortar becomes cracked brick, spalling brick, and interior moisture damage within a few winters. This is the exact moment when tuckpointing is the smart intervention.
Local context
Why This Shows Up on Regina Homes
The brick homes that dominate Lakeview, Dieppe Place, Whitmore Park, and inner-city Regina were built between the 1950s and 1990s using mortars with a 40–60 year functional lifespan in a Prairie climate. Most of them are now at or past that point. Combined with 60–80 freeze-thaw cycles per year and Saskatchewan wind-driven precipitation, mortar joint failure is now widespread across the older Regina housing stock.
What to look for
Warning Signs
- Mortar that feels sandy or powdery when you rub a finger across it
- Mortar you can scrape out with a coin or fingernail
- Joints recessed more than 6mm (¼ inch) back from the brick face
- Visible gaps between bricks
- Loose bricks that wobble under hand pressure
- White efflorescence blooming on the brick face
- Mortar dust or grit collecting at the base of the wall
- Interior damp spots or musty smells on the inside of an exterior brick wall
Root causes
Why It Happens
Age (past functional lifespan)
Portland cement mortars from the 1960s–80s have a 40–60 year functional lifespan in a cold climate. Past that, deterioration accelerates rapidly.
Freeze-Thaw Cycling
Water penetrates hairline cracks in the mortar, freezes, expands 9%, pries the joint wider. Every one of Regina's 60+ annual cycles compounds the damage.
Wrong Mortar from a Previous "Repair"
Modern hard Portland cement mortar on soft heritage brick makes the mortar stronger than the brick — thermal movement then cracks the brick face instead of the mortar. This is one of the most damaging things a bad contractor can do to an older brick home.
Water Management Failures
Missing drip caps, blocked weep holes, poor flashing above lintels — water sluices down the wall and pools in the joints. Joints wetter than they should be deteriorate much faster.
Chimney Exposure
Chimney joints deteriorate 2–3× faster than wall joints (exposed on all four sides, above the roof, no shelter). Chimney mortar failure often shows up before wall mortar failure on the same house.
How we fix it
The Repair Process
Professional tuckpointing: grind out failed mortar to a minimum depth of ¾ inch (never skim over the surface), pack in fresh matched mortar in two lifts, tool the joint to match the original profile, and keep it damp for 24–72 hours to cure slowly. Mortar matching — hardness, colour, aggregate — is what separates tuckpointing that lasts 30 years from tuckpointing that fails in 3. See our full <a href="/blog/what-is-tuckpointing">what is tuckpointing guide</a> for the process.
If you can scrape mortar out with a coin, if joints are recessed more than 6mm, or you see loose bricks or interior moisture, book before next winter. Left another season, tuckpointing turns into tuckpointing + brick replacement — a much larger and more expensive project.
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Book Free Assessment →Common questions
Frequently Asked
How can I tell if my mortar is actually failing vs just weathered?
Run a coin or fingernail across the mortar joint. If it scrapes away as powder or sand, it's failing — the binding cement matrix is gone. Weathered but sound mortar stays put under a coin.
How long does tuckpointing last?
Professional tuckpointing with properly matched mortar and ¾-inch prep depth lasts 20–30 years in Regina. Bad tuckpointing (wrong mortar, skim-coated over the surface) can fail in a few seasons.
Can I tuckpoint my own brick house?
Small isolated areas of soft mortar on ground-level walls are potentially a DIY project. Chimneys, second-storey work, heritage homes, or widespread failure should go to a professional — wrong mortar hardness is the main way DIY tuckpointing damages a wall long-term.
Why is mortar matching so important?
Modern hard Portland mortars on soft heritage brick cause the brick face to spall (the mortar becomes stronger than the brick). Matching hardness to the original brick preserves the sacrificial-mortar principle that keeps the wall weathertight.
What does tuckpointing cost?
Varies with height access, joint condition, mortar match complexity, and total joint area. Chimneys and second-storey work cost more than ground-level walls. Free written estimates give exact scope.
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