Authored by: Rimkus Built Environment Solutions Marketing Team
A parkade slab can look sound while the reinforcing steel beneath it is already corroding. A parkade condition assessment is an engineer-led review of the concrete, reinforcing steel, waterproofing, joints, and drainage that protect a parking structure, using targeted testing such as chloride sampling and corrosion-potential mapping where conditions warrant it.
In Calgary, neither a Building Exterior Visual Assessment (BEVA) nor a reserve fund study automatically covers this level of investigation: Calgary’s Building Maintenance Bylaw excludes below-grade foundation walls and slabs, and Alberta reserve fund studies rely primarily on visual inspection.
Road salt tracked into parkades is a leading cause of this deterioration, and Canada Mortgage and Housing Corporation (CMHC) research identifies it as the main problem in Canadian parking structures.
This guide covers what an assessment tests for, how it differs from a BEVA or reserve fund study, and what deferring it tends to cost.
Key takeaways
Calgary condo boards and building owners may assume a Building Exterior Visual Assessment (BEVA) or a reserve fund study addresses the parking structure. Neither process necessarily includes parkade-specific concrete or reinforcement testing.
What BEVA and reserve fund studies cover
- Calgary’s BEVA bylaw applies to buildings five storeys or more above grade and covers exterior walls and roofs, excluding below-grade foundation walls and slabs
- Alberta reserve fund studies must be completed at least every five years and rely on on-site visual inspection plus records review
What a dedicated parkade assessment adds
- Concrete, reinforcing steel, waterproofing membranes, expansion joints, and drainage, reviewed by a qualified engineer
- Targeted testing, such as chloride sampling and corrosion mapping, scoped to the structure’s age, exposure, and findings
Rimkus Built Environment Solutions can evaluate parkade conditions for Calgary boards planning repairs or reserve contributions. Contact Us.
What a parkade assessment covers
A parkade condition assessment typically has two phases: a visual survey, followed by targeted testing where the survey findings warrant it.
The visual survey documents cracks, broken or hollow concrete, rust stains, wet spots, and the condition of joints and drains, which can help an engineer decide where testing is needed.
When the survey flags concerns, engineers can turn to methods that examine what the eye cannot see:
- Chloride sampling: engineers drill small powder samples at several depths to show how far de-icing salt has penetrated toward the steel
- Half-cell potential mapping: an electrical survey across the slab that identifies areas with a higher probability of active reinforcing-steel corrosion, typically interpreted alongside visual findings and chloride data
- Sounding: chain dragging or hammer sounding to identify hollow-sounding areas that can indicate delamination beneath an apparently intact surface
The assessment interval for a given parkade is set by a qualified engineer based on the structure’s age, exposure to de-icing salts, observed deterioration, and prior findings, rather than a single fixed schedule. A more frequent review may be appropriate where deterioration is active or exposure conditions are high-risk.
An engineer registered with the Association of Professional Engineers and Geoscientists of Alberta (APEGA) should perform this work.
The resulting report typically documents observed conditions, likely deterioration mechanisms, repair priorities, preliminary cost and risk context, and recommended follow-up.
The specific tests included depend on what the visual survey finds, rather than a fixed checklist applied to every parkade regardless of condition.
Why BEVA, reserve fund studies, and parkade assessments differ
| Review | Primary purpose | Typical method | Includes parkade diagnostics? |
|---|---|---|---|
| Calgary BEVA | Exterior-envelope maintenance compliance for qualifying buildings | Visual review of walls and roof | No; below-grade foundation walls and slabs are excluded |
| Alberta reserve fund study | Long-term capital planning for depreciating property | On-site visual inspection, records review, financial planning | Not necessarily; parkade-specific testing must be separately scoped |
| Parkade condition assessment | Diagnose condition and deterioration mechanisms in the parking structure | Visual review plus targeted engineering investigation where needed | Yes, when included in the engineering scope |
A board relying on a BEVA or reserve fund study alone may reasonably conclude a parkade is in acceptable condition without anyone having tested the concrete or the steel inside it.
A baseline property condition assessment conducted under American Society for Testing and Materials International (ASTM) E2018 follows a similar pattern. It’s built around a walk-through survey, document review, and interviews, and ASTM describes that baseline process as carrying “a moderate level of uncertainty.”
That doesn’t make a property condition assessment inadequate. It means a board should confirm whether an engagement includes parkade-specific testing before relying on it to assess chloride exposure or corrosion activity.
How Calgary’s climate may influence parkade deterioration
Calgary’s road-salt use varies materially by winter conditions: the City describes typical annual use as approximately 40,000 to 50,000 tonnes, while its annual report shows 59,884 tonnes in the 2022/23 season, 67,266 tonnes in 2023/24, and 39,950 tonnes in 2024/25.
As reinforcing steel corrodes, its corrosion products occupy more volume than the original steel. The resulting pressure can crack and delaminate the surrounding concrete, first as hidden internal separations before chunks eventually break away.
Chinook conditions and parkades
A Chinook is a warm, dry wind that descends the eastern slopes of the Rocky Mountains into southern Alberta, including Calgary, during winter months. As the wind crosses the mountains, it can produce rapid, large temperature swings within a single day, even in the middle of winter.
For a parkade, that pattern matters because it drives repeated freeze-thaw cycles. Snow and ice melt during a Chinook, and any water that reaches the concrete or reinforcing steel can refreeze once temperatures drop again. Repeated freezing and thawing can widen existing cracks and accelerate moisture and chloride movement into the concrete, compounding the corrosion risk already created by de-icing salt exposure.
Common signs of parkade deterioration
An engineer uses the location and pattern of visible damage to determine whether a condition appears limited to a protective system, such as a coating or joint, or may involve the underlying concrete and reinforcement. The distinction can materially change repair scope, cost, and urgency.
Concrete and reinforcement signs
Spalling, delamination (a slab that sounds hollow when struck despite looking intact), rust staining, cracking aligned with reinforcing bars, and exposed reinforcing steel generally indicate that steel damage is already underway. Fragments of concrete breaking away create an overhead hazard where they occur above parking stalls.
Water-management signs
Failed traffic coatings, blistering, ponding water, failed joint sealants, active leaks, and white crystalline deposits (efflorescence) can indicate that the barrier between de-icing salts and the structural slab is deteriorating. Water can travel some distance beneath a membrane, so a visible ceiling leak may sit far from the actual breach.
What these signs cannot establish
Visual symptoms guide where to investigate further, but they do not by themselves quantify chloride exposure, corrosion activity, or remaining structural capacity. That’s the gap targeted testing is designed to close.
Reserve fund studies and parkade condition
Alberta requires condominium corporations to obtain a reserve fund study at least every five years. The study includes an on-site visual inspection of depreciating property and a review of relevant records. Government guidance identifies accessible parkade membranes and sealants among the components that may fall within its scope, though this coverage is distinct from the parkade-specific testing described earlier in this guide.
Requirements for a reserve fund study vary across Canadian provinces beyond Alberta, covering different timing, scope, and preparer-qualification rules.
A reserve fund study can inform capital planning, but it is not automatically a corrosion investigation. If chloride ingress or reinforcing-steel corrosion is suspected, a board may need a separate engineering scope with targeted testing, since a five-year study cycle can leave a board planning contributions around a picture of the parkade that is several winters old.
The cost of deferring parkade assessments
Deferring parkade maintenance can turn coating-level repairs into structural rehabilitation, and in a condominium the shortfall may reach owners as a special levy. Deferred maintenance generally increases the likelihood that a relatively contained repair becomes a broader rehabilitation project.
The often-cited “Law of Fives,” originating from a 1984 paper by W.R. de Sitter, holds that a dollar spent on early maintenance can save roughly five dollars at the next phase, and twenty-five dollars two phases later if the problem is deferred further. It’s a useful illustration rather than a project-specific cost forecast, and boards should not use it as a budget estimate.
Patch repairs alone rarely stop the underlying process. Combining patching with waterproofing can meaningfully slow reinforcing-steel corrosion, but it does not eliminate the underlying chloride exposure that caused it.
This compounding cost curve applies to deferred maintenance across building systems generally, not just parkades.
Where reserve funds and current operating resources are insufficient for an unexpected repair, a condominium corporation may need to consider a special assessment or other funding option, subject to its governing documents and applicable requirements.
Where a parkade assessment fits into capital planning
A parkade condition assessment tests what a BEVA or reserve fund study alone typically does not: the concrete, reinforcing steel, and waterproofing that determine whether deterioration is still surface-level or already structural. Measured parkade data can help a board distinguish membrane maintenance from structural rehabilitation and align repair timing with reserve balances.
Combining this data with a broader condition assessment or reserve fund study can also reduce the number of separate site visits a board needs to schedule and budget for.
Rimkus’s Built Environment Solutions team evaluates parkade conditions using structural engineering and building envelope expertise. To discuss a parkade condition assessment in Calgary, contact us.
Frequently asked questions about parkade condition assessments in Calgary
How often should a board consider a parkade assessment?
There is no fixed municipal or provincial schedule specific to parkade structural assessments. A qualified engineer typically sets the interval based on the structure’s age, exposure to de-icing salts, observed deterioration, and prior findings.
Does a reserve fund study replace a parkade assessment?
A reserve fund study does not automatically replace a parkade assessment. It relies on visual inspection and records review, while chloride sampling, corrosion-potential mapping, and other diagnostic testing require a separate scope with a qualified engineer.
What should a board do if it finds spalling or exposed reinforcing steel?
Spalling and exposed steel indicate that corrosion damage is already underway, typically at a stage where surface observation alone can no longer establish its extent. An engineer can determine whether the damage is limited to isolated areas or points to broader deterioration requiring a fuller assessment.
This article is intended to provide general information and insights into prevailing industry practices. It is not intended to constitute, and should not be relied upon as, legal, technical, or professional advice. The content does not replace consultation with a qualified expert or professional regarding the specific facts and circumstances of any particular matter.