Insights — 28 September 2026

What a parkade condition assessment should include

Most parkade coating tenders fail before the first bid arrives, because the document they are priced from never established what condition the parkade is actually in. Bidders are asked to price "membrane replacement" or "parkade coating" across a structure nobody has sounded, cored or even walked with a moisture meter, so each bidder fills the gaps with assumptions — and each set of assumptions is different. The spread in the prices that come back is not a spread in efficiency. It is a spread in guesses.

A condition assessment closes those gaps before the tender goes out. This article sets out what one should include, what each finding changes in the scope, and how the result turns a stack of incomparable numbers into a decision an owner or strata council can actually defend.

Why bids diverge

Three unknowns hide inside every unassessed tender

The first unknown is structural: which slabs are suspended and which sit on grade. That single distinction decides whether a level needs an elastomeric waterproofing membrane or a wear coating, and most multi-level parkades need both answers at once. We have covered why in detail in traffic membrane vs epoxy on a suspended slab — a tender that names one system for the whole structure has usually got at least one level wrong.

The second unknown is the condition of what is already there. An existing membrane that is bonded but worn is a recoat; a membrane that is debonded, blistered or failing at its upturns and terminations is a replacement; a slab that sounds hollow under a hammer is a concrete repair project wearing a coating problem as a disguise. Each of those is a different scope with a different price, and from standing height they can all look like the same tired grey floor.

The third unknown is water: where it enters, where it travels and where it leaves. Drains, slopes, joints and the details around them decide how long any new system lasts — the failure points we see most often are catalogued in why parkade membranes fail early, and almost none of them are in the middle of the field area. A tender that says nothing about drainage and detailing is silent on the part of the work that determines whether the membrane reaches its service life.

A tender without a condition assessment is not a price for the work. It is a price for each bidder's guess at the work.

The assessment itself

Six things the assessment should establish

The sequence below is how we approach a parkade before quoting, and it is consistent with general industry practice for parking structure evaluation. In Canada, the design and rehabilitation of parking structures is governed by CSA S413; where an engineer's assessment applies it, that standard and the engineer's report set the requirements, not the coating contractor's opinion.

Slab type, level by level
Confirm which slabs are suspended and which are on grade, from structural drawings where they exist and from the building itself where they do not. This is the finding every other decision hangs on, and it is the one a per-square-foot price quietly skips.
Visual survey, top and underside
Crack patterns, rust staining, efflorescence, ponding, previous patch repairs and the state of the existing coating — mapped, not just noted. Under a suspended slab, the ceiling of the level below is often the most honest witness: water staining and deposits on the underside show where the deck is leaking regardless of how the top surface looks.
Sounding for delamination
Hammer or chain-drag sounding across the deck finds the areas where concrete has delaminated over corroding reinforcement — hollow-sounding zones that look identical to sound slab. This is standard practice precisely because the defect is invisible; it is how a repair quantity becomes a measured number instead of a construction-phase surprise.
Moisture in the slab
Coating systems have moisture limits set by their manufacturers, and a slab that exceeds them needs a different primer, a different system or more drying time. What the test methods do and do not tell you is covered in what a concrete moisture test actually tells you — the short version is that skipping the test does not make the moisture go away, it makes it the coating's problem.
Drains, slopes, joints and details
Every drain flow-checked, low points and ponding noted, expansion joints and cove terminations inspected. Membranes rarely fail in the field area first; they fail at the details, so the assessment has to spend its time where the failures happen.
Existing coating adhesion
Where a coating is already down, the question is whether it is still bonded. That answer separates recoat from replace — and getting it wrong in the optimistic direction means paying for a new system installed over a failing one.

Where the survey finds signs of reinforcement corrosion, the assessment escalates: engineers commonly take cores and chloride samples to establish how far de-icing salt has penetrated and whether the concrete around the steel is already contaminated. The specific test regime is the engineer's call. What matters for the owner is that the answer changes the project's shape — from a coating scope to a repair-then-protect scope — and that this is far cheaper to learn before tender than after award.

Findings to scope

What each finding changes in the tender

An assessment is only worth commissioning if its findings actually reshape the tender documents. This is the mapping between what the survey turns up and what the scope should say.

Assessment findings and their consequence in the tender scope
Finding	What the tender should carry
Mixed suspended and on-grade levels	A split scope naming the waterproofing system for the suspended levels and the wear system for the grade slab — never one product for the whole structure
Hollow-sounding, delaminated areas	Measured repair areas plus a provisional quantity at a unit rate, so additional repair found at breakout is priced competitively in advance
Existing membrane bonded, wear coat gone	A recoat scope — surface preparation and new wear coats over the sound membrane, not a full replacement priced for removal
Membrane debonded or failing at upturns and joints	Replacement in the affected areas, with the detailing at drains, joints and terminations itemised rather than buried in the square-foot rate
Ponding and slow drains	Drainage remediation as its own line, addressed before or with the coating work — a new membrane under standing water is a warranty argument waiting to happen
Slab moisture beyond the proposed system's limit	A system or primer selected for the measured condition, named in the scope, with the manufacturer's datasheet governing

System selection, repair methods and moisture limits vary by manufacturer and by structure — the engineer's report and the specific product datasheets govern, not this table.

Notice what this does to the bids. Every bidder is now pricing the same repairs, the same details, the same systems on the same levels. The numbers that come back are comparable, the provisional rates cap the owner's exposure to surprises, and the cheap bid can no longer win by simply assuming the least work. This is why our own pricing is assessed rather than quoted blind per square foot — the systems we would be assessing against are set out in our coating systems library and on the parkade waterproofing page.

From assessment to tender

Phasing belongs in the tender too

One more thing the assessment should settle before anyone prices anything: how the work will be sequenced around a parkade that has to keep operating. Stall counts, traffic routes, which levels can close together, where the ramp sits in the sequence — these come out of the same site walk that maps the slab types, and they belong in the tender so every bidder phases the job the same way. On the parkades we coat, that phasing is planned before the work is priced, not improvised on site.

For strata councils, this is also where the paperwork chain joins up. The depreciation report tells you the parkade is due; the condition assessment tells you what it is due for; the tender turns that into comparable prices. The middle step is the one that gets skipped, and skipping it is how a council ends up choosing between three numbers that describe three different projects. How the depreciation report and the coating scope relate is covered in what your depreciation report says about your parkade.

If you are heading toward a parkade tender, the order of operations is the whole game: establish slab types and condition first, write the scope from the findings, then invite prices on that scope. That assessment is where we start every parkade conversation — it is why the estimate takes a site visit and not just an area figure. The systems themselves, and how they are installed on working parkades, are set out in our parkade waterproofing guide.

Questions we get asked

Condition assessment FAQs

Who should carry out a parkade condition assessment?

It depends on what the parkade is showing. Where the questions are about coating scope — is the existing membrane bonded, where has the wear coat gone, which levels need membrane and which need a wear coating — an experienced coatings contractor can map that as part of pricing the work. Where there is spalled concrete, rust staining, active leaking or exposed reinforcing steel, a structural engineer should be engaged, because the job now includes concrete repair and the engineer's assessment determines its extent. On many parkades the two work together: the engineer defines the repair scope, the contractor defines the coating scope, and the tender carries both.

Does the parkade have to close for an assessment?

No. An assessment is surveyed area by area, the same way the coating work itself is phased. Sections are taped off while they are being sounded and inspected and released as the survey moves on, so the parkade keeps operating. The only access worth planning ahead is to the spaces below a suspended slab — electrical rooms, storage lockers, the level beneath a ramp — because the underside often tells you more about water entry than the surface does.

We already have a depreciation report. Is that enough to tender from?

A depreciation report is a planning document. It tells a strata when major components are likely to need renewal and what to set aside, and it is the right trigger for starting a parkade project. It is not a scope document: it will not tell you which areas of membrane are debonded, where the slab is delaminated, how the drains are performing or what condition the joints are in. Tendering directly from a depreciation report means every bidder fills those gaps with their own assumptions. The report should start the process; the condition assessment should define it.

What happens if the assessment finds structural repair?

The repair comes first, and finding it before tender is the good outcome. Concrete repair discovered during an assessment goes into the tender as measured or provisional quantities with unit rates, so every bidder prices the same repairs and the owner can compare like with like. The same repair discovered after award arrives as a change order, priced without competition, on a project that has already started. The assessment does not create the repair — the repair was always there. It only decides whether you price it competitively or reactively.

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