Concurrent delay in Quebec

This page states a recorded negative finding and then sets out the machinery that does its work. The finding is that there is no Quebec doctrine of concurrent delay. The machinery is fault, causation and apportionment, running on the general law of obligations rather than on anything in the construction chapter of the Code civil du Québec, for which see the Civil Code framework for delay in Quebec.

The practical consequence is not that Quebec is silent on overlapping delay. Quebec courts deal with overlapping delay constantly. It is that the vocabulary a common-law delay expert brings will not connect to anything a Quebec judge is looking for, and a submission built on dominant cause, on approximately equal causative potency, or on the English default that true concurrency yields time but not money, has no Quebec footing to stand on.

Is there a doctrine of concurrent delay in Quebec?

No. No Quebec authority, doctrine or professional commentary on « délais concomitants » or « retards concurrents » as a distinct doctrine was located. Searches in French and English returned only common-law and international material. This is a recorded negative finding, verified as an absence, and it should be stated in print rather than filled in with common-law reasoning.

The absence is well-attested rather than merely unfound. Global Arbitration Review's comparative survey of concurrency omits Quebec entirely. Miller Thomson's Canadian treatment of concurrency is Ontario-only. Revay's March 2025 delay-analysis bulletin cites no Canadian case at all. There is no Quebec judgment, no Quebec textbook chapter and no Quebec professional guidance that treats concurrency as a named question with a named answer.

This is not an absence of law. It is a different architecture. A Quebec judge will not ask which cause was dominant, or whether the delays were truly concurrent in the Malmaison sense. The judge will ask whose fault caused what, and in what proportion, and will then deduct days, or divide liability, accordingly. The five competing models set out in the neutral treatment of concurrent delay are worth reading precisely so that a Quebec reader can see which questions are not being asked here.

Two consequences follow immediately for anyone drafting a pleading or an expert report for a Quebec court. Do not plead "concurrent delay" as a doctrine. There is nothing for the court to apply. And do not assume the question is open and therefore arguable from first principles in the common-law manner. The general law of obligations already supplies an answer, and it is the answer the court will use.

What replaces the doctrine: apportionment of fault

Apportionment. Where two causes operate on the same period of overrun, a Quebec court deducts days from the owner's penalty count for periods it is satisfied were attributable to the owner or excusable, and apportions liability where responsibility is genuinely shared. The corpus supplies two worked outcomes: two-thirds owner liability in Ed Brunet, and 636 delay days reduced to 475 in Ville de Pointe-Claire.

Ed Brunet & Associés inc. c. Municipalité de La Pêche 2004 CanLII 46988 is the clearest reported instance of proportional division on a delay file. Liability was apportioned two-thirds to the owner. The $500 per day penal clause was applied as liquidated damages, and (a detail worth noticing) the engineer's fees were refused because the engineer had caused the delays. No concurrency analysis appears in the reporting of the case, because none was needed: the court divided responsibility and priced the division.

Ville de Pointe-Claire c. Asphalte Béton Carrières Rive-Nord inc. 2023 QCCA 1565 shows the deduction mechanism at the scale of a real municipal job. The reported facts are a March 2011 tender for a sewer collector worth more than $12.5M, phase-specific penalties of $1,500 to $2,500 per day, and a contractor that finished two months late and then sued for extras and withheld sums.

Layer: jurisdictional, and it rests entirely on secondary case commentary. The appellate authority is the Court of Appeal of Quebec, but no Quebec judgment was read in original text for this corpus. Treat the day counts and the money figure as single-source, and verify them on CanLII or SOQUIJ before using them in a submission.

That caveat is not decoration. Every Quebec case figure on this page rests on law-firm bulletins rather than on the judgment. CanLII, SOQUIJ, CAIJ and RIM were all inaccessible to the research for this corpus, and no Quebec judgment was read in original text. The Code articles are different: they are primary-verified against LégisQuébec in French and in the official English, and can be relied on as stated.

The numbers are still the most useful thing here, because they show the shape of the outcome. Quebec does not produce the binary result that a dominant-cause analysis produces, and it does not produce the Malmaison result of a full extension for the contractor. It produces a division (161 days off a 636-day claim, two-thirds of the liability on the owner) arrived at by asking, event by event, whose fault the period was.

The burden is the real divergence, and it runs against the contractor

Meeting the completion date in Quebec is an obligation de résultat. An obligation of result rather than of means. Per Ville de Pointe-Claire c. Asphalte Béton Carrières Rive-Nord inc. 2023 QCCA 1565, delay presumes contractor responsibility, and the contractor displaces the presumption only by positively proving force majeure or the owner's fault. Proving the absence of its own fault is not enough.

This is where a common-law practitioner will misprice a Quebec file. Under Henry Boot Construction (UK) Ltd v Malmaison Hotel (Manchester) Ltd (1999) 70 Con LR 32, an employer risk event that is an effective cause of approximately equal causative potency gives the contractor the full extension of time, and the concurrent contractor delay does not reduce it. In Quebec the same facts, unproved, default against the contractor.

Layer, jurisdictional on both sides. The Quebec side rests on secondary case commentary reporting Ville de Pointe-Claire, 2023 QCCA 1565, and no paragraph pinpoint is available. The English side rests on a first-instance decision in which the concurrency passage recorded an agreed position between the parties.

Common-law Canada does not close the gap either. Schindler Elevator Corporation v Walsh Construction Company of Canada 2021 ONSC 283 (the leading statement for the common-law provinces) treats delays as concurrent where delays to co-critical and co-controlling activities overlap, and applies a but-for test robustly and with common sense. That is a doctrine about when concurrency exists. Quebec has no such doctrine to trigger, because the question never reaches that form.

The evidential architecture in Quebec has a close analogue inside the construction chapter itself, and drawing it helps a common lawyer see that the burden allocation is deliberate rather than accidental. Art 2118 C.c.Q. creates a presumption of liability for loss of the work, and art 2119 C.c.Q. lists the only exculpatory proofs available to displace it. The delay position is built the same way: a presumption, and a closed set of things the contractor must affirmatively establish to escape it.

There is a posture point buried in this, and it is the one most often ignored. Ville de Pointe-Claire is reported as holding that contractors must affirmatively request extensions of time at the time, or prove causes beyond their control, rather than contest penalties after the event. A contractor that banks a concurrency argument for trial has, in Quebec, chosen the weaker of the two available postures.

Art 1478 C.c.Q.: the apportionment article, and why not to cite it as settled

The statutory hook practitioners reach for is art 1478 C.c.Q., which shares liability between several persons in proportion to the seriousness of each one's fault, and shares it likewise where the victim's own fault contributed to the injury. It should not be cited as though its application in contract were settled, because the article sits in the extracontractual chapter and art 1458 para 2 C.c.Q. forbids co-contractants opting into that regime.

Both halves of that position are true at once, and the honest statement carries both. In practice, Quebec courts apportion in contract regardless. The outcomes in the preceding section are apportionment outcomes on contractual claims. In theory, the textual route is awkward. Art 1458 para 2 C.c.Q. is the rule of non-cumul: neither party to a contract may elect to be governed by the extracontractual rules, and a contractor that expressly pleads art 1478 C.c.Q. against its own co-contractant invites the objection.

The workable pleading is therefore the one that does not depend on the article. Plead the owner's contractual fault under art 1458 C.c.Q., the causal link to the completion date, and the proportion, and treat art 1478 C.c.Q. as a source of the apportionment principle rather than as the operative provision. A court that divides liability on that pleading is doing what Quebec courts do. A court asked to apply art 1478 C.c.Q. directly between co-contractants is being asked a question the corpus records as unresolved.

One further article cuts across apportionment and it cuts against the contractor. Art 1479 C.c.Q. provides that a person liable to repair an injury does not answer for any aggravation of that injury which the victim could have avoided. A contractor that sat on an owner-caused delay, or that failed to re-sequence when re-sequencing was available, loses the avoidable portion, and that loss happens inside the apportionment exercise, not as a separate defence.

Causation runs on art 1607 C.c.Q. and burden on art 2803 C.c.Q., neither is a critical-path test

Causation in a Quebec delay claim runs on art 1607 C.c.Q., which confines damages to what is « une suite immédiate et directe » of the default, and the burden runs on art 2803 C.c.Q.. The party asserting a right must prove the facts supporting it. Neither provision is a critical-path test, and neither imports one.

What that means in practice is that the critical path is evidence, not a legal standard. A Quebec court is not asking whether an event consumed total float or extended the longest path. It is asking whether the delay to completion was an immediate and direct consequence of the fault alleged, and whether the party alleging it has proved that on the ordinary standard. Art 2804 C.c.Q. sets that standard at plain preponderance, more probable than not. No Quebec authority setting a heightened or specialised standard for schedule or critical-path proof was located.

The critical path still matters enormously, because it is usually the only way to demonstrate directness on a construction programme. But it enters the case as the expert's method of proving « une suite immédiate et directe », and it can be displaced by any other evidence that proves the same thing. That is a materially different posture from a jurisdiction where a delay is compensable if and only if it is shown to be critical.

Two drafting consequences follow. First, an expert report that opens by asserting a critical-path methodology and closes with a delay quantum has not, by itself, addressed art 1607 C.c.Q. or art 2803 C.c.Q.. It has to say, in terms, that the delay to the completion date is the immediate and direct consequence of the identified fault. Second, where directness can be shown without a full network analysis (a suspension order, a site not handed over, an approval withheld for a measurable number of days) it should be, because that route is shorter and less vulnerable.

The proof is item by item, and quantity proves nothing

A Quebec court proves mixed causation event by event, day by day, from the contemporaneous record. The sheer number of delaying events proves nothing. In the Compagnie de construction Édilbec litigation (a fixed-price arena expansion with a 310-day period, a four-month overrun and 156 change orders) testimony suggested only ten could have touched the critical path, and evidence was led on only three. The claim was dismissed.

Carry the citation problem with the proposition, because the corpus records it as unresolved. Two neutral citations circulate for this litigation: Ville de Montréal c. Compagnie de construction Édilbec inc. 2022 QCCA 1521, and Compagnie de construction Édilbec inc. c. Ville de Montréal, 2024 QCCS 1737. They appear to be two different proceedings with the party ordering reversed, and which is which was not resolved for this corpus. The 156-change-order finding is reported of the 2022 QCCA 1521 proceeding. Verify which proceeding decided what before citing either in a pleading.

The reported reasoning gives two failures worth separating. The contractor did not update the schedule as the change orders were issued, so their impact could not be measured after the event. And the burden was simply not discharged: the burden of showing that the change orders caused the prolongation of the works lay on the contractor. Neither failure is about concurrency. Both are about proof.

Set against that a second recorded negative finding that bears directly on any concurrency argument. No Quebec judgment names a delay-analysis methodology at all: no windows analysis, no time impact analysis, no as-planned versus as-built, no collapsed as-built, no impacted as-planned. Searches in French for « méthode d'analyse des retards » with tribunal and jugement, and for « chemin critique » with QCCS and QCCA, returned only consultancy explainers. None names Eichleay, Hudson or Emden either.

The consequence is worth stating flatly. A party cannot win a Quebec concurrency argument by naming an SCL method or an AACE recommended practice, because no Quebec court has engaged with that taxonomy. What Quebec courts engage with is the contemporaneous record, item by item.

The taxonomies are still useful as a framework for an expert's own thinking, and the neutral account of delay analysis methods sets them out. What they are not is authority. An expert who tells a Quebec court that a particular result follows because it is what a named recommended practice prescribes is offering the court something it has never used. An expert who shows the court the daily reports, the correspondence and the updated programmes is offering it the only thing the reported cases turn on, for which see the neutral treatment of records and evidence.

Where the owner's own conduct is in play

Where the owner's conduct is one of two operative causes of the overrun, Quebec supplies three functional substitutes for the prevention principle and they operate on the owner's claim rather than on the completion date: abuse of right under arts 6, 7 and 1375 C.c.Q., the discretionary fin de non-recevoir, a peremptory exception that paralyses an existing right of action, and ordinary fault-plus-causation apportionment. The completion date does not move. The owner's claim fails, in whole or in proportion.

Those three articles supply the framework, and art 7 C.c.Q. carries two independent standards: exercise of a right with intent to injure, and exercise in an excessive and unreasonable manner contrary to the requirements of good faith. The second is objective, requires no malice, and is the limb that operates in construction.

Constructions ConCreate ltée c. Procureure générale du Québec 2020 QCCA 570 is the leading construction application. The owner's refusal of a lane closure the contractor needed in order to work safely, and its inaction after the workplace safety regulator intervened, were held to be « un comportement déraisonnable et un abus de droit contractuel ». The contractual allocation of the traffic-lane risk to the contractor did not license the owner to obstruct, and the delay consequences shifted to the owner without any extension-of-time clause. No quantum should be stated for ConCreate: one firm reports $220,000 in damages for the 22-day delay, another a $430,000 penalty imposed by the ministry, and the conflict was not resolved for this corpus.

Ville de Québec c. Constructions BSL inc. 2022 QCCA 1682 is the companion authority on the penalty. Merely including a penal clause in the tender documents does not guarantee its enforceability. The owner need not prove the amount of its damage, because that is the clause's function, but the contractor may contest whether any prejudice exists at all. Where the owner's own fault was a significant cause of the delay, « la Ville ne pouvait certes pas ignorer sa propre faute au moment de réclamer la pénalité contractuelle ».

The fin de non-recevoir needs a caveat stated in print rather than glossed. The doctrine is squarely established in Quebec private law, Banque Nationale du Canada c. Soucisse [1981] 2 S.C.R. 339, where Beetz J recognised the discretionary species, resting on general principles of law and particularly good faith, and operating against a party whose blameworthy conduct created the dispute. But no Quebec judgment expressly using the words fin de non-recevoir in a construction delay context was located. The construction outcomes are functionally identical. The terminological link is an inference, and it should be presented as one rather than as a labelled line of cases.

Force majeure once you are already late, and how to plead the argument

Art 1600 para 2 C.c.Q., read with art 1693 C.c.Q., has no common-law analogue and it changes what a concurrency argument is worth. From the moment the debtor is in demeure (in default) it answers for any loss resulting from force majeure. A contractor that has burned its float and is already late when the storm arrives bears the loss anyway, and is materially worse off than the same contractor on time.

Arts 1600 and 1693 C.c.Q. do two different things and both matter. Art 1693 C.c.Q. releases a debtor whose obligation can no longer be performed by reason of superior force: its language is extinctive, « libéré », and no provision of the Code states that force majeure suspends an obligation or extends time. Art 1600 para 2 C.c.Q. then removes even that release from a debtor already in default.

Coffrage Alliance ltée c. Procureure générale du Québec 2018 QCCS 3782 is the illustration. On a 16-week bridge contract the contractor mobilised late and was already about ten days behind. Post-tropical cyclone Irene then produced exceptional rainfall and the river exceeded the designed cofferdam levels four times. The flooding was accepted as unforeseeable, and the claim failed anyway. The reported reasons combine three things: the contractor was already in default, a programme offering more manoeuvring room would have reduced the consequences of the flooding, engaging the prudence and diligence standard in art 2100 C.c.Q., and the contractual claim procedure had not been followed.

That is why "my delay was concurrent with a weather event" is a much weaker position in Quebec than elsewhere. In a jurisdiction with a concurrency doctrine, the contractor's own prior delay is an argument about whether concurrency exists at all. In Quebec it is a threshold that can extinguish the excusing event entirely, by operation of art 1600 para 2 C.c.Q., before any question of proportion arises.

The sequence for running a mixed-causation argument in Quebec follows from all of the above, and none of its steps involves the word "concurrent".

What decides these cases in Quebec is the contemporaneous record and a defensible apportionment. It is not a doctrinal label, and there is no doctrinal label available to be argued about. The rest of the Quebec delay material (the forms, the notice regime, the penalty rules and the authorities) is collected at the Quebec extension-of-time hub.

Sobre este material El contenido de la biblioteca es información general sobre la práctica de las reclamaciones de construcción, no asesoramiento jurídico. El derecho a reclamar, los plazos y el procedimiento se rigen por su propio contrato y por el derecho del lugar donde se ejecuta la obra. Revisado el 8 de agosto de 2026 · Informar de una corrección