Spring Mending-Time

What Robert Frost understood about construction contracts
Every spring, two neighbors walk a wall.

By Owen Newman

Hadrian’s Wall in Northumberland. A two-thousand-year-old UNESCO World Heritage Site with superb views and excellent walking.

Robert Frost popularized the now-famous phrase “Good Fences Make Good Neighbors” in his poem, Mending Wall, more than a century ago. The neighbors in his poem would meet each spring to walk together along the wall, each replacing the stones that have fallen on his side.

Frost’s speaker is skeptical and asks why the wall needs to exist at all: “He is all pine and I am apple orchard. My apple trees will never get across and eat the cones under his pines.” But the neighbor is unmoved. “Good fences make good neighbors.”

I have frequently used the Good Fences analogy in discussions about how well-developed contracts may improve or at least preserve owner/contractor relationships, and I am not abandoning the premise. But just as Frost’s poem is not really about the quality of the fence, the lesson here is not about the quality of the contract. It is about the ritual of maintaining it. Both neighbors show up. Both walk the fence. The wall gets mended not because one man decides it should be, but because both agree it is worth maintaining.

“Something there is that doesn’t love a wall,
That sends the frozen-ground-swell under it,
And spills the upper boulders in the sun;
And makes gaps even two can pass abreast.

No one has seen them made or heard them made,
But at spring mending-time we find them there.”

Most construction contracts are negotiated carefully, between sophisticated parties, and then filed away. The project mobilizes. The work begins. Owner and contractor go back to their corners, focus on their work, and assume the other side is doing the same.

This works fine. Until winter comes.

In construction, winter comes in many forms: change orders, delayed performance, and supply chain disruptions. None of these are truly unforeseen events. Anyone who has managed or advised on a large construction project knows that change orders will come, that schedules will slip, that conditions will differ from the drawings.

When spring comes, both parties reach for the contract. And what they usually find are the gaps that have formed. Notice provisions may have gone unobserved. Force majeure language may not account for tariff-driven material escalation. Prior schedule or productivity impacts may not have been substantiated. Project challenges like these, if left unaddressed, can leave gaps that undermine the contract’s ability to make “good neighbors.”

“And on a day we meet to walk the line
And set the wall between us once again.
We keep the wall between us as we go.
To each the boulders that have fallen to each.”

Frost’s mending ritual is not complicated. What makes it work is not the sophistication of the process — it is the discipline of showing up. Both neighbors. Together.

Maintaining a construction contract requires the same discipline.

In practice, that means regular, deliberate conversations between owner and contractor about where the project stands and whether they are meeting the contract’s requirements. It means treating the change order process as a shared obligation — documented as it happens — rather than an administrative nuisance. It means revisiting the contract together when circumstances change materially. And perhaps most importantly, it means having difficult conversations up front rather than waiting to see what happens down the line.

The parties who do this — who are diligent in maintaining the contractual relationship together — are far less likely to end up in a courtroom. Not because their projects are free of problems, but because they addressed the problems while they were still problems that could be resolved by neighborly cooperation rather than a legal battle.

“Why do they make good neighbors? Isn’t it
Where there are cows? But here there are no cows.
Before I built a wall I’d ask to know
What I was walling in or walling out,
And to whom I was like to give offense.
Something there is that doesn’t love a wall,
That wants it down.”

Frost’s speaker remained skeptical about the need for a wall and in part, worried about giving offense—perhaps about what the wall said about the relationship between neighbors. It is a reasonable concern. In construction, it frequently manifests as a reluctance to send formal notice, to document a change order while the relationship is still warm, or to insist on contract compliance when the other party is struggling. The instinct to avoid offense is understandable. The cost of acting on it is not.

Clients frequently lament that they avoided providing notice or addressing change as a gesture of good faith, believing both parties would “be fair to each other in the end.” But the paradox is this: the gesture intended to preserve the relationship and avoid offense is often what damages it. When a party withholds notice or stays silent about a developing problem, they are not protecting the partnership — they are building a private version of events that the other party knows nothing about. When spring comes, the relationship fails not because the change order was too large or the delay too long, but because one party knew something the other did not and said nothing. Trust is not preserved by avoiding difficult conversations. It is built by having them.

Good fences make good neighbors. Not because they signal distrust, but because they give both parties a shared structure for managing the inevitable winter events and avoiding the accumulation of gaps.

The best construction contracts work the same way. They are not statements of distrust. They are the shared understanding by which the parties can avoid or mitigate impacts as they occur. So long as both parties show up and walk the line together.

Owen Newman is a construction and energy litigator and international arbitration specialist at Duane Morris LLP in Chicago. Owen previously spent six years managing EPC projects and leading commercial operations for a global engineering and construction contractor—which is where he first learned to walk the line.

Duane Morris Attorneys Speaking at Construction Super Conference 2025

Duane Morris attorneys will be speaking on the following panels at the Construction Super Conference in Bonita Springs, Florida.

Blueprints for Evolving Compliance: Navigating DEI, FCA, OFCCP & Immigration Under the New Trump Administration
Wednesday, December 10, 2025 | 9:45 a.m. to 11:00 a.m.

Thomas Curran
Duane Morris LLP

Lorraine D’Angelo
LDA Compliance Consulting Inc.

 Managing Legal Risk Created by Strong Corporate Values
Wednesday, December 10, 2025 | 4:15 p.m. to 5:30 p.m.

Owen Newman
Duane Morris LLP

Jenn Shafer
DLR Group

Benjamin Strawn
Kiewit Corporation

Benton Wheatley
Duane Morris LLP

For more information or to register, please visit the Construction Super Conference website.

About the Duane Morris Construction Group

Duane Morris’ Construction Group is nationally ranked by Chambers USA among the leaders in the industry, with construction attorneys across the United States and around the world. The group’s lawyers provide a full range of legal services to clients in all aspects of construction and government contracting.

TCC Issues New Decision Addressing the Definition of Concurrent Delay

Concurrent delay occurs whenever two or more separate events – at least one of which is an employer risk event and at least one a contractor risk event – independently delay the critical path of a project.

The substantial majority of standard form construction and engineering contracts are silent as to either the definition of or apportionment of responsibility for concurrent delays, and it is generally rare for parties to seek to include language to that effect by way of bespoke amendment. This reluctance to legislate for concurrent delay in contracts probably reflects the inherent difficulty in formulating language that would adequately address what is always a complex and necessarily heavily fact-dependent issue.

Nevertheless, the consequence of this widespread lack of contractual language is that issues concerning concurrent delays are usually left to be determined by the law of the contract.

Traditionally, the cases raising concurrency in the Courts of England and Wales have concerned concurrent delays by a contractor that is claiming an extension of time against an Owner.  In the seminal case, Henry Boot Construction (UK) Ltd v Malmaison Hotel (Manchester) Ltd [1999] 70 Con. L.R. 32, the Court recognized that in such a situation the Contractor would be entitled to an extension of time but not to prolongation costs.

The determination of what is required for two delays to be concurrent under English law, however, has remained unclear.

The preferred approach, the “dominant cause approach”, assigns liability to whichever delay is the “effective, dominant cause” of the critical path impact. If there is such a dominant cause, the delays are not concurrent; concurrency occurs only when both delays are of “approximately equal causative potency.”  North Midland Building Ltd v Cyden Homes Ltd [2018] EWCA Civ 1744; H. Fairweather & Co Ltd v London Borough of Wandsworth [1987] 39 BLR 106 (OR).

A contrary line of cases, however, has resolved apparently concurrent delays based on a first-in-time approach under the reasoning that a subsequent concurrent delay does not actually effect the completion date of the Works: Royal Brompton Hospital NHS Trust v Frederick A Hammond & Ors [2000]. Under this approach, true concurrency would require that “both events in fact cause delay to the progress of the works and the delaying effect of the two events is felt at the same time.”  Id. Note that this approach does not require the events themselves to be concurrent, only the effects of those events.

This view has seemingly been dominant in recent years, having been adopted in Adyard Abu Dhabi v SD Marine Services [2011] EWHC 848 (Comm) (11 April 2011) and Saga Cruises BDF Ltd v Fincantieri SPA [2016] EWHC 1875 (Comm) (29 July 2016).

This approach has also been recommended in the Second Edition of the Society for Construction Law’s Delay and Disruption Protocol, but was condemned by Scotland’s courts as “unnecessarily restrictive and [an approach] which would militate against the achievement of its obvious purpose of enabling the architect, or other tribunal, to make a judgment on the basis of fairness and a common-sense view of causation.”   City Inn Ltd v Shepherd Construction Ltd [2007] CSOH 190 (30 Nov. 2007) – a judgment that was itself criticized in Walter Lilly & Co. Ltd v Mackay [2012] EWHC 1773.

The contrasting approaches adopted by the Courts in this regard undoubtedly reflect the fact that whilst the Courts recognize that this is an area that requires judicial guidance, it is also heavily fact-dependent, such that an approach adopted in one case may not be appropriate with a different set of facts.

Insofar as it is possible to establish overarching principles, they are likely to be those summarized in Saga Cruises v Fincantieri and drawn from Henry Boot v Malmaison:

  • Where an employer risk event actually causes a delay to completion, the contractor will always be entitled to an extension of time notwithstanding any concurrent contractor risk events. This is based in part on the principle that an employer cannot hold a contractor to an obligation that the employer himself has prevented the contractor achieving (the “prevention principle”).
  • The delay caused by an employer risk event must be actual, not notional or theoretical.
  • Where a contractor risk event has caused concurrent delay, the contractor’s claim for prolongation costs arising from the employer risk event is likely to fail for want of causation.
  • In cases of concurrency, the Courts (and therefore contract administrators) should be very cautious to attempt to apportion critical delay between two or more concurrent events.

Notwithstanding these principles, the treatment of concurrency remains uncertain, especially under international contracts where the law of England and Wales is being applied by an external tribunal or arbitrator.

It is thus noteworthy that last week the TCC rendered a decision addressing concurrent delays: Thomas Barnes & Sons PLC v Blackburn with Darwen Borough Council [2022] EWCH 2598 (TCC) (17 Oct. 2022).  The Borough Council for the borough of Blackburn with Darwen (“Blackburn”) contracted with Thomas Barnes to construct a bus terminal under the terms of a Joint Contracts Tribunal agreement.  The subsequent litigation stemmed from Blackburn’s denial of Barnes’ extension of time claims and termination of the Contract based on delays to the Works.

Barnes’ extension of time claim was based on structural steel defects (deflection under load) for which Barnes was not contractually responsible. Completion of the structural steel work was necessary to allow pouring of the concrete topping, which in turn was required for exterior wall construction and interior finishing thereafter.  While the structural steel delays were ongoing, Barnes independently suffered delays to its roof works, which were also a required prerequisite to interior finishing.  The roof delays, however, arose after the structural steel delays, and were resolved prior to the construction of the exterior walls, and therefore did not independently cause delay to the critical path.

The Court found that these roof delays, although subsumed entirely within the critical path impact of the structural steel delays, were concurrent, writing:

“In my judgment this is a case where these causes were concurrent over the period of delay caused by the roof coverings. That is because completion of the remedial works to the hub structural steelwork was essential to allow the concrete topping to be poured and the hub SFS to be installed, without which the hub finishes could not be meaningfully started, but completion of the roof coverings was also essential for the hub finishes to be meaningfully started as well. It is not enough for the claimant to say that the works to the roof coverings were irrelevant from a delay perspective because the specification and execution of the remedial works to the hub structural steelwork were continuing both before and after that period of delay.  Conversely, it is not enough for the defendant to say that the remedial works to the hub structural steelwork were irrelevant from a delay perspective because the roof coverings were on the critical path. The plain fact is that both of the work items were on the critical path as regards the hub finishes and both were causing delay over the same period.”

The Court held that Barnes was entitled to an extension of time based on the delay caused by the steel frame deflection, but was only entitled to prolongation damages for the periods of delay that were not concurrent with Barnes’ own delays to the roof works.

Even given the diversity of approaches taken by the Courts on concurrency this is a curious decision. On the facts as given in the judgment, it appears that the dominant cause of delay was the completion of remedial works to the hub structural steelwork, and that this is therefore not an instance of true concurrency. However, the Court does not discuss the dominance of these works, and it is possible that this issue was not raised in submissions before it. The Court also appears to have ascribed at least some significance to the parties’ contemporaneous evaluation of the critical path impacts of the two delays, a consideration that has not played a prevalent role in prior decisions addressing concurrent delays.

It is not currently known whether this decision will be appealed. Nevertheless, in the meantime this case only increases the uncertainty surrounding the definition of “concurrent delay” under the law of England and Wales.

For More Information

If you have any questions about this blog, the final guidance or its potential implication, please contact Vijay Bange, Chris Chasin, Owen Newman or Steve Nichol.

Construction Industry at Core of Post-COVID-19 Debates

By Owen Newman and Chris Chasin

Who is in the best position to sustain the loss? And what outcome is in the overall best interests of industry, economy and the public at-large? Governments will grapple with these issues in the context of COVID-19 in the months and years to come. And the construction industry, willing or not, will find itself at the core of these debates as it deals with COVID-19 related cost and schedule impacts caused by work stoppages, disruption of labor resources and productivity, disturbed supply chains and varied safety requirements. Continue reading “Construction Industry at Core of Post-COVID-19 Debates”

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The opinions expressed on this blog are those of the author and are not to be construed as legal advice.

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