John Kenney, CPRC, CEO, Cotney Consulting Group - April 2026
Roofing projects rarely collapse dramatically. They slip. Profit does not usually disappear in a single catastrophic moment. It erodes quietly: a few extra labor hours here, a sequencing adjustment there, a minor clarification that never quite gets resolved. By the time someone recognizes that the job is off track, the margin has already thinned and recovery options are limited.
Most contractors assume that if the installation quality is solid and the crew works hard, the job will be fine. That assumption overlooks where the slippage begins on many projects. The trouble often starts in the space between what was estimated and what is actually executed in the field. It is not a dramatic failure of competence. It is a gap and when that gap is not managed carefully, it widens.
Estimating is built on assumptions. Every takeoff, production rate, labor factor and contingency allowance reflects a professional judgment about how the job should unfold. In the office, those assumptions are reasonable. They are built on experience, cost history and similar projects. But once the crew mobilizes, real-world conditions immediately test those assumptions. Access is tighter than expected. Existing conditions vary from the drawings. Weather windows compress. Other trades shift the schedule. The production rate that looked achievable on paper suddenly becomes overly optimistic.
The problem is not that the estimate was careless. The problem is that assumptions are rarely stress tested once the job begins. Too often, the estimate becomes a static document while the project environment remains dynamic. When field conditions shift, production expectations do not and slippage begins. Another common source of slippage is a lack of clarity in scope. Estimators believe they have clearly defined what is included and field leaders believe they understand what was sold, yet subtle gaps often remain. Clarifications discussed verbally during bid review may never make it into the job packet. Special conditions might be mentioned in passing but not documented thoroughly. When those gray areas arise during installation, the field must decide. Sometimes that decision favors the schedule and sometimes it favors customer satisfaction but rarely does it favor the margin.
This is not a communication failure in the dramatic sense. It is usually a small omission. But small omissions compound. When the field installs more than estimated without a formal change order documentation, profit quietly absorbs the difference. When a detail is done a certain way because “that is how we normally do it,” even though it was not included in the scope, the budget takes the hit. No single event appears significant but, collectively, they are.
Project managers often find themselves reacting to slippage instead of preventing it. They carry a heavy load with multiple active jobs, constant client communication, supplier coordination, billing oversight and internal reporting. In that environment, production visibility can be delayed. Labor costs might be reviewed weekly instead of daily. Field reports may confirm that work is progressing but fail to reflect whether it is progressing efficiently. By the time a variance becomes obvious on a cost report, the window for correction has closed.
Field rhythm plays a larger role than many contractors realize. A roofing project has a cadence. Tear-off, substrate prep, dry-in, membrane installation, flashing details: each phase depends on controlled sequencing. When that rhythm is disrupted, productivity drops. If the tear-off gets too far ahead, crews begin working overtime to cover the exposed areas. If materials are delivered without regard to sequence, installers spend more time moving product than installing it. When schedules compress under external pressure, crews push harder and safety and quality suffer. This is not a skills issue; it is a planning and coordination issue.
Communication friction adds another layer. Information moves through several hands before reaching the installer. Sales transfers scope to estimating and estimating transfers intent to operations. Operations transfers direction to the project manager. The project manager communicates with the foreman, who guides the crew. At each step, the original intent can erode. The message does not change entirely but its sharp edges soften. What began as specific instruction becomes a general understanding. That general understanding becomes an assumption. Assumptions, once again, cost money.
Owners and general contractors introduce their own pressures. Mid-project modifications, schedule acceleration or access constraints require adaptation. Strong contractors handle change professionally but adaptation without recalibrating cost expectations creates an imbalance. When crews adjust effort without formal alignment of scope and compensation, drift accelerates.
Contractors that avoid this pattern do not rely solely on hope or effort. They build mechanisms that keep the estimate connected to the field. Pre-job meetings are not ceremonial: they are detailed alignment sessions. Production expectations are discussed openly with field leadership. Assumptions are reviewed against site realities early, not halfway through the job. Labor hours are evaluated frequently enough to allow adjustment, not as a post-mortem explanation.
These companies also create visibility into daily production without overwhelming the field with paperwork. They know what square footage should be installed under normal conditions. They understand how access constraints affect output. When conditions change, they recalculate expectations rather than pretending the original numbers still apply. That discipline prevents small variances from becoming large losses.
Perhaps most importantly, they treat the middle of the job as the most critical phase for profit protection. Many contractors focus heavily on winning the bid and closing the job. The quiet middle period receives less structured attention. Yet that is where margin is won or lost. It is where production either confirms the estimate or challenges it. It is where sequencing either supports efficiency or undermines it and where communication either stays clear or gradually blurs.
Slippage is subtle. It rarely announces itself. It shows up as minor schedule compression, small scope clarifications, incremental labor creep and a few additional material needs. By the time the project is nearing completion, the final numbers tell the story and the lesson can feel expensive.
Roofing remains a field-driven business. No spreadsheet can install a membrane and no dashboard can set a termination bar. Discipline between estimating and execution determines whether the work performed reflects the price. When that connection is maintained, profit follows. When it weakens, projects begin to slip.
The strongest contractors understand that margin is not protected at the end of the job. It is protected in the daily alignment between expectation and execution. It is guarded by clear scope definition, frequent labor review, deliberate sequencing and direct communication. Projects do not fail suddenly. They slip quietly and companies that recognize slippage early are the ones that stay firmly on course.
John Kenney, CPRC is CEO of Cotney Consulting Group, Plant City. He has decades of experience on commercial roofing projects, providing a unique understanding of what it takes to succeed in roofing – on the roof, in the office and at scale. John saw the need to provide contractors with strategic guidance built on real-world field knowledge. Cotney Consulting offers COO on Demand, online training, technology solutions, business advisory consulting, collections, contracts, Castagra estimating training, safety and OSHA training. John partners with FRSA to provide educational seminars. For more information, contact John at jkenney@cotneyconsulting.com or 813-851-4173.