7 Common Shop Drawing Mistakes That Delay Projects
Construction projects depend on coordination. When information is incomplete, unclear, or overlooked during the shop drawing process, delays can quickly follow.
The good news is that many common project issues can be avoided with proper planning and accurate shop drawings.
Whether you're working with architectural metal panels, ACM systems, fiber cement, metal roofing, insulated metal panels, or other Division 7 systems, avoiding the following mistakes can help keep projects on schedule.
1. Submitting Incomplete Project Information
One of the most common causes of delays occurs before drafting even begins.
Missing architectural drawings, incomplete specifications, outdated plans, or unavailable manufacturer information often create unnecessary questions and revisions.
Providing complete project information at the start of a project helps ensure a smoother drafting process and faster turnaround times.
2. Overlooking Coordination Between Trades
Division 7 systems rarely exist in isolation.
Wall panels, roofing systems, curtain walls, structural framing, waterproofing, and other building components must work together.
When coordination issues are not identified early, conflicts often appear during fabrication or installation.
Shop drawings provide an opportunity to review these interfaces before they become field problems.
3. Missing Critical Dimensions
Accurate dimensions are essential for fabrication and installation.
Missing measurements can lead to assumptions, additional revisions, fabrication delays, and installation challenges.
Verifying dimensions during the shop drawing process helps reduce uncertainty and improve accuracy throughout the project.
4. Waiting Too Long for Shop Drawing Review
Shop drawings are sometimes viewed as a task that can wait until later in the project schedule.
Unfortunately, delayed reviews often create schedule compression, leaving less time for approvals, fabrication, and installation.
Starting the review process early helps maintain project momentum and avoid unnecessary pressure later.
5. Making Major Design Changes After Approval
Design changes are sometimes unavoidable, but late changes often impact schedules and budgets.
Significant revisions after shop drawing approval can require updates to drawings, additional reviews, material changes, and fabrication adjustments.
Whenever possible, major design decisions should be finalized before fabrication begins.
6. Focusing Only on Individual Details
A detail may look correct by itself while still creating conflicts elsewhere in the project.
Successful shop drawing review requires looking at the entire system, including transitions, terminations, attachments, and adjacent materials.
A project-wide perspective helps identify issues that may not be visible within a single detail.
7. Treating Shop Drawings as a Formality
Perhaps the biggest mistake is viewing shop drawings as simply another box to check.
In reality, shop drawings are one of the most valuable project coordination tools available.
They provide an opportunity to identify problems, improve communication, confirm design intent, and support successful fabrication and installation.
Projects that invest time in thorough shop drawing review often experience fewer surprises during construction.
Final Thoughts
Most construction delays are not caused by a single major issue. More often, they result from a series of small problems that compound over time.
Accurate shop drawings help identify many of these issues before they affect fabrication, delivery, or installation.
At Innerwall Company, we specialize in Division 7 shop drawings for contractors and manufacturers throughout the United States and internationally. Our goal is to provide accurate, professional drawings that help teams avoid costly mistakes and keep projects moving forward.
A little extra attention during the shop drawing phase can save significant time, money, and frustration later in the project.
