Means and Methods of Construction
Published: November 7, 2026 · Last reviewed: November 7, 2026 · Est. reading time 8 minutes
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In plain language: Means and methods of construction are the "how" of a building job: the equipment, crews, work order, and temporary supports a contractor picks to turn the plans into a finished structure. The owner and designers decide what gets built, and the contractor decides how.
Technical definition: Means and methods of construction are the techniques, sequences, procedures, and temporary works a contractor uses to complete a permanent project. Contracts usually assign them to the contractor. A commercial general liability policy ordinarily covers resulting bodily injury and property damage, while contractors' professional liability covers related design errors and economic loss.
Means and Methods of Construction at a Glance
The table shows where this contractor risk appears in an insurance program.
| Attribute | Detail |
|---|---|
| Also known as | Construction means, methods, techniques, sequences, and procedures |
| Category | Construction contract and liability concept |
| Lines of business | CGL, contractors professional liability, architects and engineers professional liability |
| Industries most affected | Construction, engineering, design-build |
| Related forms or endorsements | CG 22 79, CG 22 80 |
| Who bears the risk | Construction contractor and trade contractors |
| Common solution | CGL plus contractors professional liability |
| Also interacts with | Indemnity clauses, OSHA excavation rules, jobsite safety protocols |
Key Takeaways
- Contractors choose the means and methods, meaning the techniques, equipment and temporary works, used to build a project.
- Indemnity clauses and CGL professional liability exclusions both turn on who controlled the work.
- Many contractors assume their CGL covers every field design error, yet a CGL does not cover pure economic loss.
- Ask every contractor client whether its staff or hired engineers design shoring, rigging, or crane bases, and quote contractors professional liability when the answer is yes.
What Is Means and Methods of Construction in Insurance?
Means and methods of construction is a construction industry term for the techniques and tactics a contractor uses to build a permanent project, often through temporary structures such as scaffolding, shoring, and formwork. According to IRMI, some of these construction activities need design or engineering, such as trenching calculations or a tower crane base.
Design professionals on the owner's design team set the design intent and project requirements in the contract documents. Contractors control construction execution, including equipment selection, construction tools, material handling, resource allocation, and the project timeline. Common industry forms, such as the AIA A201 General Conditions, make the contractor solely responsible for construction means, methods, techniques, sequences and procedures, plus safety precautions.
OSHA draws a similar line. Its excavation standard, 29 CFR 1926.652, requires a registered professional engineer to approve certain sloping, benching, and support systems when the contractor does not use one of the rule's other options.
For example, a contractor miscalculates shoring for an elevated slab, and the slab must be poured again. The owner's claim for extra labor, materials and delay is mostly the cost of redoing the work, which the CGL's "your work" exclusions often limit.
How Does Means and Methods of Construction Work?
Control of the work moves through a construction project in a set order that decides which policy responds.
- Contract assignment. Construction contracts give the contractor control of how the work gets built and the designers control of the design.
- Field planning. A project manager and the site team choose crews, equipment, construction methods, and testing protocols, sometimes with an outside engineer.
- Loss event. A collapse, injury, defect, or delay happens, and investigators decide whether the design, site conditions, or the field approach caused it.
- Coverage response. Bodily injury and property damage usually go to the contractor's CGL, while design errors and economic damages go to contractors professional liability.
Claim Examples Involving Means and Methods of Construction
Trench collapse on a utility installation job
A utility contractor shored a trench from its superintendent's sketch, not an engineered design. A wall caved in and injured a worker employed by one of the subcontractors. The worker's suits against the utility contractor and the general contractor were covered under their CGL policies.
Crane base failure on a downtown tower
A contractor's engineer designed a tower crane base that settled during a lift. Nobody was hurt, but the owner sought damages for schedule disruptions. The CGL insurer reserved rights on this economic loss, and the contractor's professional liability policy paid for the design error.
Sequencing error on a curtain wall install
A glazing contractor rushed its work sequences, and wind cracked panels before anchoring. The broken glass was the contractor's own work, so CGL exclusions limited the payout. Without builder's risk or an installation floater, weak quality control on the construction site left the loss largely uninsured.
Means and Methods of Construction vs. Design Responsibility: What Is the Difference?
Contractor field control and design responsibility are separate jobs: the contractor builds, and the architect or engineer designs. The table compares both sides.
| Comparison area | Means and methods of construction | Design responsibility |
|---|---|---|
| Primary use case | How the contractor builds the work | What the finished work must be |
| Coverage/concept type | CGL plus contractors professional liability | Architects and engineers professional liability |
| Typical exclusions | Professional liability exclusions such as CG 22 79 or CG 22 43 | Injury and damage unrelated to design errors |
| Who is most affected by errors? | Contractors and injured workers | Owner, designers, contractors relying on plans |
| Common mistakes | Treating temporary works engineering as fully covered by CGL | Assuming a contractor's redesign stays with the architect |
What Are the Most Common Mistakes With Means and Methods of Construction?
- Assuming CGL covers all design work. A CGL does not cover economic damages, so redesign and delay costs can go uninsured.
- Missing the endorsement. IRMI expert commentary explains that CG 22 79 carves back services within construction means and methods, while CG 22 43 has no such exception. Not checking the form creates E&O exposure.
- Ignoring value engineering. A contractor that proposes design changes can take on design responsibility that its CGL may exclude.
- Leaving gaps in project documents. Without written requests for information and corrective action records, proving a failure came from the project specifications is hard.
- Skipping the contract review. Unread contracts can shift temporary works design to the contractor without anyone noticing.
How to Explain Means and Methods of Construction to a Client
Explaining Means and Methods of Construction to a personal lines client
Your contractor is responsible for how your addition gets built, including ladders, scaffolding, and the order of the work. If a worker gets hurt or your house is damaged because of how they built it, their liability insurance should respond.
Explaining Means and Methods of Construction to a small business owner
You are responsible for how you build, not just what you build. Your CGL covers injuries and damage to other people's property. If your team designs shoring, rigging, or any temporary support, you need contractors' professional liability for design mistakes the CGL excludes.
Explaining Means and Methods of Construction to a CFO or risk manager
Every contract assigns field-control risk, including delay and rework costs. Your GL program handles third-party injury and damage, but an exclusion may limit coverage for engineering your staff performs. Contractors' professional liability closes that gap and protects project success.
Frequently Asked Questions About Means and Methods of Construction
Who is responsible for means and methods on a construction project?
The contractor usually controls them under standard contracts. The owner and designers set the quality standards, and the contractor decides how to meet them. Contract language can shift this split.
Does a GL policy cover means and methods?
A CGL usually covers bodily injury and property damage that result from a contractor's field work. Pure economic loss, such as redesign or delay costs, falls outside it. Contractors' professional liability fills much of that gap.
What does contractors' professional liability cover?
IRMI describes contractors' professional liability as coverage for a contractor's design errors or omissions. Carriers often package it with contractors' pollution liability, written annually or for a single project.
Can an architect be blamed for a contractor's field decisions?
Architects generally do not control how the contractor builds, unless they start directing field sequences. Strong project leadership keeps the owner, architect, and contractor roles clear in writing.
Sources and References
- International Risk Management Institute (IRMI). Means and Methods of Construction.
- International Risk Management Institute (IRMI). Contractors Professional Liability Insurance.
- International Risk Management Institute (IRMI). The CGL and the Professional Liability Exclusion.
- Occupational Safety and Health Administration (OSHA). 29 CFR 1926.652 – Requirements for Protective Systems.