FAR 52.236-5—Material and Workmanship.
Plain-English Summary
FAR 52.236-5, Material and Workmanship, sets the baseline quality and approval requirements for construction contract inputs and performance. It covers four main topics: the requirement that incorporated equipment, materials, and articles be new and of the most suitable grade unless the contract says otherwise; the treatment of brand-name, trade-name, make, catalog, or patented-process references as quality standards rather than competition limits; the contractor’s right to propose equal items subject to the contracting officer’s judgment; the contracting officer’s approval authority over machinery, mechanical and other equipment, and in some cases materials or articles, including the right to require detailed product information and samples; and the requirement that all work be performed in a skillful, workmanlike manner, including the contracting officer’s authority to require removal of objectionable employees. In practice, this clause protects the Government from inferior substitutions, ensures that proposed products meet the intended performance standard, and gives the contracting officer a direct tool to control quality before defective items are installed. It also creates a clear risk allocation: if the contractor uses unapproved items, they do so at the risk of later rejection, replacement, or rework. For contractors, the clause means product submittals, approvals, and workmanship standards are not optional administrative steps—they are contract performance requirements with real cost and schedule consequences.
Key Rules
New, suitable materials
All equipment, material, and articles incorporated into the work must be new and of the most suitable grade for the intended purpose unless the contract specifically allows otherwise. This establishes a default quality floor and prevents the use of inferior, used, or inappropriate items without express authorization.
Brand names set standards
References to trade names, makes, catalog numbers, or patented processes are treated as quality benchmarks, not as restrictions on competition. Contractors may propose equal items, but only if the contracting officer judges them to be equal and the contract does not specifically prohibit substitutions.
Approval before incorporation
The contractor must obtain contracting officer approval for machinery and mechanical and other equipment to be incorporated into the work, and must provide the manufacturer, model number, and other performance information. When the contract or contracting officer requires it, the contractor must also obtain approval for materials or articles and provide full information, and may be required to submit samples at its own expense.
Unapproved items are at risk
Machinery, equipment, material, and articles that do not have the required approval are installed or used at the contractor’s risk of later rejection. This means the contractor may have to remove, replace, or correct the work without additional compensation if the items are found unacceptable.
Workmanship must be skillful
All work must be performed in a skillful and workmanlike manner. This is a broad performance standard that applies to the quality of labor, installation, assembly, and execution, not just the quality of the materials used.
Contracting officer may remove personnel
The contracting officer may require in writing that the contractor remove any employee the contracting officer deems incompetent, careless, or otherwise objectionable. This gives the Government a direct quality-control remedy when personnel performance threatens contract compliance or safety.
Responsibilities
Contracting Officer
Determine whether proposed equal items are acceptable; approve or disapprove machinery, equipment, and, when required, materials or articles; request detailed product information and samples when needed; enforce the workmanship standard; and direct removal of employees who are incompetent, careless, or otherwise objectionable.
Contractor
Provide new, suitable-grade items unless the contract allows otherwise; treat brand-name references as standards and seek approval for any proposed equal; submit required product data, manufacturer/model information, and samples; avoid installing or using unapproved items; perform all work skillfully and in a workmanlike manner; and remove personnel if directed in writing by the contracting officer.
Agency/Owner
Through its contracting personnel, ensure the clause is used in appropriate construction contracts and support enforcement of quality and approval requirements so the Government receives conforming work and materials.
Practical Implications
Contractors should treat submittals and approvals as critical path items, because installing unapproved products can trigger rejection, replacement, and delay costs.
Brand-name specifications do not automatically lock out alternatives, but the contractor bears the burden of proving an equal product and getting the contracting officer’s approval before use.
The clause gives the Government leverage to stop quality problems early; if workmanship or personnel issues arise, the contracting officer can require corrective action or removal of workers.
Common pitfalls include assuming a catalog match is enough without formal approval, substituting used or lower-grade materials, and failing to submit complete product data or samples.
Because unapproved items are used at the contractor’s risk, contractors should document approvals carefully and confirm that any deviation from the specifications is expressly authorized in writing.
Official Regulatory Text
As prescribed in 36.505 , insert the following clause: Material and Workmanship (Apr 1984) (a) All equipment, material, and articles incorporated into the work covered by this contract shall be new and of the most suitable grade for the purpose intended, unless otherwise specifically provided in this contract. References in the specifications to equipment, material, articles, or patented processes by trade name, make, or catalog number, shall be regarded as establishing a standard of quality and shall not be construed as limiting competition. The Contractor may, at its option, use any equipment, material, article, or process that, in the judgment of the Contracting Officer, is equal to that named in the specifications, unless otherwise specifically provided in this contract. (b) The Contractor shall obtain the Contracting Officer’s approval of the machinery and mechanical and other equipment to be incorporated into the work. When requesting approval, the Contractor shall furnish to the Contracting Officer the name of the manufacturer, the model number, and other information concerning the performance, capacity, nature, and rating of the machinery and mechanical and other equipment. When required by this contract or by the Contracting Officer, the Contractor shall also obtain the Contracting Officer’s approval of the material or articles which the Contractor contemplates incorporating into the work. When requesting approval, the Contractor shall provide full information concerning the material or articles. When directed to do so, the Contractor shall submit samples for approval at the Contractor’s expense, with all shipping charges prepaid. Machinery, equipment, material, and articles that do not have the required approval shall be installed or used at the risk of subsequent rejection. (c) All work under this contract shall be performed in a skillful and workmanlike manner. The Contracting Officer may require, in writing, that the Contractor remove from the work any employee the Contracting Officer deems incompetent, careless, or otherwise objectionable. (End of clause)