The CGL covers risk to “your property” which the policy defines broadly. To prevent the application of this definition to the insured’s actual work (either physical or intellectual), the policy specifically excludes “Damage to Your Work.” In this post, I’ll cover sections (a)(1) and (2) of the exclusion.
Here is the language covered in this post:
Your work, means
Let’s begin with sentence 1. “Or” is a coordinating conjunction, which connects words of equal rank. “Work” is an, “activity involving mental or physical effort done in order to achieve a result.”  “Operations” are “a process or series of acts performed to effect a certain purpose or result.” This word implies a specific process. For example, workmen must remove an old air conditioner before installing a new one. These two nouns cover the gamut of production methods for an economic output.
“Performed” is the past tense of the transitive verb “perform,” which means to, “carry out, accomplish, or fulfill.” Two prepositional phrases are verbal objects. The first phrase begins with “by,” which means, “through the agency or act of.” “You” refers to the insured. This phrase applies when the insured performs the activity. The second prepositional phrase begins with “on,” which means, “the agent or agency of a specified action” while “behalf” means, “as the agent of.” This phrase means a third party acts as an agent of the insured.
We can rewrite the first sentence as, “the insured or his agent performs the work or operation.”
The second sentence contains a list of three items (“Materials, parts, or equipment”), which references the contractual interpretive maxim of, “expressio unius exclusio alterius: “If one or more specific items are listed without any more general or inclusive terms, other items although similar in kind are excluded.” This is the exclusive list of items an insured can “furnish.” “Materials” are the “tools or apparatus for the performance of a given task.” “Parts” are, “a component that can be separated from a system,” while “equipment” is, “the item needed for a particular purpose.”
The insured “furnishes” these items, which means they are provided “to equip with what is needed.” The definition casts a wide net to incorporate all physical items the insured incorporates into the final product. Returning to the air conditioning example above, this definition would cover all the individual parts used as part of the assembly from the smallest screw to the outside condenser and attack unit.
To conclude, “your work” means all the physical or mental labor performed and includes all the items included as part of the work.
 2(k) of the CGL
 Concise Oxford English Dictionary, 11th Edition, © 2004, p. 1661
 The definition also covers intellectual activity (it includes “mental … effort”), preventing a knowledge-based service provider (such as an accountant, lawyer, doctor or engineer) from attempting to argue a CGL applies to his professional activity.
 The American Heritage Dictionary, Second College Edition, © 1985, p. 871
 Oxford at p. 1064
 American Heritage at 222
 From the opening paragraphs of the policy.
 American Heritage at 867
 American Heritage at 168
 Kastely, Post, and Hom, Contracting Law, second Edition, © 2000 Carolina Academic Press, p. 724
 American Heritage at 772
 Id at 905
 Oxford at 402
 American Heritage at 540