Maintenance is not considered improvements.
From the definitions section:
(4) "Home improvement" includes, but is not limited to, the repair, replacement, remodeling, alteration, conversion, modernization, improvement, rehabilitation or sandblasting of, or addition to any land or building or that portion thereof which is used or designed to be used as a private residence, dwelling place or residential rental property, or the construction, replacement, installation or improvement of driveways, swimming pools, porches, garages, roofs, siding, insulation, sunrooms, flooring, patios, landscaping, fences, doors and windows and waterproofing in connection with such land or building or that portion thereof which is used or designed to be used as a private residence, dwelling place or residential rental property or the removal or replacement of a residential underground heating oil storage tank system, in which the total cash price for all work agreed upon between the contractor and owner exceeds two hundred dollars. "Home improvement" does not include: (A) The construction of a new home; (B) the sale of goods by a seller who neither arranges to perform nor performs, directly or indirectly, any work or labor in connection with the installation or application of the goods or materials; (C) the sale of goods or services furnished for commercial or business use or for resale, provided commercial or business use does not include use as residential rental property; (D) the sale of appliances, such as stoves, refrigerators, freezers, room air conditioners and others which are designed for and are easily removable from the premises without material alteration thereof; and (E) any work performed without compensation by the owner on his own private residence or residential rental property.
The Home Improvment Act in CT largely in response to unscrupulous replacement window and siding contrators etc. taking advantage of homeowners, largely senior citizens.