(1) "Repair work" means any work done to siding, gutters, a roof system, or a window system to repair damage caused by wind or hail.
(2) "Residential building" means a single or multiple family dwelling of up to four units.
(3) "Residential contractor" means a person that, for compensation, other than wages as an employee, contracts or offers to contract to perform repair work on a residential building.
(4) "Roof system" includes roof coverings, roof sheathing, roof weatherproofing, roof framing, roof ventilation, and roof insulation.