To reduce contamination.

To increase reflective lighting and productivity.

To gain access for repairs during inclement weather.

To protect against environmental damage during reconstruction or repairs, or while awaiting repairs. 

The environmental factors shrink wrapping can virtually eliminate are: precipitation: rain, snow, hail, ice. wind, excessive temperatures, salt air, bird droppings, rodents, insects.

To protect the boat for a season against winter storms.

To provide a humidity and temperature controlled environment for custom paints, patching materials, and solvents.

To save money by reducing labor costs, workers compensation, insurance, lost material charges, and risk of environmental issues.

Degrade your property through dry rot, mildew, rust, and corrosive compounds.

Reduce the effectiveness of your serviceman when conducting repairs, by limiting the hours they can work due to inclement weather and poor lighting, increasing the environmental clothing they must wear.

Increasing worker safety risk due to ice, darkness, wind, animal feces, blowing dust, sandblast debris, etc.

Increasing the risk of lost tools and materials.

Degrade the repair materials prior to installation.

Any experienced shrink wrapping company.  It additionally is important to verify their credentials and past work.

Virtually anywhere. Shrink wrapping can be done during cold or hot weather. It is not advisable to shrink wrap during windy, moist days, however, framing can be assembled during those times if needed.

The amount is relative to the design, environmental conditions, location of the work, personnel to be involved, the type materials used, and any related equipment rental. Each job is unique. 

But consider all the costs associated with not properly protecting your property and weigh the difference.

Shifting causes abrasion.

Not preventing weather from blowing underneath.

Laying against the wood or metal results in damage from condensation.

Not preventing birds, rodents, or insects from entry.

Flapping causes uneven pressure on a boat part, tarp destruction and can be annoyingly noisy.

Sagging which causes moisture accumulation on the tarp's top, which can pull the tarp off entirely or put undue force upon part of a boat.