A mower, cardboard boxes and upholstered furniture need different storage conditions. Tell the contractor what will go inside so you can discuss the enclosure and moisture control you actually need.
Begin with the contents
List items that are sensitive to humidity, temperature or occasional moisture. Read storage guidance for products where it matters. Decide whether your goal is simply covered storage or a more controlled indoor environment; those are different project detailss.
Photograph the proposed site after ordinary rain if you can. Record puddles and runoff you have observed without diagnosing the cause. Give this information to the contractor when discussing the floor, drainage and enclosure details.
Ask how the whole assembly works
Roof, walls, floor, openings and any ventilation or conditioning should be considered together. Ask the supplier to explain what a proposed liner or insulation system is intended to do and what it does not address. A single product label is not a complete moisture plan.
Avoid promising yourself indoor-home conditions from an unconditioned shed. If belongings require a controlled environment, ask qualified professionals to scope the systems and operating needs before selecting the shell.
Plan usable storage habits
Show shelving and access routes in the layout. Leave enough room to inspect stored items and maintain the building. Ask for the manufacturer's maintenance information and keep it with the project documents.
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