1. Pay attention to the trusses. In areas with heavy snowfall, trusses should be at least 2×6″ and have metal truss plates. Lighter snowfall areas can get by with 2×4″ trusses.
2. Look underneath the building. A portable storage building should come with 4×6″ pressure treated skids and 2×6″ pressure treated floor joists.
3. Check the floor joists. In a standard shed, they should be 16″ on center. If have heavy-duty flooring, like what may be found in a portable garage, check to be sure that the joists are pressure-treated and 12″ on center. You’ll also need 3/4″ floor decking in this case.
4. Look for vents. Your storage building should have at least two vents to keep the building cooler during the hot summer months. This is particularly important if your geographic area tends to get excessively hot during the summer. You don’t want your stored items melting in the heat–nor do you want to touch metal items that have been hanging in a too-hot storage building!

5. Check out the warranty. Any portable building you decide to purchase for your home should include a warranty on construction and workmanship. Manufacturer warranties on materials used to build the shed are also important.
Your storage shed is a big purchase, and you want to be sure that you get it right! By checking out these critical criteria, you’ll find that you’re able to make a responsible purchase that will help store your possessions for a long time.