Increase the floor space with Overhead Garage Storage

Create storage room in the open space under your garage roof using basic carpentry skills and available building materials or manufactured garage storage racks. Use overhead garage storage to make room for your cars and avoid having to rent a storage unit or put up a shed on your property to store those things you use less often. You'll appreciate the neat organization, convenience and time saved by utilizing all your garage space.
There are usually two types of overhead garage storage solutions; raised shelves and wall-hanging cabinets. Simply because of the fact that these cabinets and shelves are placed above our heights, we not only get to enjoy the entire garage floor, but also can store additional items in our garages if need be. Anyway, with an overhead garage storage system you are using the air-space which would otherwise go unnoticed and unused. A shelf is good, but normally you would tend to store things that you would require less frequently on your overhead storage since repeated retrieval from these heights may be a challenge. But think of it - if you are storing items for longer durations then will they not stand a chance to become more dirty if you keep them exposed? Hence a wall-hanging cabinet is a stronger recommendation for your overhead garage storage.
Take advantage of the many metal overhead garage storage rack kits available for DIY garage installation. Measure the height clearance for your garage ceiling and the dimensions of usable areas to specify rack sizes and capacities. Manufactured garage storage racks give you a turnkey solution to adding overhead garage storage space.

Source:
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http://www.ehow.com/way_5968471_diy_-overhead-storage-garage.html