I would advise you to aim for the type of wood that is resistant to deforming, fading, pets and dampness. Once at a local lumberyard, request for the heartwood, which is the innermost part of the wood in a tree. Unlike sapwood which is the outer most wood found in a tree, it is resistant to harsh conditions. The following species of wood are suitable for shed building: Cedar, Cyprus, and Redwood. Before buying the wood, check thoroughly that it has been well processed. Be cautious of wet wood to avoid shrinkage after you have already bought it and also Greenwood which may cause you inconveniences. The most common type of outdoor wood is pressure treated and consists of pine and fir.
We built the Colonial-style garden shed shown here from a set of mail-order building plans. The 10 x 16-ft. outbuilding has easy-to-install plywood siding, three large windows and two pairs of doors. The entire building could be used for storage, but we decided to divide the interior space into two separate areas: a 4 x 10-ft. tool-storage area and a 10 x 12-ft. children's playroom.
When you use the information given in this program to build wooden sheds rather than focus on expensive materials, you will be able to save a huge amount of money. Everything in this program has been explained in an easy to understand method. When you purchase this program, it is important to find a reputed retailer. You need to find someone who sells only authentic products at reasonable prices.
The shed we built rests on a foundation made up of 12 solid-concrete blocks. The 4 x 8 x 16-in. blocks are arranged in three rows spaced 59 in. apart. These blocks are typically set directly on the ground, but we put down a 4-in. bed of gravel first because our site occasionally receives groundwater. The gravel will keep the soil beneath the shed from eroding or becoming soggy.
Figure A (above) and Figure E show how to build a shed and the exterior trim details. Start by mounting the brackets. Line up the outside edges of the lower brackets with the face of the siding, push them tight to the soffit and screw them to the wall. Center the top bracket on the peak and push it tight to the soffit. Starting with the pieces that go under the brackets, wrap the corners with the corner board. Overlap the front corner board onto the side corner board (Figure E).

You can cut steel roofing panels with a circular saw and a carbide blade, but it’ll save you a lot of work if you order the panels the right length to start with. Plus, you’ll have a greater color selection if you order the roofing rather than buy off-the-shelf panels. Remember to order in advance, though, since it usually takes several weeks for the roofing to arrive. And make sure the overhangs are the right size so the panels will overhang the fascia slightly.

Normally we try to help our customers as much as possible, especially if it is a matter of helping to figure out where certain material goes on the building. Keep in mind, you are responsible for correctly constructing the shed if you purchase a kit, but we can offer direction. (Prior construction experience is recommended.) If there is any uncertainty about whether or not you will be able to assemble the storage shed, consider one of our build-on-site options and we will send a team to assemble the building for you.

For the shed's floor deck, use ¾-in. exterior-grade plywood; anything thinner will flex between joists. (Note that a double layer of ½-in. exterior ply is okay, too.) If you plan to store heavy items, such as a lawn tractor or woodworking machines, consider using ¾-in. tongue-and-groove plywood. This costs slightly more, and is a bit more troublesome to install, but its edges lock tightly together, creating a rock-solid, rigid floor. In areas with excessively high moisture and large numbers of wood-boring bugs--such as Florida, Alabama and the other Gulf Coast states--consider using pressure-treated plywood for the floor deck. It's particularly resistant to moisture and insects.

Before we can finish the base we need to get the electrical ready.  Put a peice of conduit over your electrical wire to protect it from any damage it could receive while you are finishing the base and to give the shed a more finished look.  Make sure the pipe and wire inside are pointing up perpendicular to the ground and are preferably going straight to the location where your first outlet will be.
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Working from ladders is more dangerous than working from scaffolding. Plus, having to constantly move ladders around is time consuming. When you get to the roof construction, consider renting a set of scaffolding with wheels. You’ll be amazed at how much easier it is to have a stable platform to work from and to set your tools and materials on. You can rent a 5-ft.-tall section of scaffold with three planks and wheels for about $110 per week.

DIY Shed Plans