The framing is the most important part of the above-ground structure because it stiffens up the plywood boards and supports the roof.  You will need a lot of 2x4's, and a way to attach them.  We used this as an excuse to buy some new air hammers from canadian tire.  We were able to get the lumber for the entire project delivered by a company called Tamrack Lumber.  They brought out a truck and dropped off all the supplies.  For the roofing you will need little plates with groups of nails sticking out of them which I believe are called joist plates.  These are used on the angles to keep them from shifting.  The last thing you will need is a way to cut all of the 2x4's.  To do this we borrowed a very nice miter saw from a friend for a few days.  It is much easier if the cutting tool can cut on angles, otherwise you will be left to improvise when cutting the peices for the roof.
• Wastage of space — this is one of the greatest mistakes one can make. It is mostly caused by poor construction planning. You may such a mistake also by taking measurements poorly. You should consider all the activities and purposes that you will use your shed for before starting the construction. In that manner, you will be able to come up with a shed design that will suit its purpose and your wishes. One may also consider building a double floor shed to save on your compound space. You wouldn’t want to deny your kids their playing ground! You may also want to construct a different structure in the future then you get hindered due to the little space left or unless you would have to dig deeper into your pockets to modify your shed.
The last thing you want is to build a shed only to discover that it’s too small to hold your stuff, handle your hobby, or otherwise meet your needs. By the same token, you don’t want a shed that’s so large it overwhelms your property and looks ungainly behind your house. Choosing the wrong size shed is a common homeowner error, but LP Outdoor Building Solutions’ handy tool helps you get it just right. Check it out, and you’ll see that size does matter!
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