First, learn about your local zoning laws and find out if there are any restrictions or code requirements for storage buildings. Plan the width and length of the project and decide how you want the slant roof attached to the shed. Next, select materials for its foundation. Most people prefer pressure treated skids because they are easy to use and are very durable.
Now its time to select materials for the construction. Lumber is more suitable because it’s less expensive and fairly strong. Consider tin as your sliding and roofing material since it is durable and rust resistant. Whichever material you decide to use, ensure that it matches with your existing building and is also good for the climate in your area.
Make a list of materials needed for the project. You will need lumbers cut into appropriate sizes according to the size of the roof that is needed. You will have to use 4 by 4 pressure treated pines to support the 2 by 4 boards spanning about 15 feet.
Make sure to get screws or nails to be used as fasteners. The nails have to be large enough for good penetration and proper holding of units together. Screws are usually used in this project to fasten dissimilar materials such as wood framing or metal framing.
Dig holes for the supporting posts. The distance between the walls should be properly measured. Instead of using a measurement between the posts and the building, try to use a string line since this will be a lot easier.
The next step when making a lean-to shed is to use a builder’s level or line level to mark a reference grade (a bench elevation) on each post. This line will show the bearing height appropriate for the rafters. Begin by marking the end posts and make use of a chalk line when marking the intermediary posts.
Notch the tip of the posts in such a way that the rafter supporting joist or rafter supporting nailer lies on the notch. Make use of a circular saw and cut about 4cm into the post at its base. Then use the circular saw again to cut about 4cm deep at the top of the post in the same position as you did in the first. You can also nail straight to the post but this may likely weigh too much on the rafters.
The posts need to be filled with pre-packaged concrete mix in case your area is prone to severe storms or high winds. But if your area has moderate weather condition, all you need to do is fill dirt into the holes in order to secure the posts. Don’t overlook a critical connection before moving on to the next.
The final step to take when making a lean-to shed is to add roofing. Plan out the spacing for your roofing and make sure they tally with the spacing of the posts. Make use of two nails on each rafter and nail the lath properly. Add pre-framed exterior doors and windows to complete the structure.