The design doesn t just end with the exterior of the farm. Although this is the most important to ensure that your farm shed is durable and strong enough to withstand harsh weather conditions, especially the roof, you will also design your interior, to maximize the space you have. There are many downloadable farm sheds available for you. Step 3. After clearing up the soil, dig inside your outline with a depth of about eight inches. For the base, transfer inside sand, about two inches will do. Compact the soil and make sure that it is leveled. Using a post digger, dig six holes, three on each side of your outline, about 4 inches deep. You certainly wouldn t want to walk far just to get some when it s raining hard or there is heavy snowfall. Also, try to build a raised floor so that moisture from the ground would not easily seep inside the shed. Wet wood easily gets rotten and decomposes. With regards to the roof of your firewood shed, you should make sure in your plans that it has a high steep and is slanted. With any structure, the roof is the most critical part, it should be able to withstand a heavy load, protect against the sun, rain and winds, and equally important, look good as well. If your shed looks like an eyesore, then maybe the convenience it brings is not worth it, especially if your neighbors and guests complain about it. Depending on the size of your shed and what you plan to store inside, you can choose from either a concrete foundation or just the plain earth. The latter is not really recommendable especially if it contains a lot of moisture. It is also very difficult to level and create framing for your partitions. Also, you will save money as well and possible worries knowing that your belongings inside the shed is safe. The single most important aspect in building a shed roof is to have a comprehensive plan, if you have no inkling on how to do this; it is wise to invest on it as it is your basis for your building project.