Besides, building codes commonly require that at maximum there should be for every 8 inches of ramp horizontally there should only be a 1 inch slope. Ease of use while most ramps are not as large as a barn, you can build a ramp that would make it easy for you to bring out or in a garden tractor or a lawn mower. Don t forget to leave an opening for your door and windows. Step 5. Leave a gap of about three to four inches for ventilation for the frame of the roof. Connect your lumber from one side of the post to the other. Make a six inch overhang for each lumber. Level your frame. If you want a slanting roof, make one side about three to four inches higher. Commonly, these materials and tools are wood, nails, roofing, hinges, cement, sand, hammer, tape, saws, and screws. Start from the ground up. Make sure that your foundation is level. Nail your floor properly to the foundation blocks. After the floor, make the frame for your walls and then for the roof. First things first, if you want your lean to shed to look good and make it seem as it has been with the original plans of your home, you should design your shed to have a finish that is the same as your home. You should also use materials and design to make a continuous flow. The planning stage is very crucial and you should explore all your options so that you will be able to work without any glitches later on. Some would immediately think that pallets, being the way they are, would just be an eyesore, but not if you have a good set of plans. Making a beautiful and effective wooden pallet shed can be the answer to your storage woes. Not only are they widely available, they don t really cost that much, you might even get them for free. Like in any other roof, any destruction like a strong gust of wind or accidentally dropping a shingle can lead to an accident. Make yourself stable or get some help. If you live in an area where there is heavy snowfall and frequent snow storms, building a steep pitch will help remove excess snow as it can slide off easily.