The floor in any outbuilding is often open to rain and water damage and will rot quickly. Green lumber that was pressure-treated is the best choice to use in outbuildings. Untreated construction lumber may cost less but eventually it will rot and ruin your building. Other materials that you need to frame the floor will be mudsills and band joists. The use of a mudsill is to rest it on your foundation and build the frame over it. Band and floor joists will be used on top of the mudsill and on the outer edge for protection and support. For the shed’s floorboards you should use ¾-inch thick exterior grade plywood. To prevent bending and buckling of the floor make sure that the plywood is not smaller than ¾-inch. To increase the firmness of your floor invest in grooved plywood that fastens together. Use screws when fastening the plywood as they hold better than nails.
In your patio outbuilding building diagrams (https://sheddrafts.com/12x16-gable-storage-shed-building-plans-blueprints) you will need to decide between hinged or sliding doors. If you want doors that seal shut and work well in small spaces add hinged doors. Use doors that slide when making your wooden outhouse assembly diagrams because sliders can tuck away and are simple to mount. However sliding doors do require more wall space than hinged doors. Medium to small sized outbuildings should opt for hinged doors as opposed to sliding doors. The longest side of your shed is the best placement for any door you choose. Measure twice and cut once to ensure the lengths and heights are correct. It is important to have accurate dimension or the door will not fit properly. Look in any home center to find a multitude of hinges made from various materials. Be sure to use two to three sets of secure hinges for a heavy door.
The decision of what kind of foundation you will need is dependent upon the size of your outhouse. The first item on your outbuilding plan should be to level the ground where the outhouse will go and add gravel. (12x16 gable storage shed building) The gravel bed will make sure that the soil beneath the outbuilding will not wash away. There are two basic types of shed foundations known as on grade and permanent. outbuildings that are smaller than 200 feet square are best constructed upon on-grade foundations. On grade foundations are usually constructed with dense concrete blocks and rows of large skids. When placing timber directly on the ground be sure that it is green or pressure-treated. The best kind of concrete block to use is one that is not hollow as those provide minimal support. Whether you are using cement or wood they should be leveled and then used to support the wooden floor frame. Once the pressure-treated lumber or solid concrete blocks are laid down on gravel you will have an easy foundation that will last for decades.
Since most storage outhouses don't have electricity install windows to add light to the interior. Patio Outhouse plans that have windows which face east or south will allow the most amount of light to enter. A simple and charming way to dress up your outhouse is to use windows of barn sash. You can find simple wood frames with single-pane glass in any home center. Installation of these windows is easy because you can install them upright or sideways. You can use the interior walls in a outbuilding as hanging storage so don’t overuse windows. Skylights let a flood of overhead light into a shed and unlike windows can leave wall space free. Plastic dome skylights are inexpensive alternatives to skylights made for houses. Dome skylights are easy to install as all you need to do is find where you want it and nail on the spot. Place plastic skylights on the side of the roof that's least visible.