When it comes to shed construction, learning how to build a shed roof sometimes slows people down. Many people are stumped when it comes to sloping roof angles and rafters that hang over the edges of the walls or cutting the birds’ mouth on a rafter because the walls seem to be simple because they are square and stand straight up. This article explains how to design a shed roof with a 4/12 pitch and a peak in the centre, removing some of the mystery surrounding shed roof construction. If you are looking for more tips, check out read the article
The Walls Must Be Plumbed
The first step is to ensure that all of the walls are plumb and square, meaning that they stand straight up and down and have square corners. These two things are crucial since the walls will be permanently trapped in whatever place they are in until the roof trusses or rafters are mounted.
Place a level on the shed’s side and move the walls until they are straight, then brace them in place with scrap wood. Crooked walls are a bigger issue in larger sheds because there’s more space for stuff to get out of square.
Measure diagonally from corner to corner to see if the shed walls are square. Push the corners in or out until they are the same size.
Rafters For The Shed Roof
The next step in learning how to create a shed roof is to design the roof rafters after squaring up the shed walls. It’s not as difficult as it seems. If your shed designs don’t include a drawing of the roof trusses, the simplest way to build a roof rafter is to sketch it out full size on the floor, then cut it out and match it to the full size drawing. The most popular shed roof slope is 4/12. This means that for every 4 inches that the roof rises vertically into the air, the wall rises 12 inches horizontally. The minimum slope that shingle manufacturers would allow in order to guarantee their product is 4/12. The measures for drawing a 4/12 pitch roof rafter on the ground are as follows.