Gable Roof Size

Measure and mark the square footage of each triangular section carefully as these tend to differ in size.

Gable roof size.

For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. Use the saltbox roof to calculate a two sided roof with different slopes spans and or overhangs for each side of the roof. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. The table states that 2 x 6 rafters spaced 16 inches on center o c can span a maximum distance of 13 feet 5 inches.

Another option are 2 x 8 rafters spaced 24 inches o c. There are several variables to consider when determining the proper rafter size. In making your choice consider how you will insulate your insulate your roof. Length from ridge to eave.

Gable roof a gable roof has two opposite sides with equal slopes and equal spans that meet in the center of the roof at the ridge. Total roof width with rake overhangs. Gable roof framing calculator plan diagram with full dimensions for a good straight fascia add an extra inch or 2 to the tails of all your rafters total length. Measure out horizontally 12 one foot from the gable end sloping trim to a point along horizontal siding or use your level to make a mark that is level horizontally measured out 12 from the sloped gable trim or roof edge.

If you have a roof section that s 30 feet 9 1 m long and 12 feet 3 7 m high multiplying those dimensions would give you an area of 180 square feet 17 m 2. Total rafter lumber length. Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure. 10 add up the areas of each section to get your total square footage.

This sizing guide for roof rafters will help determine what you need for your small project. Check that your footage measurements are within this range so you can start off on the right foot. Rafter plumb cut depth.