Start by putting a truss at the front end of the garage.
Garage pitched roof construction.
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If you want to build a shed garage or other similar type of building then 4 to 6 is a preferable pitch type.
Medium pitched roofs most roofs in america follow these dimensions where pitch range is kept between 3 to 7 1 2.
Minor repairs had been made over the last 3 or 4 years to repair rotten chipboard.
In the end most of the front view of the roof had rotted away which resembled the bottom of a rabbit s cage.
You should put a truss over every second joist.
This shows the existing extension fitted with a flat roof which was probably in excess of 20 years old.
Measure the width of the garage to know how long you need them to be and count how many joists there are along the length.