Adjustments may need to be made before you start the roof by measuring your span.
Roof plate level.
So the plate must be built up 1 6 inches per level foot of overhang.
In this case with unit rises of 8 inches and 9 5 8 inches the difference is 1 5 8 or 1 6 inches.
Flat or low slope roofs may develop leaks because of poor drainage.
They should be fixed firmly to the brick or blockwork underneath.
There are many reasons for a homeowner to want to change the pitch or slope of a roof.
To level the wall plates i find the straightest joist lay it from one wall plate to the other and put an 1800mm spirit level on it.
Jack up until level the frame a wall 16 on center between the 2x4 s that will serve as the top and bottom plate.
Another way when the roof is too large for that or there are not four corners is to use the 3 4 5 method shown here to make sure the corners are at a perfect 90 degrees.
The span is the measurement from the outside of one wall plate to the outside of the opposite wall plate.
You may do this 1 per day and roof rafters can handle more stress.
When the measurement is equal the plates are square.
If these already exist nail a 2x4 to them directly under the 2x4 plate you nailed down before.
How to change your roof pitch.
These are typically 1 2 m long with a cranked end and are fixed to the wall plate at 2 m centres.
Since the overhang is 16 inches or 1 33 feet the total buildup equals.
As the mortar does not bond the wall plate to the wall steel straps are used to ensure that the roof structure remains secure.