In case you are installing off the side of your wall then you need to bolt the timber in its place keep it firm and by making use of a spirit level you need to ensure that it s levelled.
How to build a small pitched roof.
Step 1 layout the pattern rafter after you decide to build a pitched roof you can layout and cut a rafter pattern.
If you are building a bigger roof or don t have the luxury of a having a concrete roof as a base then you will need to design your roof to suit your application if you were to just scale up my design it may end up beeing too weak for your application.
Lay a framing square flat on the board near one end so that the horizontal blade aligns with the bottom edge of the board at 12 inches and the vertical blade is aligned at the roof pitch.
Subtract the length of the tile that will overhang the roof to allow any off flowing liquid on the roof to flow into the gutter.
Line up wall plate against existing joists and make a mark on the wall plate in line with the centre of the joists.
This is part two of the porch build where i am doing the roof.
Now you have to add a beam from the timber on the high side of your sloped roof.
Make sure that this timber has been cut down to the right length.
Cut back the joist to allow fixing of front wall plate so that the front wall plate fits flush with the external front wall.
Next measure the area and make calculations so you know how much of your chosen materials to buy.
To build a roof start by deciding whether you want to put up a flat or pitched roof on your building.
How to build a pitched roof frame.
Purchase your materials including prefabricated trusses plywood covering and roof tiles.
This wall plate will sit on the first skin brick work.