When you are building a patio cover off of an existing roof or wall you must take all of your measurements from the point at which the patio roof will attach to the existing structure not the outside of the slab.
How to make a patio roof.
Attach the rafters attach 2x6 rafters to the house with joist hangers and or supported by the ledger board.
The ledger should be attached before the foundation is built for a deck patio roof posts and other structure.
Rafters are placed on 24 centers and attached to the beams and settle joists are attached as needed image 1.
It is almost similar to the first method but to make the patio roof a little bit higher you will need to remove the house gutter and place the back channel a bit higher.
Then draw a chalk line along the outlined area for placement guidelines.
The difference comes in with the type and installation of the beams.
Put a cement footing at each corner of the intended patio roof space and attach anchors to each footing.
The ledger typically a 2 by 6 is usually designed to hold one end of the patio roof rafters.
Let the epoxy set leaving it overnight will assure that it is rock solid and then add the anchor bolt anchor washer and nut and tighten.
This meant the patio cover could start at the edge of the house s roof at a height of eight feet and slope down to seven feet leaving a clearance of more than six and a half feet between the lowest part of the frame s headers and the ground at its outer edge.
Locating and mounting the ledger is normally a fairly easy process.
Both have posts or columns that support a frame.
Blow out the dust fill the hole with epoxy and insert the rod to the required depth.
Because the gutter is removed you will need to install transfer flashing from the roof of the house to the patio.
The existing concrete slab creates the angled floor of the patio and the roof line is built to match it and the odd lines of the house.
One side of the patio roof line will match the angles of the house while the other side of the roof line is straight.
Check local building code to see if you can attach a patio roof directly to your deck.
Louvered patio roof ideas.
A louvered patio roof is similar to a pergola.
Step 2 construct the vertical posts.
Using corrugated metal also allows me to reduce the degree of slope or roof pitch needed to a mere 10 percent or a 1 to 10 pitch.
Pergola s are thicker mounted on the shorter width and do not move.
Measure the area where you want to install the patio roof cover.
The existing slab can vary considerably throwing off crucial measurements.
Building on an existing deck.
Make the patio roof a little bit higher.