How To Over Framing Roof

If the unit of rise in inches is 3 then the cut is the unit of rise and the unit of run 12 inches or 3 12.

How to over framing roof. Input the pitch of the roof that you calculated above we ll use 7 12 for reference throughout on the framing square. Nearly all roofs are framed using one of two methods. To provide a framework for the new trusses nail 2 by 6 inch strips of wood around the perimeter of the roof. The pitch of the roof refers to the angle or steepness of the roofing frame.

From one end of the rafter material using a speed square or framing square mark an x in 12 angle on the rafter and cut it. Add the length of the overhang beyond this mark and. Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge. No matter which kind of roof framing is used they both contain one element that you ll need to be familiar with and that s the pitch of the roof.

Along the level line and using a square to draw a perpendicular line up to the roof edge of the board. Figure 2 2 roof framing terms. Line up the square with the pitch end of the chord and mark the line with a pencil. Or if you want to raise the roof a bit more install fascia around the roof perimeter attached to the new soffit and nail the new roof deck to crown molding above the fascia.

So if the pitch of your roof is 7 12 place one stair gauge on the vertical part of the framing square the tongue at the 7 inches 18 cm mark and place one stair gauge on the horizontal part of the framing square the body at the 12 inches 30 cm mark. Measure down y height from the long point of the rafter cut and make a mark. Make a simple rafter jig if the slope of your dormer roof is the same as your old roof hold a scrap of plywood against the old roof boards and draw a level line on it. Measure out each plumb cut.

This will give the framing square the angle you need to make the ridge cut. Make a rafter cutting jig by measuring 12 in. Line length is the hyptenuse of the triangle whose. Roof framing can be simple or complex depending on the roof.

Roof framing rafter layout. Over framing is when you frame a roof section on top of another roof section such as when joining a l shaped roof with each section at right angles to each other etc. Some carpenters like to make this. Standard stick framing or the newer truss framing.

Stick truss roof framing. This process uses pre built wood forms to build the roof frame. Position the square at the end of the rafter board with the tongue on your left and facing away from you. Below is a link to a roof plan with a section that is over framed see note 3.