Framing Angled Attic

Use screws to attach sheets of birch plywood to the angled ceiling over the insulation making sure to drive the screws into the ceiling joists.

Framing angled attic.

Run the plywood down to the top of the knee wall. However the wall must be built 1 4 inch shorter than. One half of 45 is 22 5. And the line length measurement from the roof peak to the building wall is the hypotenuse.

The central angle for an octagon roof is 45. Use the 3 4 5 triangle method to make the 90 degree angle. Then add the 2 4 side walls and the roof slope using a square. The easiest method of framing a wall is to build it on the floor and erect it ensuring it s plumb straight up and down before securing.

The plywood will create a smooth strong ceiling without having to apply drywall tape and mud to the ceiling. Eliminate guesswork make a full size drawing of the gable wall on the floor of your garage or attic. Collar ties are horizontal members that like rafter ties extend from rafter to rafter but. If you want your attic space to have a flat ceiling you ll need to add collar ties to the framing.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. The run or half the building span is the base of the triangle. Begin with a baseline and snap a center line perpendicular to it.