Framing Angled Attic

The rise or height of the roof at its peak is the altitude of the triangle.

Framing angled attic.

And the line length measurement from the roof peak to the building wall is the hypotenuse. Run the plywood down to the top of the knee wall. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. If you want your attic space to have a flat ceiling you ll need to add collar ties to the framing.

Then add the 2 4 side walls and the roof slope using a square. 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. Collar ties are horizontal members that like rafter ties extend from rafter to rafter but. Begin with a baseline and snap a center line perpendicular to it.

The plywood will create a smooth strong ceiling without having to apply drywall tape and mud to the ceiling. 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. Use the 3 4 5 triangle method to make the 90 degree angle. The run or half the building span is the base of the triangle.

The central angle for an octagon roof is 45. One half of 45 is 22 5. However the wall must be built 1 4 inch shorter than.