Framing And Roof Crickets

In this example a pitch of 12 12 and 1 1 2 x 5 1 2 rafters are specified.

Framing and roof crickets.

Always frame the cricket at the same pitch as the roof and you will be within code guidelines. Here the build roof dialog is being used to set the defaults for manually drawn roof planes. Secure the plywood triangles to the roof decking and cricket ridge with galvanized screws. Select build roof build roof from the menu and in the build roof dialog specify the pitch framing and any other attributes that you will need for the cricket.

Install a waterproof membrane over the cricket sides and edges fastened to the cricket with a construction stapler. Put metal flashing along the sides of the cricket nailed in place to overlap seams with the roof. This is the number which we will use to lay out our rafter for the cricket. 2x8 sleepers should be nailed to the roof surface to pick up the ends of the rafters.

This beam will provide the backbone for the cricket or saddle. You will need to use compound miter cuts for the cricket rafters. Ok so a four foot wide chimney has a span of 4 foot and half of that is the run which is 2 foot.