Note: this is the standard (ft and inch) version. For the metric version click here
The roof is a 45° pitched hip roof with a dormer. It is constructed from 1/2" MDF board, all except for the eaves (the underside of the overhang at the bottom of the roof), which is constructed from ¾" x 2 ½" and ¾" x ¾" wood.
Step 1. The eave soffit
Out of ¾" x 2 ½" wood, cut two pieces 29" long with a 45° miter at each end. Also cut two pieces 14¼ long with a 45° miter at each end.
Then glue and nail the four pieces together in 'picture frame' style.
Fix some temporary blocks around the perimeter to hold it all in place.
Step 2. The frieze board
The frieze board is the bit that runs around the underside of the roof and encircles the house walls.
To fix the frieze board to the soffit, cut to length, and glue and nail ¾" x ¾" wood on top of the soffit ('picture frame'), 2" in from the edge, all the way around.
Step 3. Preparing for the roof
When the glue has dried, turn the eave unit over so it is actually the right way up.
Fix some temporary wood pieces around the outside of the eave unit ('picture frame').
This is to hold the pitched roof pieces in place until the glue dries.