For the bottom measure up 27 inches 30 inches for the new window height 3 inches for the rough sill and mark the studs there.
Framing roof of boxed window.
Saw along the lines to open the roof photo 1.
Construct framed walls using advanced framing details like minimal framing at windows and doors to reduce thermal bridging and allow more space for insulation.
Modern bay windows or projecting windows are best as simple extruded boxes.
The side walls will rest on the new rafters and the front wall will rest on the attic floor.
Mark this point on the studs.
Measure for the top starting at the finished floor.
Add the header size the window jamb height 30 inches for the sill height and inch wiggle room.
Framing a roof is the last step in framing new construction.
Drive nails up through the roof at the corners.
While most home builders will outsource the construction of roofing trusses the rafter supports of the roof itself learning to frame a roof yourself is one of the true arts of carpentry and a basic primer is covered below.
To create a bay box bow window draw three or more additional walls to the size specification that you would like the window to be.
Once the additional walls are in place you will be able to add windows by selecting build window window from the menu and clicking in the wall where you would like to place the window.
Framing out the protrusion and then simply cladding it with the same window frame material is often the best and simplest solution.
Return to the roof remove shingles in the area and snap chalk lines between the protruding nail points.
Limit framing to a maximum of one pair of jack studs per window opening to support the header and window sill.