This is a test of commonsense. Complete the next sentence:

How to frame a dormer
Schedule your project considering that the roof will be wide open and the work may last an entire day.
Create a layout that incorporates the details of the project such as slope, headroom and exterior appearance.
Purchase your materials, including wood, windows and any other specialty items.
Arrange for delivery of the materials as well as an industrial trash receptacle for the scraps. Acquire a heavy-duty tarp that is large enough to entirely cover the roof.