How to Build a Mansard Roof
Step 1: The frame of the Mansard roof is created by a series of vertical four-by-four beams that intersect at right angles.
Step 2: The next step is to construct the outer walls. As you create the outer wall of a Mansard roof, place a beam at the top corner first and anchor it with another beam. Then build another beam about 2 inches higher than the one we mentioned above. Anchor that one too.
Step 3: After this, put the second course on the oblique line from the corner of the outer wall. This means that the second beam you build will be rested at a 45-degree angle on top of its twin. Then nail it to the first one.
Step 4: Repeat the same process as you construct the third beam but don’t forget to put one more beam one inch lower than a second beam, which will be resting on this one.
Step 5: As you place the next course, remember to adjust the angle of the beam by adding or removing a beam at the top corner.
Step 6: The inner walls are going to be created next. The first beam put together with its mate will be resting on top of the second beam that bears a 45-degree angle.
Step 7: When you build the wall of the Mansard roof, do not forget to adjust its angle just as you did when building its outer wall.
