How To Frame Flat Roof

The reason we included this section is to give you a good idea of how to build a sloped roof over a flat roof.

How to frame flat roof. Lean to shed roof framing. How to make a flat roof have a pitch general steps obviously you shouldn t do the work all by yourself. That way you know the process. Some roofs actually slope in several directions ensuring optimal water runoff.

Flat roofs are always built at a slight incline at least 1 8 inch per foot. Then gather your measurements by calculating the run rise and length of each rafter segment in feet and the pitch of your roof in inches. And the line length measurement from the roof peak to the building wall is the hypotenuse. The high end of the rafter sits on or attaches to a ledger plate attached to the existing wall.

The lower end is done the same way a skillion or shed roof is. At inside vertical corners tom cuts and overlaps the epdm then uses rubber adhesive to glue it down tightly. Position the fascia board flat against the ends of the beams with the upper edge even with the upper edges of the beams. You can also use the knowledge you gain to evaluate prospective roofing contractors.

This flat roof covering can be roofing felt usually 3 layers with a mineral chipping topping to soak up the heat of the sun which protects the felt from both melting and breakdown under uv rays. Another possibility is to cut a fall into the roof insulation something several businesses now offer it s often referred to as tapered insulation. Notch a birdsmouth where it sits on the low wall and extend it past the wall for the eaves. The rise or height of the roof at its peak is the altitude of the triangle.

To keep the vertical sections from peeling off the walls tom screws on metal brackets called termination stops then cuts off the excess above the brackets. You can do this with a foam layer that exactly fits your roof. This ethylene propylene diene monomer rubber covering is very versatile long lasting and very strong. A far more common method is to use firring strips which are battens cut at an angle and placed on top of the roof joists.

To frame a roof start by choosing a roof style like a frame or gabled. He also seals this seam with uncured rubber. Cut a piece of two by eight framing lumber to length as a fascia board. When framing a flat roof you will need to create a slight incline.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. The run or half the building span is the base of the triangle.