Flat Roof Framing Methods

Flat roofs are always built at a slight incline at least 1 8 inch per foot.

Flat roof framing methods. Two basic methods are used for framing a house. The flat roof is an architectural device that is loved by designers for its ability to create simplistic linear forms. Overhangs hips and dormers add greatly to the complexity of the framing. You can do this with a foam layer that exactly fits your roof.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. And the line length measurement from the roof peak to the building wall is the hypotenuse. Some roofs actually slope in several directions ensuring optimal water runoff. The run or half the building span is the base of the triangle.

When framing a flat roof you will need to create a slight incline. Platform construction is much more common than balloon framing though balloon framing was employed in many two story houses before 1930. Standard stick framing or the newer truss framing. Just enough slope to drain water but also flat enough to be a problem if not constructed properly.

The rise or height of the roof at its peak is the altitude of the triangle. This air is vented at either end of the roof to allow a continuous air flow. Adhesives may be useful in bonding the framing of the deck to the sub floor without creating holes. Platform and balloon frame construction.

Flat roof framing is relatively straightforward. In terms of rules on ventilation bs 5250. Which should be considered when investigating fixing methods. This will help you create a flat roof framing plan.

2x framing wood joists timber framing laminated beams steel concrete or sips. With platform frame construction shown below walls sit on top of subflooring. It can be framed like a floor system with horizontal framing members at 16 19 or 24 o c. Of course flat roofs are not flat but have a very slight roof pitch of between 1 4 to 1 2 per foot.

Depending on the span many different materials can frame a flat roof. Stick truss roof framing. 2011 control of condensation in buildings is the document to view. Roof framing can be simple or complex depending on the roof.

Put simply a warm flat roof has insulation of some kind packed into every available void and a cold flat roof allows air to circulate between the joists.