Flat Roof Framing Methods

2x framing wood joists timber framing laminated beams steel concrete or sips.

Flat roof framing methods.

When framing a flat roof you will need to create a slight incline. It can be framed like a floor system with horizontal framing members at 16 19 or 24 o c. Depending on the span many different materials can frame a flat roof. Two basic methods are used for framing a house.

Nearly all roofs are framed using one of two methods. Overhangs hips and dormers add greatly to the complexity of the framing. Just enough slope to drain water but also flat enough to be a problem if not constructed properly. 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.

The flat roof is an architectural device that is loved by designers for its ability to create simplistic linear forms. Which should be considered when investigating fixing methods. Flat roof framing is relatively straightforward. Roof framing can be simple or complex depending on the roof.

And the line length measurement from the roof peak to the building wall is the hypotenuse. 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. You can do this with a foam layer that exactly fits your roof. Platform and balloon frame construction.

Some roofs actually slope in several directions ensuring optimal water runoff. In terms of rules on ventilation bs 5250. Framing a roof is the last step in framing new construction. This will help you create a flat roof framing plan.

Of course flat roofs are not flat but have a very slight roof pitch of between 1 4 to 1 2 per foot. Stick truss roof framing. Adhesives may be useful in bonding the framing of the deck to the sub floor without creating holes. Flat roofs are always built at a slight incline at least 1 8 inch per foot.

2011 control of condensation in buildings is the document to view. Platform construction is much more common than balloon framing though balloon framing was employed in many two story houses before 1930. With platform frame construction shown below walls sit on top of subflooring. The rise or height of the roof at its peak is the altitude of the triangle.

Standard stick framing or the newer truss framing.