Flat Roof Framing Methods

This air is vented at either end of the roof to allow a continuous air flow.

Flat roof framing methods.

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. 2011 control of condensation in buildings is the document to view. Roof framing can be simple or complex depending on the roof.

Flat roof framing is relatively straightforward. Which should be considered when investigating fixing methods. When framing a flat roof you will need to create a slight incline. Nearly all roofs are framed using one of two methods.

Adhesives may be useful in bonding the framing of the deck to the sub floor without creating holes. The flat roof is an architectural device that is loved by designers for its ability to create simplistic linear forms. 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. Overhangs hips and dormers add greatly to the complexity of the framing.

Depending on the span many different materials can frame a flat roof. Flat roofs are always built at a slight incline at least 1 8 inch per foot. Platform construction is much more common than balloon framing though balloon framing was employed in many two story houses before 1930. The rise or height of the roof at its peak is the altitude of the triangle.

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

2x framing wood joists timber framing laminated beams steel concrete or sips. Two basic methods are used for framing a house. It can be framed like a floor system with horizontal framing members at 16 19 or 24 o c. 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.

Platform and balloon frame construction. With platform frame construction shown below walls sit on top of subflooring. In terms of rules on ventilation bs 5250. This will help you create a flat roof framing plan.

Framing a roof is the last step in framing new construction.