Flat Roof Framing Methods

When framing a flat roof you will need to create a slight incline.

Flat roof framing methods.

The flat roof is an architectural device that is loved by designers for its ability to create simplistic linear forms. Nearly all roofs are framed using one of two methods. You can do this with a foam layer that exactly fits your roof. The run or half the building span is the base of the triangle.

Of course flat roofs are not flat but have a very slight roof pitch of between 1 4 to 1 2 per foot. Flat roofs are always built at a slight incline at least 1 8 inch per foot. 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.

2011 control of condensation in buildings is the document to view. It can be framed like a floor system with horizontal framing members at 16 19 or 24 o c. Flat roof framing is relatively straightforward. Framing a roof is the last step in framing new construction.

This air is vented at either end of the roof to allow a continuous air flow. Some roofs actually slope in several directions ensuring optimal water runoff. In terms of rules on ventilation bs 5250. This will help you create a flat roof framing plan.

Adhesives may be useful in bonding the framing of the deck to the sub floor without creating holes. 2x framing wood joists timber framing laminated beams steel concrete or sips. Depending on the span many different materials can frame a flat roof. Standard stick framing or the newer truss framing.

Overhangs hips and dormers add greatly to the complexity of the framing. Which should be considered when investigating fixing methods. The rise or height of the roof at its peak is the altitude of the triangle. Stick truss roof framing.

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. Platform and balloon frame construction. Two basic methods are used for framing a house.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.