Wood Frame Flat Roof Assembly

This will help you create a flat roof framing plan.

Wood frame flat roof assembly.

From there the flat roof system you choose will determine the materials you apply. If less analysis is required. Hi i m an architect looking for advice as to how to detail a wood frame flat roof parapet wall assembly. By flat i mean one one that is sloped to drain and either is topped with a built up roof membrane or a single ply membrane.

I looked for one on this website and there isn t one. R value of ccspf to be 40 of total assembly. When framing a flat roof you will need to create a slight incline. At the highest point of the sloped roof the parapet is about 10 tall at the lowest point the parapet is about 14 tall.

Other flat roof components underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board. Acceptable if above is not feasible. You can do this with a foam layer that exactly fits your roof. 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.

6 4 flat roof assemblies before constructing a flat roof assembly please refer to the unvented roof assembly comments under 6 2 vented and unvented roof assemblies and if applicable 6 3 parapet walls. The parapet itself is standard wood framing with an applied siding in this case t g 1 4 cedar. Closed cell spray polyurethane foam ccspf at bottom of roof sheathing. Roof sheathing to be air sealed.

Wood framed sloped roofs have been a common means to provide shelter and protection from the weather for centuries but high performance building enclosures often focus on wall designs rather than roof designs. Ci to be installed in multiple layers to limit insulation by pass from gapping of insulation. To frame a roof start by choosing a roof style like a frame or gabled. Some roofs actually slope in several directions ensuring optimal water runoff.

This is located in a mixed climate northern california. The assembly is straight forward but what complicates matters is that the roof needs to be vented.