Flat Roof With Overhangdetails

The vertical rise of the top chord per 12 horizontal inches is the roof pitch or slope.

Flat roof with overhangdetails.

The steeper the roof the more expensive the trusses get because the longer the boards get and the more roof area increases. For homes built in the northern hemisphere i e. The exposed timber rafters and decking are susceptible to ignition and embers and hot gases can enter the attic through. Other roof protrustions sothat notiiing obstructs tiieflow ofair from eave to ridge.

But are they really necessary. The membrane proper must be kept in an unbroached condition with all edge conditions either above scupper or drain height until water runoff is complete. The national roofing contractors association recommends structural panels for flat or low slope roofs but corrugated panels are used in some areas with no heavy snow. Figures 9 7 and 9 8 show some conditions commonly encountered.

Corrugated panels are more prone to bend under heavy snow loads. The siding underneath the overhang is known as the soffit. The tradeoff between solar heat gain and shading. Metal panels untreated wood panels and vinyl attic vents figure 1.

America and canada the most important windows and doors to keep in mind for any roof strategy are the south windows. With composite siding such as boral s truexterior siding over a ventilated rain screen and with properly executed flashing at the windows and doors the walls on the fhb house will be able to handle rain just fine. Roof overhangs at the eaves and rakes protect the walls below from rain and sun. Chapter 9 2 wood.

For example 4 12 pitch means 4 inches of rise in 12 inches of run. Overhangs are common in most house designs providing protection against both wind and rain. Metal roofs also require particular attention especially the length of flat metal roofs. Metal roofing can be used on any pitch or slope of roof.

Roof overhangs are the amount that the roof hangs over the top of the siding in residential home construction. Soffits are commonly constructed from fiber cement panels metal panels stucco vinyl panels or wood sheathing. You will also incur additional costs because.