Flat Roof With Overhangdetails

For example 4 12 pitch means 4 inches of rise in 12 inches of run.

Flat roof with overhangdetails.

The exposed timber rafters and decking are susceptible to ignition and embers and hot gases can enter the attic through. 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. Overhangs are common in most house designs providing protection against both wind and rain. Metal panels untreated wood panels and vinyl attic vents figure 1.

The siding underneath the overhang is known as the soffit. Metal roofs also require particular attention especially the length of flat metal roofs. Roof overhangs are the amount that the roof hangs over the top of the siding in residential home construction. The vertical rise of the top chord per 12 horizontal inches is the roof pitch or slope.

The tradeoff between solar heat gain and shading. The steeper the roof the more expensive the trusses get because the longer the boards get and the more roof area increases. Figures 9 7 and 9 8 show some conditions commonly encountered. Metal roofing can be used on any pitch or slope of roof.

Chapter 9 2 wood. But are they really necessary. 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. To these roofs and adjacent wood construc tion.

Roof overhangs at the eaves and rakes protect the walls below from rain and sun. Soffits are commonly constructed from fiber cement panels metal panels stucco vinyl panels or wood sheathing. If the wind is. Other roof protrustions sothat notiiing obstructs tiieflow ofair from eave to ridge.

For homes built in the northern hemisphere i e. Corrugated panels are more prone to bend under heavy snow loads. 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.