Framing A Pitched Roof Over A Flat Roof

Chapter 8 includes specifics for such things as allowable lumber to use the moisture content of fire retardant treated wood allowable rafter spans and use of.

Framing a pitched roof over a flat roof.

A common house roof pitch is 5 by 12 which means it slopes up from the wall at 5 inches per foot. You ll have to find the secondary roof hip pitch the same way you found the main roof hip pitch as in figure 3b. Of course you don t need to live in a modern house to deal with a flat roof. If the structure contains windows then you ll need a low pitch for example.

This is a completion video of a flat roof framing. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. Repeat the same procedure on the side of the hip that faces the secondary roof using the hip pitch for that roof and measuring distance b. If you re adding to the gable end of the house the side wall that goes up to the roof s peak it s fairly easy to extend the existing roofline over the new space says curt schultz a realtor architect builder in pasadena calif.

Premade trusses will form the skeleton of your new roof above your old roof. Make sure the pitch of the trusses is the pitch that you want for your new roof. This is a completion video of a flat roof framing. That s a simple low cost solution that can tie in well with the main house.

The hip pitch in relation to the secondary roof measures out at 9 5 8 18 13 16. These requirements cover the design and construction of roof ceiling systems including roof framing roof drainage roof sheathing ceiling finishes roof ventilation and attic access. Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option. If excessive damage is present you might not be able to do this at all.