Framing A Pitched Roof Over A Flat Roof

Snow and rain which usually pile up on a flat roof run off the slanted roof thus prolonging the lifespan of the roof.

Framing a pitched roof over a flat roof.

Of course you don t need to live in a modern house to deal with a flat roof. Created with wondershare filmora. Pitch also has its own denotation determined by the rise in inches in 12 inches. Additional valleys angles and gables can be built into converted roofs as well but adding these elements may affect your project.

Pitch for a gable roof the most common is generally 1 4 or 1 3. Using a pitch measuring tool that i d made we also determined that the exact pitch of the shed roof was 3 1 2 in 12. Slanted roofs which come with 2 angles meeting in the center are known as pitched roofs while the ones with a single slant are known as skillion roofs. For instance a 4 12 pitch denotes.

To keep the porch roof framing as simple as possible we installed a structural ridge supported by posts at each end with the common rafters landing on top of the ridge. Pitch can vary a great deal from a shallow slope up to a very steep pitch. If the structure contains windows then you ll need a low pitch for example. Which is equal to 1 4 or 1 3 the total span of the building not counting any overhang.

Replacing a roof can be expensive but if a roof contains only a small slope it s possible to raise the roof pitch of a house by building a roof over the old one. This is part two of the porch build where i am doing the roof. Yet for historic modern style buildings like this old house s cambridge tv project flat roofs are at the core of the architecture meant to reflect the broad horizontal lines of the natural landscape. I show how i construct it showning in detail how to do the lead flashing.

Blind valleys simplify framing. Most homeowners choose to convert a flat roof to a pitched one using a simple trussed roof with two angled planes. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. According to improve net s online roofing calculator a flat roof is significantly cheaper than a pitched roof.

While that s the easiest route it s certainly not your only option.