Roof Eaves Dimension

Steeper sloped roofs are considered more aesthetically pleasing and last longer.

Roof eaves dimension.

Rl roof length dimension of the roof from one gable end of the building to the other. The eaves are the edges of the roof which overhang the face of a wall and normally project beyond the side of a building. An eave is the edge of the roof that overhangs the face of a wall and normally projects beyond the side of a building. The eaves form an overhang to throw water clear of the walls and may be highly decorated as part of an architectural style such as the chinese dougong bracket systems.

A 12 in 12 roof can cost up to 50 more than a 4 in 12 roof. Rl is simply the building width plus the amount of overhang at the two gable ends of the building. Overhangs are common in most house designs providing protection against both wind and rain. Rw roof width dimension a in my sketch at left.

Shingle roofs typically have a life span of 15 30 years while membrane roofs usually last 5 15 years. It is often compared to slope but is not exactly the same. Roof pitch refers to the amount of rise a roof has compared to the horizontal measurement of the roof called the run. They also help to frame windows on upper stories.

Some roofers install a layer of waterproof shingle underlayment wsu over the existing shingles at the eave end as would be done for a roof laid on bare sheathing. Although ceramic tile roofs are expensive they can have a life span of over 100 years. Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run. Anything more than 9 in 12 is considered steep.

Roof overhangs are the amount that the roof hangs over the top of the siding in residential home construction. Remember to include in a the amount by which the roof extends out over the building walls its eaves. Eaves form the overhang to distribute water clear of the walls. Conventional slope roof range between 4 in 12 and 8 in 12.

A low slope roof is anywhere from 2 in 12 to 4 in 12. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. However there is also an architectural purpose to them. This provides added protection against ice dams.

That is their functional purpose.