In the us the slope of the roof is typically expressed as a ratio rise in run or rise run which by general agreement in the us roofing industry always uses 12 inches as the run and states how many inches the roof rises vertically for every 12 inches the roof goes across horizontally sloped roofs commonly have slopes like 6 in 12 6 12 or 8 12.
Picture of left slope of roof.
Roof terminology is also not rigidly defined.
Usages vary slightly from region to region or from one builder or architect to another.
Why do we design this way.
See more ideas about modern house house house design.
Our approach in north america is to use a metal roof with a steep slope that will allow the snow and ice to slide off.
As i design roofs today in ski resort areas i use one of the above types of roofs and plan to keep the snow on.
When matched to the angle and proportions of other rooflines on the house your gable roof will add visual interest and character to the home making the addition look like an asset that belongs with the house.
The primary reason is a fear of having the building collapse under a heavy snow load.
The main factors which influence the shape of roofs are the climate and the materials available for roof structure and the outer covering.
May 23 2019 explore tony li s board modern house with slope roof on pinterest.
Open valleys have metal flashing to protect this critical area of the roof.
The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7.
Roof shapes differ greatly from region to region.
The hip roof is the most commonly used roof style in north america after the gabled roof.
Rather than a single slope a gable roof consists of two slopes that meet at a peak running down the middle of the roof.
If you are trying to see a good close in satellite image of the roof on a specific building see roof online s page how to find a building on google earth and see a good close up of the roof.
A hip roof or a hipped roof is a style of roofing that slopes downwards from all sides to the walls and hence has no vertical sides.
This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.