How To Build Sloped Roof 1 4 Over 12

Basically a slanted roof style is a flat roof tilted high up at one edge to create a very steep slope.

How to build sloped roof 1 4 over 12.

A low pitched roof would be 2 12 and it means that over the space of 12 inches the roof only rises two inches. For those who have a flat roof and are concerned about leaking and rotting building a sloped roof over the flat roof is an option. Simply locate a roof rafter board place the end of the level against the bottom edge and measure from the 12 inch mark vertically to the bottom edge of the rafter. Once you ve determined the measurements you need mark them directly onto a series of 2 in 5 1 cm x 4 in 10 cm or 2 in 5 1 cm x 6 in 15 cm boards using a carpenter s pencil.

A ratio is the most common way of expressing roof pitch or roof slope but degrees are also possible. A 4 12 pitch is around 18 5 degrees but not exactly. Significantly cheaper to build than a gable or multi slope roof since there s less material in the roof. The rafters on a steeply sloped roof for instance will be much longer and have more end cuts than those on a flat roof.

This will give you the rise over run or pitch. Thus a 4 12 pitch would be a 33 slope. Rain and snow which tend to congregate on flat roofs runs off a sloped roof keeping the lifespan of the roof and appearance intact. You can also divide the rise over run multiply by 100 and get a percentage.

Pitch ratios range from 2 12 to 12 12. The pitch of a roof is the rise the vertical angle of the roof over the run the horizontal measurement. It has a greater slope.