How To Build A Sloped Roof Over A Flat Roof

Rain and snow which tend to congregate on flat roofs runs off a sloped roof keeping the lifespan of the roof and appearance intact.

How to build a sloped roof over a flat roof.

It is almost similar to the first method but to make the patio roof a little bit higher you will need to remove the house gutter and place the back channel a bit higher. Basically a slanted roof style is a flat roof tilted high up at one edge to create a very steep slope. An example for a steep sloped roof is 8 12. Because the gutter is removed you will need to install transfer flashing from the roof of the house to the patio.

A skillion roof is made up of a single flat plane which slopes gradually from top to bottom. Flat roofing systems come with benefits and drawbacks. If your pergola roof has a slope or is attached to the house the direction of the panels is determined for you. Significantly cheaper to build than a gable or multi slope roof since there s less material in the roof.

Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. The grooves need to point downhill and away from the house. Of course you don t need to live in a modern house to deal with a flat 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.

To put it in perspective the angle of this slope would be around 30 degrees. Water that stays on a flat roof after it rains will weaken the material over time. However if you have a free standing pergola with a flat roof like mine you need to decide which way the grooves will go. The slope of a roof or pitch is determined by how many inches the roof rises over 1 foot or 12 inches.

Saltbox roofs look like skillion roofs but with an extra short slope opposite the long angled plane like an upside down check mark. Eventually water penetrates the building. A sloped roof is a great way to prevent water from puddling on your roof. A sloped roof is more capable of removing water from the building s exterior and can be an attractive alternative to the flat roof.

It s similar to a shed or lean to roof or a clerestory roof but has one visible difference. When it comes to the disadvantages some property owners are being pestered by leaks. Unlike sloped roofs flat roofs are susceptible to ponding water. 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.

Make the patio roof a little bit higher. This means that the rise of the slope goes up or down 8 inches for every 12 inches.