How To Build A Sloped Roof Over A Flat 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.

How to build a sloped roof over a flat roof.

The slope on a flat roof is too small to shed water and the shallow slope tends to collect leaves and debris that act like dams. 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. 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.

Flat roofing systems come with benefits and drawbacks. Of course you don t need to live in a modern house to deal with a flat roof. A sloped roof is a great way to prevent water from puddling on your 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.

Eventually water penetrates the building. 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. Significantly cheaper to build than a gable or multi slope roof since there s less material in the 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. If your pergola roof has a slope or is attached to the house the direction of the panels is determined for you. Skillion roofs are one of the simplest roof styles used in shed building. Unlike sloped roofs flat roofs are susceptible to ponding water.

Because the gutter is removed you will need to install transfer flashing from the roof of the house to the patio. To put it in perspective the angle of this slope would be around 30 degrees. Make the patio roof a little bit higher. When it comes to the disadvantages some property owners are being pestered by leaks.

This means that the rise of the slope goes up or down 8 inches for every 12 inches. It has a greater slope. It s similar to a shed or lean to roof or a clerestory roof but has one visible difference. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof.

However if you have a free standing pergola with a flat roof like mine you need to decide which way the grooves will go. A skillion roof is made up of a single flat plane which slopes gradually from top to bottom.