Flat Roof To Pitched Roff

A pitched roof is more expensive.

Flat roof to pitched roff.

Most homeowners choose to convert a flat roof to a pitched one using a simple trussed roof with two angled planes. According to the international building code the typical built up flat roof that uses tar or asphalt goes by the guideline that for every foot 12 inches of a flat roof a minimum of inch must step up or down. This is the basis for calculating the angle which is approximately a 1 19 degree slope. Generally these roofs have a pitch from 1 2 12 to 2 12 from 4 2 to 16 7.

These are generally difficult in maintenance as they require special materials to avoid leaks. These roofs have a pitch less than 4 12. To get rid of ponding water problems. When it comes to the disadvantages some property owners are being pestered by leaks.

However flat roofs require much more aggressive and consistent maintenance than a pitched roof. You can tear off the existing roof remove the trusses and strengthen the joists. A 900 square foot flat roof in the san francisco area made of concrete tiles costs. If you have a high rise building converting your flat roof to a pitched one may not be applicable.

It is a significant renovation if you are converting from flat to pitched. Definition of roofs slopes flat roof a flat roof is defined by having a roof pitch below 15 degrees or a fall of 1 in 40 and can comprise of different products pitched roof a pitched roof is defined by having a roof pitch above 15 degrees or above fall of 1 in 40. Unlike sloped roofs flat roofs are susceptible to ponding water. Depending on the climate your flat roof will only last between 15 and 30 years if well maintained.

According to improve net s online roofing calculator a flat roof is significantly cheaper than a pitched roof. Generally such roofs have a pitch ranging from 1 2 12 to 2 12. Both your personal requirements and the needs of your property will sway your decision either way so it s vital to do your research first. Flat roofs are not perfectly flat in reality they need a small slope for water runoff.

This has to happen whether you re just removing the pitched roof or adding another floor with a flat roof. Low pitched roofs have the pitch below 4 12 33 3. Flat roofing systems come with benefits and drawbacks. There are a few ways to dealing with a pitched roof if you choose to convert to a flat roof.

While that s the easiest route it s certainly not your only option. Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks. Additional valleys angles and gables can be built into converted roofs as well but adding these elements may affect your project.