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.
Flat to pitched roof.
This is the basis for calculating the angle which is approximately a 1 19 degree slope.
If you have a high rise building converting your flat roof to a pitched one may not be applicable.
Flat roofs also don t last as long.
Most homeowners choose to convert a flat roof to a pitched one using a simple trussed roof with two angled planes.
To get rid of ponding water problems.
Depending on the climate your flat roof will only last between 15 and 30 years if well maintained.
This is because it is a more complex design than a flat roof that requires increased labour and additional materials.
Is a flat roof going to cause me problems.
Pitched roofs look very out of.
You can tear off the existing roof remove the trusses and strengthen the joists.
According to improve net s online roofing calculator a flat roof is significantly cheaper than a pitched roof.
Flat roofs are more common for commercial buildings and while not as architecturally beautiful as a pitched roof can also be used for residential buildings.
People generally tend to prefer the style of a pitched roof especially on residential structures.
A pitched roof is more expensive.
Aesthetics are a real consideration here.
Flat roofing systems come with benefits and drawbacks.
When it comes to the disadvantages some property owners are being pestered by leaks.
It s all in what you want from your roof.
Pitched roofs last substantially longer in most climates.
While that s the easiest route it s certainly not your only option.
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.
However flat roofs require much more aggressive and consistent maintenance than a pitched roof.
Unlike sloped roofs flat roofs are susceptible to ponding water.
There are a few ways to dealing with a pitched roof if you choose to convert to a flat roof.
Advantages to pitched roofs over flat roofs.
First of all a flat nay or may not be actually flat.
It is a significant renovation if you are converting from flat to pitched.
However in exchange for the added expense you will receive a roof that boasts a longer lifespan thoroughly effective water drainage and a more.
However do take the architecture of your home into consideration.
Additional valleys angles and gables can be built into converted roofs as well but adding these elements may affect your project.
A 900 square foot flat roof in the san francisco area made of concrete tiles costs.