Flat roofs are about 10 20 more expensive to install than a pitched roof after the conversion.
Replace flat roof with pitched.
Unlike sloped roofs flat roofs are susceptible to ponding water.
A flat roof is easily replaced by a one way slope or shed roof.
This is because the membrane is more expensive to manufacture as well as the need for more specialized labor.
Installing a shallow pitched roof over your existing flat roof.
You can tear off the existing roof remove the trusses and strengthen the joists.
Flat roofing systems come with benefits and drawbacks.
They last 25 50 years while a flat roof membrane will last about 15 20 years.
The structure does not need to be reinforced and the surface area is not that much greater for a shallow sloped shed roof.
Flat roofs also don t last as long.
Lay down the square folded epdm material in the center of your flat roof.
There are a few ways in which you can go about the replacement including.
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.
Determine the slope of the roof.
A pitched roof is more expensive.
Building a new floor and installing the pitched roof above that.
Adding a trussed style roof.
Afterward flip the next topmost piece upward.
Align the bottom so its parallel to the bottom length of the roof.
This has to happen whether you re just removing the pitched roof or adding another floor with a flat roof.
When it comes to the disadvantages some property owners are being pestered by leaks.
Roofs with a slope of 1 to 3 inches of fall to 12 inches of run should use rolled roofing.
Flip the topmost piece of the epdm material downward across the length of the roof.
According to improve net s online roofing calculator a flat roof is significantly cheaper than a pitched roof.
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.
Pitched roofs have about a 40 longer life than flat roofs.
Additional valleys angles and gables can be built into converted roofs as well but adding these elements may affect your project.
Open the epdm square vertically along the length of the roof.
To get rid of ponding water problems.
However flat roofs require much more aggressive and consistent maintenance than a pitched roof.