Building Pitched Roof Over Flat Roof

Robin is working on an extension so we thought we d shadow him for the day and see how he creates a pitched roof or semi pitched roof leading up to a flat.

Building pitched roof over flat roof.

Building a pitched roof over an existing flat roof. However in exchange for the added expense you will receive a roof that boasts a longer lifespan thoroughly effective water drainage and a more. Replacing a roof can be expensive but if a roof contains only a small slope it s possible to raise the roof pitch of a house by building a roof over the old one. If you have a high rise building converting your flat roof to a pitched one may not be applicable.

For instance it may be difficult to build a large gable into a low pitched roof that you install above the flat roof surface. This new roof with a higher pitch can be accomplished with premade roof trusses and typical asphalt shingles. Always make sure your design gets an okay from an engineer or architect someone who can sign off on the structural integrity before making changes. Unlike sloped roofs flat roofs are susceptible to ponding water.

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. The flat roof typifies modern and contemporary architecture however a flat roof is prone to leak. Pitched roofs cost more than a flat roof and also take longer to install.

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. A sloped roof is more capable of removing water from the building s exterior and can be an attractive alternative to. To get rid of ponding water problems. Slanted roofs which come with 2 angles meeting in the center are known as pitched roofs while the ones with a single slant are known as skillion roofs.

If the structure contains windows then you ll need a low pitch for example. It depends on a lot of variables like the condition of the existing flat roof including the state of the joints and the material its made of. Flat roofing systems come with benefits and drawbacks. Snow and rain which usually pile up on a flat roof run off the slanted roof thus prolonging the lifespan of the roof.