Building Pitched Roof Over Flat Roof

According to improve net s online roofing calculator a flat roof is significantly cheaper than a pitched roof.

Building pitched roof over flat roof.

If you own a building with a flat roof the first thing your contractor will do is consult a structural engineer to make sure your structure can handle the conversion. Snow and rain which usually pile up on a flat roof run off the slanted roof thus prolonging the lifespan of the roof. When it comes to the disadvantages some property owners are being pestered by leaks. Pitched roofs are usually much heavier than flat roofs so an easy replacement may not always be possible.

A sloped roof is more capable of removing water from the building s exterior and can be an attractive alternative to. If you build and flash one right and keep it clean a good flat roof won t leak says toh general contractor tom silva who had seven different flat roofs. So i m thinking why don t i build a pitched roof on top of the flat roof. 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.

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. This new roof with a higher pitch can be accomplished with premade roof trusses and typical asphalt shingles. Fortunately modern materials for covering flat roofs have improved considerably over the past two decades. Building a pitched roof over an existing flat roof.

Discussion in building started by stephenstephen 11 may 2017. 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. 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. Unlike sloped roofs flat roofs are susceptible to ponding water.

A 900 square foot flat roof in the san francisco area made of concrete tiles costs. 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. If the structure contains windows then you ll need a low pitch for example. Some carry warranties of up to 20 years approaching those for sloped roofing.

Flat roofing systems come with benefits and drawbacks. Build pitched roof over flat roof. Extra costs to plan for in your flat roof conversion. 1 apr 2008 messages.

If excessive damage is present you might not be able to do this at all. To get rid of ponding water problems. The process of changing the pitch of your roof. For instance it may be difficult to build a large gable into a low pitched roof that you install above the flat roof surface.