Flat Roof Residential Roof Deck Design

If it goes just a fraction under you cannot use shingles so there are several choices you might have in terms of flat roofing materials but it has to be what you would call waterproof in a sense.

Flat roof residential roof deck design. You can go for an extended roof that covers a few feet outside the external walls of the house. Some local codes take it a step further allowing a slope of only of an inch per foot. From there the flat roof system you choose will determine the materials you apply. There is no great architectural splendour in these roofs.

Most roof decks leak because they are typically made of flat roofing materials that were created over a century ago and were not designed for use as roofing for residential homes and living areas. Another reason is the original design flaw implemented by architects andor builders who have no experience in flat roofing and do not have appropriate roofing technology to use. There are a few things that make pvc decking different in regards to roof decks. Building a deck over a flat roof is very similar to building a deck over a concrete patio.

Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board. According to the international code council the minimum slope for water runoff is inch per 12 inches. Flat roof designs are quite common in residential buildings. Flat roofs are typically designed with a pitch of 10 degrees or less.

Most residential flat roofs are going to be about a 112 pitch and on that you can use a cold adhesive modified application. Many slope in several directions like squashed hip roofs toward scupper holes that connect to downspouts. Flat garage roof design. The building code does not allow shingles below a 212 pitch so at 212 you can still use a shingle.

First you must make sure the roof is strong enough to support 55 lbs per square foot. The most important thing to know about a flat roof says tom is that its not flat to prevent water from pooling and eventually invading the home flat roofs are always built on a slight inclineat least 18 inch per foot. They are merely placed on top of another structure. These decks are often referred to as floating as they are not secured in place as a stand alone structure.