Flat Roof Deck Construction Details

The definition of a flat roof according to bs 6229 is having a pitch less than 10 o to the horizontal however some in the industry would consider up to 15 o as their definition of a flat roof.

Flat roof deck construction details.

Generally roofers discourage this method for cold climates because it can promote condensation and requires ventilating the roof which may be difficult to do in small or tight spaces. Of course you don t need to live in a modern house to deal with a flat roof. Construction studies drawing detail showing how to draw a flat roof warm deck construction detail to a scale of 1 10 with a short introduction highlighting t. Rooftop decks walk on roofs.

Depending on the type of roof you are considering here s some technical details you may find useful. These decks are often referred to as floating as they are not secured in place as a stand alone structure. To build a flat roof you ll want to have a thorough understanding of how the process of constructing the flat roof works and the different methods available. Careful detailing of membrane roofs at corners doorways and penetrations is critical for long term performance.

This article discusses rooftop deck construction details to avoid building leaks or rooftop deck safety hazards. Insulation for the warm flat roof only the basic construction process. If insulation is installed below the flat roof deck this is called a cold roof. First you must make sure the roof is strong enough to support 55 lbs per square foot.

Epdm is the best choice for most rooftop decks. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. Photo by dave holbrook. Some key details for a leakproof rooftop deck are.

A note to consider before construction. Building a deck over a flat roof is very similar to building a deck over a concrete patio. When building a flat roof it is vital that a degree of falls is built into the construction to ensure rainwater run off. That will help you remember certain factors and details to build the best possible flat roof.

Although flat roofs are cheaper to build than pitched roofs they have a shorter life span. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. Flat roof construction for residential. Yet for historic modern style buildings like this old house s cambridge tv project flat roofs are at the core of the architecture meant to reflect the broad horizontal lines of the natural landscape.

This is placed over the. Others would treat even steeper pitches as flat roofs. The roof deck surface should sloped away from the house a minimum 1 8 inch per foot so the water will.