Flat Roof Deck Construction Details

We include walk on roof surfaces roofing membrane to use below a rooftop deck and construction of rooftop deck railings and posts.

Flat roof deck construction details.

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. Others would treat even steeper pitches as flat roofs. 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.

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

If insulation is installed below the flat roof deck this is called a cold roof. This is placed over the. Flat roof construction for residential. Depending on the type of roof you are considering here s some technical details you may find useful.

Insulation for the warm flat roof only the basic construction process. They are merely placed on top of another structure. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. Building a deck over a flat roof is very similar to building a deck over a concrete patio.

Although flat roofs are cheaper to build than pitched roofs they have a shorter life span. Careful detailing of membrane roofs at corners doorways and penetrations is critical for long term performance. Photo by dave holbrook. This article discusses rooftop deck construction details to avoid building leaks or rooftop deck safety hazards.

Of course you don t need to live in a modern house to deal with a flat roof. These decks are often referred to as floating as they are not secured in place as a stand alone structure. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. Some key details for a leakproof rooftop deck are.

Flat roof u value 0 18 w m2k 2 warm deck flat roof the type of insulation for this is usually of a rigid type and the thickness will vary depending on the manufacturer s specifications. 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. Epdm is the best choice for most rooftop decks.