Flat Roof Deck Construction Details

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.

Flat roof deck construction details.

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. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. Others would treat even steeper pitches as flat roofs.

Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. Rooftop decks walk on roofs. First you must make sure the roof is strong enough to support 55 lbs per square foot. These decks are often referred to as floating as they are not secured in place as a stand alone structure.

Epdm is the best choice for most rooftop decks. 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. Some key details for a leakproof rooftop deck are. If insulation is installed below the flat roof deck this is called a cold roof.

Careful detailing of membrane roofs at corners doorways and penetrations is critical for long term performance. Insulation for the warm flat roof only the basic construction process. Photo by dave holbrook. The roof deck surface should sloped away from the house a minimum 1 8 inch per foot so the water will.

This is placed over the. That will help you remember certain factors and details to build the best possible flat roof. 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. 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. Of course you don t need to live in a modern house to deal with a flat roof. 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. Depending on the type of roof you are considering here s some technical details you may find useful.

When building a flat roof it is vital that a degree of falls is built into the construction to ensure rainwater run off. They are merely placed on top of another structure. We include walk on roof surfaces roofing membrane to use below a rooftop deck and construction of rooftop deck railings and posts.