Warm Flat Roof Construction Details Building Regulations

Warm deck sandwich or cold deck.

Warm flat roof construction details building regulations. Cold deck this is where the insulation is placed between the joists rafters or in between the ceiling joists in the case of a pitch roof. Although flat roofs. If you have an existing cold roof in need of refurbishment it should be converted to a warm roof see sketch 1 to meet part l of the building regulations. That will help you remember certain factors and details to build the best possible flat roof.

4 essentials for a successful flat roof like any part of a building s exterior flat roofs should be constructed to withstand natural and human forces with the minimum of attention. There should be no insulation below the deck and no ventilation is required. When building a flat roof it is vital that a degree of falls is built into the construction to ensure rainwater run off. A flat roof must be strong durable and stable throughout its lifetime.

The building regulations in the uk provide guidance on roof design. Types of flat roof construction warm and cold flat roofs. Flat roof types. Make sure your comply with flat roof building regulations.

Having a manual for warm flat roof construction with details and a summary of rules to follow helps. These things will affect the timing cost and overall running of your project. Sometimes the excitement of starting a new construction project or building venture can lead you to forget about the finer details such as planning permission and local building regulations. 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. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. There are two ways to insulate a roof. Flat roof details and information relating to insulating a flat roof.

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 construction can come in the form of a warm roof or cold roof depending on the requirement of the owner and architect as they relate to the building regulations regarding heat loss and insulation. It must provide adequate protection against the elements keeping the buildings structure and interior dry. Warm deck this is where the insulation is placed on top of the rafters joists and the roof covering is then placed over the insulation.

Flat roofs there are two common forms of construction for flat roofs. No ventilation is required for these types of roofs. A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less. Flat roof this usually consists of felting which has a slight fall to allow rain water to drain off.

Details both in 2d and 3d to give a clear understanding.