Flat Lead Roof Construction

The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls.

Flat lead roof construction.

A roof is part of the building envelope. Our basic fitting guides are designed to assist installing rolled lead sheet in a range of roofing applications including flashings valleys gutters and flat roofing. The characteristics of a roof are dependent upon the purpose of the building that it covers the available roofing. Having a manual for warm flat roof construction with details and a summary of rules to follow helps.

Traditional lead roof coverings are normally weathertight but not watertight. When a hot roof surface is suddenly cooled by rain the pressure in. For additional stability you can also use steel joists that are built into one or both of the walls. As you may imagine there is a fair amount of weight involved here in terms of boards felt etc.

So any timber joists that are used need to be strong enough to support this weight. Sizes of joists needed for flat roof construction. A new lead bay fitted in a simple one piece bay like this one the lead is nailed into the upstand underneath the guttering the drip is then beaten nice and tight over the edge of the roof and trimmed to about 50mm. Used to join lead together into smaller pieces reduce expansion and contraction issues create up stands and troughs provide.

Lead bay roofs are even more expensive starting from. In general a warm roof is preferable from a construction angle but it does lead to a higher roof profile which isn t always acceptable from a planning perspective there a number of variations of the warm roof referred to as hybrid roofs which introduce different elements. Old asbestos roofs are often replaced with flat roofs. Correctly laid lead roof greyfriars roofing note the height of steps between bays the rolled joints and adequate overlaps problems.

More about lead as a building material. Flat roofs are an ancient form mostly used in arid climates and allow the roof space to be used as a living space or a living roof flat roofs or low slope roofs are also commonly found on commercial. Note no nails in the edge. Investigative work carried out on warm roofs covered in lead has shown that in rare instances moisture can also be introduced by the development of sub atmospheric pressure in the roof space.

A flat roof is a roof which is almost level in contrast to the many types of sloped roofs the slope of a roof is properly known as its pitch and flat roofs have up to approximately 10. A cool roof is made by applying a reflective coating and can reduce the summer cooling costs of your.