3/7/2023 0 Comments Flat roofsThis will give additional stability to the roof structure. The basic construction of a flat roof starts with roofing timber that is laid across two upright items, usually two walls.įor additional stability, you can also use steel joists that are built into one or both of the walls. Having a manual for warm flat roof construction with details and a summary of rules to follow helps. That will help you remember certain factors and details to build the best possible flat roof. 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. Insulation (for the warm flat roof only) The basic construction process.Rubber EPDM membrane (or other exterior covering).In addition to basic tools such as a drill, utility knife and measuring tape, you’ll need the following basic materials, knowledge of local regulations, and a set of detailed instructions: This is probably one of the easiest versions for a DIY project.Ī list of materials for flat roof installationĭepending on the type of roof you’ve chosen – either warm flat roof or cold flat roof – you’ll need to gather a number of important materials to build a flat roof. It’s durable, and can be fastened to the roof with fasteners and glue. To guarantee the material stays secure, most of these materials come as peel-and-stick systems that are easy to apply.Īlso known as EPDM (ethylene propylene diene monomer), this is natural rubber – the kind you might find on a car tire or an inner tube. It can be made stronger with a mineral-based surface. This involves a single-ply rolled roof that creates a protective layer against ice and water. There are several methods and materials for the design of the exterior surface of a warm or cold flat roof.Īlso known as the built-up roof (BUR), this type of flat roof features three or more layers of waterproof material, mixed in an alternating fashion with hot tar and a layer of smooth stone-like gravel.Īs you might imagine, this is the cheapest version possible and good for covering a shed. The 3 most common materials used for flat roof construction This creates the potential for condensation due to the gaps in temperature if too much condensation builds up, it can cause the wood to rot away, especially with an outdoor shed.įor that reason, cold flat roof construction needs to keep in mind the need for unblocked airflow. Problems can arise if air is allowed to move, but not freely. It’s important to keep in mind that installing a flat roof is a largely an either/or proposition: EITHER no air is allowed to circulate OR there is constant airflow throughout. In creating the cold flat roof, air is allowed to circulate freely between the joists and there is no insulation. In the warm flat roof construction, there is insulation packed into every possible space where air can flow. The major difference between the warm flat roof and the cold flat roof has to do with the air flow between the roofing timbers (known as “joists”) that help to hold up the roof. There are design differences for each type.
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