Built Up Flat Roof Details

Wally for the project kick off segment of the roofing it right miniseries on installing a commercial roof from start to finish.

Built up flat roof details.

That would be. Whether you re an experienced commercial roofer a steep slope roofer thinking of adding low slope services or just like to learn from the best you ll want to join gaf senior commercial training specialists dave scott and wally brown dave amp. Built up roofing also called bur is the most common roofing material used on low slope roofs. Design a new roof or add durability when re roofing with a built up roof membrane bur.

Commercial roofing specs and details find the resources you need to design the best roofing system for your project. Once you ve added the framing it s time to add a layer of 5 8 inch plywood sheathing. Asphalt impregnated fiberglass reinforced roofing felts can be installed in multiple layers with a flood coat and aggregate or used in combination with modified bitumen in hybrid systems. The recognised flat roof build ups for best design practices are.

From there the flat roof system you choose will determine the materials you apply. The 8 step process for diy installation. Modified bitumen or torch down roofing is a popular alternative to classic tar and gravel built up roofs. Easier and faster to install it consists of a single rubber membrane that is heated with a torch and then bonded to a fiberglass mat that is attached to the roof sheathing.

Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board. Whether you re in the design phase or on the roof we can provide the tools and support to get the project done right. In the case of a flat roof insulation is usually either a rigid board above the deck or a mineral glass wool quilt immediately above the underdrawn ceiling depending on the type of roof design and construction. Bur is preferred for low slope or flat roofs because it creates a continuous sealed surface.

In terms of the thermal design of a flat roof what are the options and the best practices of flat roof build ups. One important and perhaps not so obvious fact is that a flat roof is not actually flat.