Built Up Flat Roof Details

Modified bitumen or torch down roofing is a popular alternative to classic tar and gravel built up roofs.

Built up flat roof details. 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. Firestone offers durable ply iv 4 and ply vi 6 roofing felts. Built up roofing also called bur is the most common roofing material used on low slope roofs. Repairing blisters on a flat roof.

In terms of the thermal design of a flat roof what are the options and the best practices of flat roof build ups. 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. 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. Bur is preferred for low slope or flat roofs because it creates a continuous sealed surface.

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. 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. Once you ve added the framing it s time to add a layer of 5 8 inch plywood sheathing.

Wally for the project kick off segment of the roofing it right miniseries on installing a commercial roof from start to finish. That would be. It is composed of alternating layers of reinforcing fabric and bitumen asphalt and is finished with a top layer of aggregate such as stone or gravel. One important and perhaps not so obvious fact is that a flat roof is not actually flat.

Design a new roof or add durability when re roofing with a built up roof membrane bur. The 8 step process for diy installation.