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.

The 8 step process for diy installation. 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. 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.

From there the flat roof system you choose will determine the materials you apply. 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. One important and perhaps not so obvious fact is that a flat roof is not actually flat. 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.

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. Commercial roofing specs and details find the resources you need to design the best roofing system for your project. 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. In terms of the thermal design of a flat roof what are the options and the best practices of flat roof build ups.

The recognised flat roof build ups for best design practices are. Once you ve added the framing it s time to add a layer of 5 8 inch plywood sheathing. Design a new roof or add durability when re roofing with a built up roof membrane bur. That would be.

Firestone offers durable ply iv 4 and ply vi 6 roofing felts. Repairing blisters on a flat roof.