Form Board Roof Decking

Common roof sheathing applications and installation recommendations are described in the related publications listed at right. The last one is none other but our main topic in this article. Oriented strand board isn t plywood nor is it a type of particleboard fiberboard or wafer board and although it is a newcomer to a plywood dominated market its use for exterior sheathing is.

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Plank sheathing usually 1 6 or 1 8 was used as a roof deck before plywood.

Form board roof decking.

The bulb tees which are very strong vertically but quite flexible horizontally provide the long span strength. New millennium created date. Correct installation of roof sheathing will ensure the best performance and help reduce complaints and callbacks. 1 2 12 7 mm and 5 8 15 9 mm densdeck roof board may also be used in vertical applications as a backer board or liner for the roof side of parapet walls.

Based on the above analysis the removal and replacement of roofing components is a scope of repair replacement issue and not a coverage issue. Densdeck roof board can also be used as a form board for poured gypsum concrete deck in roof applications as well as a substrate for spray foam roofing systems. Accordingly covered property within the meaning of the iso building and personal property coverage form is the building and not individual components such as its roof shingles or roof decking. Gypsum poured over formboards has been used as a substrate for roofing materials since the 1940 s.

In the first half of the 20th century roofs in missouri were built with wood shingles over planks spaced about 1 apart. The poured gypsum roof deck consists of steel bulb tees a form board usually composed of gypsum or fiberglass wire reinforcing mesh and the gypsum concrete. Roof decking comes in at least five different types. Steel form decking for commercial construction keywords.

There are two most common features of the wooden t g roof deck type that you can use to identify it. For information on large panelized roof systems refer to the commercial construction application section. Those include the plank step plywood oriented strand board osb and tongue and groove boards. Formboards used with gypsum roof decks include fiberglass formboards mineral fiber formboards and asbestos panel formboards.

Code of standard practice. Take proper saftey precautions when removing or working with asbestos panel formboards.

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