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Use Of Gypsum Roof Deck

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Introduced as a roof deck substrate in the 1940”s. As a levelling layer for the air/vapour barriers in a conventional roof system.

Bulb Tees are high strength, lightweight, steel sections

In decades past, poured gypsum enjoyed a signiicant niche of the roof deck market­ place.

Use of gypsum roof deck. Understand the installation procedures and attributes of roof deck systems and how they improve in place insulation, fire protection, and acoustical performance. DensDeck ® Roof Boards can replace any generic type X gypsum board in any roof assembly in the UL Fire Resistance Directory under the prefix. A lite-deck fastener is designed to secure insulation to gypsum and all.

This system provides fire resistance, seismic and wind load diaphragm values in addition to an economical roofing membrane substrate. While many heavy-duty fasteners have achieved relatively high initial pullout resistance values in gypsum decks, those values greatly diminish over time as insulation or roof cover movement works the screw back and forth in the setting. Support end joints with cross-tees not supported by framing.

Gypsum Decks As with CWF decks, gypsum decks will not hold a traditional fastener. DensDeck Roof Boards are utilized in a wide variety of roofing systems for new and re-roofing applications as gypsum roof cover boards and thermal barriers. Use minimum 13 mm (1/2-inch) fillet welds on alternate sides of sub-purlins, both sides at end joints to main purlins.

To be weatherproofed to avoid damage. Its main function is to provide structural support for the roof system and, therefore, is a building element that needs to be designed by a licensed design professional because proper support of the roofing above is critical to the roof system’s success. Place plank on lower flanges of sub-purlins or other framing with ends and edges supported.

This is usually because low quality, leak prone decking materials, such as EPDM rubber are used, often in an effort to save money. With the variety of decks to be encountered (both new and old), it is incumbent upon rooing experts to be the authority on these matters. Gypsum Deck Plank for Roof Decks:

And it all starts with the roof deck.. The gypsum roof deck system is supported by bulb tees generally spaced from 24” to 32” on center. FlameBlock with Pyrotite facing out 2.

To provide a smooth surface for a protected membrane roof system. Understand the proper repair of poured gypsum roof decks installed in the 40’s, 50’s, and 60’s to allow continued use of these systems without removal and disposal costs. If you want to avoid problems and build a durable, watertight deck, PVC is the best material to use.

The maximum drift load is 85 psf and the roof is spongy in areas, making us suspect water has gotten into the system. Answers to frequently asked questions about engineered roof deck systems are provided in this section. Gypsum Deck Plank for Roof Decks:

What you see from the bottom appears to be like a drywall material. A) extension of the firewall 30” beyond the roof vertically (parapet construction) b) Use of Class A flame spread rated sheathing for 4’ on each side of the wall where it intersects the roof deck c) Type X gypsum wallboard installed underneath roof deck 4’ on each side of fire wall. Repairing Your Roof Repairing Your Roof .

Easy application to patch many different types of roof decks such as gypsum roof decks. Anyway, we have decided to remove the gypsum deck in the area of the drift load and re-roof with metal deck, insulation and an adhered EPDM. The questions and answers are divided into specific roof deck systems for ease of locating your questions.

Provide continuous 16 mm (5/8-inch) minimum bearing for plank support at deck Formboards placed between the bulb tees contain the fast. The Westford, MA-based National Roof Deck Contractors Association has published guidelines for rehabilitation of old gypsum decking.

Cut plank to fit at ends and framed openings. The roof, although this ideal sequencing is rare. Unfortunately, many homeowners who have a flat deck roof have to deal with frequent leaks.

Learn about roof insulation, insulation, roofing, roof deck, mechanical fastening, gypsum wood, ballasted roofs and related trends for building operations success. When sidewalls and the roof deck are not erected concurrently, panel edges and ends need . Discover the best options for a stable roof surface.

DensDeck Roof Boards are utilized in a wide variety of roofing systems for new and re-roofing applications as gypsum roof cover boards and thermal barriers. "Chicken wire" is draped over the bulb of the bulb tee, then the gypsum concrete is poured over the top. Strategies for Attaching Insulation to Roof Decks.

Home of Building Operating Management & Facility Maintenance Decisions.. Drill-Tec™ LD Fastener secures insulation to gypsum and all cementitious wood fiber decks. Repairing Your Roof .

Get all the details and benefits here! What you have described is a "poured-in-place" gypsum deck. Roof system, the type of decking is one of the most important.

The type, grade, thickness and installation of materials used for roof decks should conform to the requirements of the relevant local building codes of practice and regulations. Structural Panel Concrete Roof Deck is versatile and economic option for both low and steep slope roofs. It has a gypsum form board on the bottom, sitting on the flange of a bulb tee.

Incorporating EONIC™ Technology has doubled DensDeck Prime’s resistance to moisture making it the only roof board with manufacturing specifications that include 5% total water absorption resistance by weight and 1 gram surface water absorption performance on both sides. For fire rated roof decks weld per fire test assembly. How to fix leaks and do minor repairs.

Gypsum concrete roof deck systems consist of a form board, wire reinforcement, and a poured application of gypsum concrete. If the deck is sound, it may be possible to treat the deck much like concrete, by priming the surface, adhering thermal insulation and installing a new roof membrane.. One concern is deck integrity, and prolonged roof leakage could corrode the wire reinforcing and leach binder to the point that an unaware person could fall through the deck.

Stagger joints in adjacent courses. Looking for roof deck materials to ensure a stable roof surface? Over three decades ago, the author was involved

This article will explore features of poured gypsum. When used, the insulation must consist of one of the types specifi ed.

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