Metal Deck Roof Assembly

Winter design temperature 34 f.

Metal deck roof assembly. Steel deck is a cold formed corrugated steel sheet supported by steel joists or beams. This roof assembly has no insulating sheathing installed above the roof deck. Potential for condensation in phoenix arizona with unvented roof 1 750 heating degree days. It is used to support concrete or insulating membrane of a roof.

The key is that the deck or framing is noncombustible. Summer design temperature 107 f dry bulb and 71 f wet bulb. Get free shipping on qualified metal roofing or buy online pick up in store today in the building materials department. Wide type hstp standing seam system 24 msg min.

The roof deck most underlayment most roof coverings membranes and air films cannot be considered insulation. Below roof deck spread of flame fm 4450 and ul 1256 are used to judge the contribution of the. Building and energy codes almost always specify a required minimum r value for exterior walls and roof assemblies with above deck insulation so the minimum required r value in your local jurisdiction is something that you need to. 1 an intermittent flame test in which the flame is turned on and off during the roof assembly to resist fire from flaming embers.

An exception for combustible decks is that 16 oz sq. Copper or thicker can be installed over combustible decks and be considered class a without testing. Wide type tp standing seam system or 17 3 4 in. Mechanically attached metal roof panels 12 3 4 in.

If metal panels are installed over combustible decks the assembly needs to be tested using astm e108 or ul 790. Berridge metal roof deck panels. Gauge coated steel to be secured to the panel clips by engaging manufacturer s snap on seam with vinyl insert the panel clips are to be attached to the corrugated metal substratum with one no. Metal panel roof systems require a minimum 3 8 air gap between the underside of the metal panel and the covered or uncovered insulation board.