Metal Deck Roof Assembly

There is no potential for condensation on the underside of the roof.

Metal deck roof assembly.

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. This roof assembly has no insulating sheathing installed above the roof deck. Winter design temperature 34 f. The roof deck most underlayment most roof coverings membranes and air films cannot be considered insulation.

Wide type tp standing seam system or 17 3 4 in. The key is that the deck or framing is noncombustible. Get free shipping on qualified metal roofing or buy online pick up in store today in the building materials department. Steel deck is a cold formed corrugated steel sheet supported by steel joists or beams.

If metal panels are installed over combustible decks the assembly needs to be tested using astm e108 or ul 790. An exception for combustible decks is that 16 oz sq. Summer design temperature 107 f dry bulb and 71 f wet bulb. For roof assemblies with combustible decks wood plank t g astm e 108 and ul 790 require two additional fire tests.

It is used to support concrete or insulating membrane of a roof. Wide type hstp standing seam system 24 msg min. Below roof deck spread of flame fm 4450 and ul 1256 are used to judge the contribution of the. Copper or thicker can be installed over combustible decks and be considered class a without testing.

Potential for condensation in phoenix arizona with unvented roof 1 750 heating degree days. Berridge metal roof deck panels. 1 an intermittent flame test in which the flame is turned on and off during the roof assembly to resist fire from flaming embers. 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.