Metal Deck Roof Assembly

Copper or thicker can be installed over combustible decks and be considered class a without testing.

Metal deck roof assembly.

For roof assemblies with combustible decks wood plank t g astm e 108 and ul 790 require two additional fire tests. This arrangement of roofing materials roof deck waterproofing membrane moisture resistant insulation is commonly referred to today as the protected membrane roof pmr or insulated roof membrane assembly irma. Fm approvals is the only organization in the world that tests complete roof assemblies when subjected to multiple perils such as fire testing above and below the deck wind uplift testing hail damage testing accelerated weathering water leakage foot traffic and corrosion resistance testing of metal parts. 1 an intermittent flame test in which the flame is turned on and off during the roof assembly to resist fire from flaming embers.

Classic rib steel roof panel in charcoal. Mechanically attached metal roof panels 12 3 4 in. What is the best rated metal roofing product. Winter design temperature 34 f.

Summer design temperature 107 f dry bulb and 71 f wet bulb. All metal roofing can be shipped to you at home. With such roofs the membrane s temperature range and rate of temperature change are drastically reduced. The key is that the deck or framing is noncombustible.

An exception for combustible decks is that 16 oz sq. 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. Below roof deck spread of flame fm 4450 and ul 1256 are used to judge the contribution of the. The best rated metal roofing product is the 16 ft.

If metal panels are installed over combustible decks the assembly needs to be tested using astm e108 or ul 790. Yes metal roofing can be returned and have a 180 day return period. Berridge metal roof deck panels. Wide type hstp standing seam system 24 msg min.

Potential for condensation in phoenix arizona with unvented roof 1 750 heating degree days. A roof assembly is tested to meet. This roof assembly has no insulating sheathing installed above the roof deck. 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.

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