Perlite Concrete Roof Deck Insulation

Delete 3 03 e 2 when perlite insulating concrete roof deck is designed as a diaphragm to resist horizontal forces and is installed over metal deck.

Perlite concrete roof deck insulation.

Energyguard perlite roof insulation is designed to be used directly over structural roof decks. The fire safety of perlite concrete is unsurpassed by most roof insulating materials of equivalent thickness. Expanded perlite s high insulating qualities light weight and versatility make it an essential part of the construction industry for loose fill insulation and lightweight insulating concrete. Insulating values of a perlite concrete roofdeck depends on the density of the concrete mix that is prepared.

It has superior wind and fire resistance over other roof insulation materials and with the addition of polystyrene insulation board sandwiched in the perlite concrete high thermal resistance values are economically achieved. Positive drainage is easily accomplished by varying the thickness of perlite concrete or by stair stepping different thicknesses of polystyrene. When used as insulation over a corrugated steel deck perlite concrete gives the system more than a 1 hour fire rating. In recover applications all wet areas of the old roof must be removed.

It is the ideal construction aggregate filler for masonry fill insulation roof decks floor systems and other significant areas that need insulation. Perlite concrete roof deck insulation is an ideal base for built up and single ply roofing systems. Its weight can be varied in the range of 20 to 50 pounds per cubic foot depending on the mix design selected. Finally permanence of perlite insulating concrete is another important factor.

A good rigid insulation is insulating concrete which can be mixed and placed on the job. Perlite concrete is incombustible. All loose and protruding gravel must also be removed. This can be perlite concrete vermiculite concrete concrete made with polystyrene aggregate or cellular concrete.

It is also widely used as a separation board over existing roofs in recover installations. Perlite is a versatile and sustainable mineral that is mined and processed with a negligible impact on the environment. Perlite concrete is not subject to rot mildew or damage by water. Typical u values range from 0 21 btu h ft 2 f 1 19 w m 2 k for a 2 inch 50 8 mm 27 lb ft 3.

Provide minimum 1 inch 25 mm wide control joint through thickness of insulating concrete at building expansion joints in structural roof deck root projections.