Perlite Concrete Roof Deck Insulation

Positive drainage is easily accomplished by varying the thickness of perlite concrete or by stair stepping different thicknesses of polystyrene.

Perlite concrete roof deck insulation. Provide minimum 1 inch 25 mm wide control joint through thickness of insulating concrete at building expansion joints in structural roof deck root projections. And the green community recognizes perlite enhanced products like lightweight insulating concrete roof decks as a high performance solution drawn from a natural material of nearly unlimited supply throughout the world. A good rigid insulation is insulating concrete which can be mixed and placed on the job. Energyguard perlite roof insulation is designed to be used directly over structural roof decks.

Perlite concrete roof deck insulation is an ideal base for built up and single ply roofing systems. Perlite is a versatile and sustainable mineral that is mined and processed with a negligible impact on the environment. The fire safety of perlite concrete is unsurpassed by most roof insulating materials of equivalent thickness. In fact its strength increases with age.

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 insulating concrete consists of an appropriate mixture of portland cement perlite aggregate and water. It is the ideal construction aggregate filler for masonry fill insulation roof decks floor systems and other significant areas that need insulation. 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.

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. Finally permanence of perlite insulating concrete is another important factor. All loose and protruding gravel must also be removed. Perlite concrete is incombustible.

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. It is also widely used as a separation board over existing roofs in recover installations. In recover applications all wet areas of the old roof must be removed. Insulating values of a perlite concrete roofdeck depends on the density of the concrete mix that is prepared.

Its weight can be varied in the range of 20 to 50 pounds per cubic foot depending on the mix design selected.