Perlite Concrete Roof Deck Insulation

In fact its strength increases with age.

Perlite concrete roof deck insulation.

All loose and protruding gravel must also be removed. 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. 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.

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. 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. It is also widely used as a separation board over existing roofs in recover installations.

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. Insulating values of a perlite concrete roofdeck depends on the density of the concrete mix that is prepared. Perlite concrete is not subject to rot mildew or damage by water. Positive drainage is easily accomplished by varying the thickness of perlite concrete or by stair stepping different thicknesses of polystyrene.

Perlite insulating concrete consists of an appropriate mixture of portland cement perlite aggregate and water. In recover applications all wet areas of the old roof must be removed. This can be perlite concrete vermiculite concrete concrete made with polystyrene aggregate or cellular concrete. A good rigid insulation is insulating concrete which can be mixed and placed on the job.

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. Energyguard perlite roof insulation is designed to be used directly over structural roof decks. When used as insulation over a corrugated steel deck perlite concrete gives the system more than a 1 hour fire rating. The fire safety of perlite concrete is unsurpassed by most roof insulating materials of equivalent thickness.

Perlite concrete is incombustible.