Lightweight Concrete Roof Wood Deck

The normal weight concrete employs standard aggregates i e.

Lightweight concrete roof wood deck.

It is designed for efficient construction of gradient and thermal insulating layers of flat roofs. Dektek tile is an elegant and innovative precast concrete decking material that is especially designed for elevated decks and roof decks. With structural lightweight concrete a mix of shale slate slag and clay are used and with this mix the aggregate is fully saturated prior to mixing. However when a lightweight structural concrete lwsc roof deck is poured in place it uses significantly more water.

Low density insulating concrete roof decks are monolithic composite systems cast over galvanized metal decks structural concrete wood decks or existing roof systems. Lightweight insulating concrete decks non structural low density lightweight insulating concrete lwic can be placed upon a variety of structural deck systems that have been designed to carry loads. Brian cornwell writer brian cornwell founded next luxury in 2007 as a magazine for modern gentlemen. If a roof is installed over the top surface and the deck was cast into non vented metal form deck the logical conclusion is that the dry down mechanism is at best severely retarded.

The end result of the structural lightweight mix is a deck that can be 20 25 lighter than standard structural concrete. The light weight is achieved through use of expanded aggregates such as perlite or vermiculite air entrainment or both. Thereafter precast systems are commonly topside insulated below the roof cover using adhered insulation panels or cast in place lightweight insulating concrete. Lightweight insulating concrete is also considered non combustible and nailable.

Underlayment systems gypsum soundmat floor leveling cell crete has been california s floor system expert for over 40 years. Hard rocks with a low water absorption rate and weighs approximately 2403 kg m 3 150 lb cf. Lwic decks provide high r values built in air barriers fire ratings sound ratings and improve the overall performance of the building envelope. Lwic can be placed atop any of the above mentioned concrete deck types or directly upon a properly supported corrugated steel.

Because of the relatively high aggregate content excess free water is used in pouring the deck. Roof systems installed over structural lightweight concrete in the tight time driven sequence of construction will likely incur a very heavy upward water vapor drive. With standard structural concrete the aggregate used is sand and stone. Concrete roof deck systems lightweight insulating concrete lwic roof decks are high performance roof insulation systems that reduce roof maintenance and replacement costs.