Lightweight Concrete Roof Decking

The lighter the concrete the better lower the k factor.

Lightweight concrete roof decking.

The use of lightweight concrete as a roof decking and insulation system has expanded in the past five years. Compressive strengths from 125 350 psi are common for lwic used in roof deck. Increased usage can be attributed to the recent industry wide insulation shortages and delamination deficiencies. The reduced quantity of concrete and steel reinforcement offsets the marginally higher cost of lightweight concrete floor systems.

With standard structural concrete the aggregate used is sand and stone. Lightweight roof deck concrete is a one component lightweight insulating concrete ideal for roof fills and for providing slope. Lightweight concrete floor provides more efficient strength to weight ratio in concrete floor systems when compared to other conventional concrete floor systems. These floors are constructed for different purposes but the reduction of dead loads on the structure is.

Structural panels concrete roof deck is an innovative technology designed to provide a structural roof sheathing without the need for thermal barriers pouring. Aerix insulating concrete provides a superior lightweight concrete roof surface compared to rigid board insulation systems. Dektek s luxury tile decking is custom poured high strength concrete deck tiles that support more than 1 000 lbs per tile. Aerix insulating concrete for a superior roof.

Lightweight insulating concrete low density non structural concrete comprised using ultra lightweight expanded mineral aggregates or preformed foam. Hard rocks with a low water absorption rate and weighs approximately 2403 kg m 3 150 lb cf. It is adaptable to any roof configuration and depending upon the condition of the existing roof may be installed directly to build up roofs gravel roofs and galvanized steel deck roofs thus eliminating costly tear. 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.

The normal weight concrete employs standard aggregates i e. However when a lightweight structural concrete lwsc roof deck is poured in place it uses significantly more water. Lightweight insulating concrete lwic is defined as having oven dry unit weights of 50 lbs ft or less. Vermiculite for roof decks can be placed over various kinds of form boards fiber fiberglass acoustical and asbestos cement.

The most common use of vermiculite lightweight concrete is for light structural roof decks and for insulation fill over metal decking and structural concrete. The addition of insulation board increases r values and reduces dead load. Installed over precast cast in place concrete or galvanized steel decking. The end result of the structural lightweight mix is a deck that can be 20 25 lighter than standard structural concrete.

The concrete deck tiles are 1 thick and weigh approximately 10 5 lbs per.