Foam Systems

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What is Spray Foam Insulation?

Spray foam insulation, as the name implies, is a liquid foam that is sprayed and hardens into the insulation layer. It can be used to insulate roofs, attics, walls, floors and more. It has been used for over 30 years and is becoming increasingly popular because it is an effective insulator and can also prevent air leaks. However, it is more expensive than conventional insulation materials, such as mineral or glass wool, polystyrene boards or EPS (Expanded Polystyrene). There are two types of spray foam insulation to choose from: closed-cell spray foam and open-cell spray foam. If the spray foam insulation is suitable for your home and your budget, the type you choose depends on what you want to do.

Types of Spray Foam Insulation

There are two types of spray foam insulation: open and closed. Both are usually made of polyurethane and are filled with gas or air bubbles, but have different binding properties. We explain why you can choose one or the other.

Closed-Cell Spray Foam

Closed-cell spray foam creates a rigid solid that can support property structure when it is not in top condition. It is usually a better insulator than open-cell spray foam. This is because, after setting, it contains many separate gas pockets that slow down the heat flow. However, this is a moisture barrier, so you should ensure good ventilation of the room or attic to prevent condensation.

Open-Cell Spray Foam

Once bound, the open-cell spray foam is less dense – it can be squeezed by hand. Therefore, it cannot be used as structural support. It is not as good an insulator as closed-cell foam, so you need to apply a thicker layer to achieve the same level of insulation.

Other Foam Systems Include:

Upper Foam Injection Systems

Upper foam injection systems are used to protect atmospheric or low-pressure storage tanks. They consist of one or more foam chambers, which are attached to the tank cover immediately below the roof joint. The foam solution tube is extended from the dispensing source, which is in a safe place, to the foam suction mechanism immediately in front of the chamber or spout.

Dual-purpose tanks with concentrate and tank selection valve are part of two-class systems. The foam concentrate is injected directly into the water stream on the outlet side of the water pump. The manufacturer has a system that allows foam concentrate to be delivered to some points of sale at speeds up to 12 GPM (gallons per minute). With 3% foam, the maximum foam flow rate of this system would be 400 GPM.

Compressed Air Foam System

The compressed air foam system (CAFS) is a standard water pump system with an entry point at which compressed air can be added to the foam solution to produce foam. The air compressor also provides the energy that drives a gallon of compressed air foam per gallon rather than suction or standard water jets. The CAFS solution adheres to ceilings and walls, facilitating a quick reduction of heat generation.