Pros And Cons of Reflective Insulation | Benefits of Reflective Insulation

Pros And Cons Of Reflective Insulation

Who We Are • An Overview of the Industry The industry of insulation materials have seen an evolution over a period of time.

• From being used in the packaging of various products with its application being put to use in industries as well as households, insulation materials have now come to be used in the construction purposes and that is where they have found their real value.

• Being able to reflect the heat and the cold that the nature has to offer, these sheets have managed to maintain a comfortable environment for people staying in very warm and equally cold areas.

Types of Insulation • One of the types of insulation used in building construction and also retro fitted is reflective insulation.

• Other types of insulation such as fiberglass wool, rock mineral wool and polystyrene are also available.

• Some polystyrene insulation is backed with reflective foil to combine the advantages of both.

• Each has its own advantages and disadvantages and this article focuses on reflective insulation.

• Reflective insulation (also known as foil insulation) is usually made from aluminum foil or aluminized polyester.

• Reflective insulation is commonly used in two main areas; the first is in unventilated cavity walls.

• The second is as insulation in pitched or angled roofs.

• Reflective insulation reflects radiant heat and works best with a still air layer of at least 25mm/1 inch.

• It is most effective when kept clean and dust free. The layer of still air itself gives it a degree of extra insulation

How Houses Lose Heat • To understand about how insulation works, some knowledge of how heat is transferred is required.

• Heat is transferred in three ways: radiation, convection, and conduction.

• Radiation is where the heat is transmitted directly from a hot surface in a straight line to a cooler surface; sunlight is a good example of radiant heat.

• Convection is where the heat is transferred via liquid or gas movement for example hot central heating radiators.

• It is also the reason things like water are hotter at the top then at the bottom.

• Conduction is where heat is transmitted along a material or two materials touching each other a good example of this is metal pans.

• Different materials transmit heat better then others (metal is a better conductor then wood for example).

Advantages of Reflective Insulation • It is very effective in warm climates where it is useful in keeping buildings cool.

• Unlike other insulation, it does not degrade over time due to compacting, disintegration, or from absorbing moisture.

• It is thin and fairly lightweight and much less bulky then other forms, making it easy to work with and fit.

• It can also be used as a vapour barrier as it is relatively water proof and unaffected by moisture.

• It is also none toxic and none carcinogenic unlike other forms of insulation making it safer and easy to install with the use of less safety equipment.

Disadvantages of Reflective Insulation • It is generally more expensive due to being a metal-based product.

• Whilst effective in warmer climates, it will be required to be combined with other forms of insulation in colder climates.

• This is in order to prevent heat loss in cold weather from convection.

• There is the potential of reflective insulation becoming an electrical hazard should a wiring fault occur, it is after all a metal and conducts electricity.

• It also relies on being clean and free of dust and debris, both when fitted and when in use.

• This means in some areas such as roofs it may require cleaning of dust from time to time to ensure maximum efficiency.

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