About Alububble Radiant Heat Barriers

Homes in southern Africa which fall into the 'Hot Belt' regions,best replica watches often have a need to run air conditioners in order to keep the interior of their buildings cool during the sweltering hot summer days, and heaters in the cold winters.  With the projected Eskom tariff increases over the next few years this is going to become a very expensive means of creating a cooler more comfortable ambient temperature within your building.  There is a much easier way, a simple home improvement which will significantly cut down on your cooling and heating costs

This green home improvement is a radiant Heat Barrier


Understanding Heat Flow

RADIATION - Is the transfer of heat from one object to another without the objects making contact. e.g. Heat from a space heater is Radiant Heat.  Radiant heat is transferred by electromagnetic waves.  The radiant heat is released when the waves are absorbed by an object for example the roof, which then transfers the heat to your roof space.  93% of summer heat gain is from radiant heat.

CONVECTION -  Is the transfer of heat by air or liquid, this type of heat transfer travels up or down.   As the air in your building circulates the warm air rises and escapes through the ceiling into your roof space and out through the roof.

CONDUCTION  -  Is the transfer of heat through two objects that are in contact with each other.  Heat flows from the warmer object to the cooler object.  An example of this is touching a cast iron handle from a pot which is heated on the stove,  the pot will become hot and transfer heat to the handle.

 What is a Radiant Heat Barrier?

It is very important to understand what a Radiant Heat Barrier is, and how it works.  Alububble Radiant Heat Barriers consist of an aluminium foil sheet, which is laminated to a layer of plastic bubbles on one side and either a foil facing or white plastic facing on the other side.

This sheet of foil laminate is placed in the roof space just below your roof tile or roof sheeting.  The roof space is the hottest part of our home and the heat build up due to radiant Heat Gain into the roof is the primary cause of heat transfer into your home.

This thin layer of foil will knock back radiant heat transfer into your roof space and subsequently into your building, because it keeps the roof space cooler, you will require less energy to maintain a comfortable indoor temperature.

What is traditional Insulation and how does it work?

Without Alububble Radiant Heat Barriers you traditional bulk insulation acts like a sponge, absorbing all the heat possible. The more you have the more it can absorb, but the way for insulation to shed the heat it has absorbed is t pass it on down to the cooler space below it which is the interior of your building.  The insulation stays warm well into the night and the interior will only begin to cool when the insulation cools down in the early hours of the morning. 

Frequently asked questions

Q:-   How does a Radiant Heat Barrier really work:

A:-   The best way to explain Alububble Radiant Barrier System is to give a few examples:

Thermos Flask - Great at keeping hot drinks hot, and cold drinks cold.  The tight seals and air space, eliminate conductive and convective heat, and the outer reflective surfaces re radiate the radiant heat.

Emergency Blankets - Used in survival and first aid, they are light weight reflective blankets that protect from the most extreme conditions.

Hot and Cold bag - Every time you order a pizza for delivery, they are placed into a bag with reflective aluminium foil inner, this keeps the pizza warm until it reaches its destination.  The same applies when you would like to keep cool drinks cold, just add ice and your cold drinks stay cold until you need them.

Q:-  I already have bulk insulation, do I really need a Radiant Heat Barrier?

A:-  Yes, by adding a Radiant Heat Barrier you will save on your heating and cooling expenses.  You will be much more comfortable in both Simmer and Winter.  Adding an Alububble Radiant Heat Barrier System allows your current insulation to work more efficiently.

In the Summer - Alububble Radiant Heat Barriers will stop 97% of the summer heat gain due to radiation across your roof space.

In the Winter Alububble Radiant Heat Barriers in your building are effective in reducing winter heat loss.  Instead of losing all the heat it will be reflected back into  your home, keeping your home warmer by between 6 - 8 degrees.

Q:-  How do I know how much Insulation to use?

A:-  SANS 204 Energy Efficiency standard, gives the minimum requirement per region for Insulation Intervention.  It is given in 'R' - value or 'Resistance' value, and is given for roofs, walls and floors.  The given  R-value can be easily achieved by adding firstly a Radiant Barrier and then at least 100mm of Bulk insulation material.

Q:-  What is an 'R' - value

A:-  An 'R' value is the measurement of resistance to the flow on conductive heat transfer.  Since Alububble radiant Barriers are designed to work with Radiant Heat and not conductive heat they do not have an actual R value.  Therefore any theoretical R - value depends on the method of installation, and the size and number of air spaces surrounding the material.

Q:-  What about a foil faced bulk product, isn't that just as good as Alububble Radiant Heat Barriers?

A:-  No The foil on the bulk is in direct contact with the roof space floor, which is the ceiling, The foil becomes more conductive when it makes contact with a solid surface.  The air space facing the foil surface is of primary importance to the effectiveness of the Radiant Heat Barrier

Q:-  Will Alububble Radiant Heat Barriers lose their effectiveness over time?

A:-  Definitely not.  Traditional insulation needs to be replaced or added to after 6 - 8 years because over time it begins to settle.  Alububble Radiant Heat Barriers will last the life of the roof structure they are applied to and do not settle.  The 'R' value for the system which is given will be the 'R' value of the product at the end of its life cycle.

Q:-  Are Alububble Radiant Barriers 'Green Products'?

A:-  Yes.  Alububble Radiant Heat Barriers conserve energy use which lowers your carbon-footprint, and in so doing helps the environment.  They are non-carcinogenic, do not emit any gasses and are very environmentally friendly.  With less heat being emitted from the roof the high energy costs of running an air conditioning unit on a hot summer's day is greatly reduced, which means the bills will be lower an in fact it takes very little time for the radiant barrier to pay for itself.

Q:-  What kind of Savings can I expect from installing Alububble Radiant Barriers?

A:-  Your actual savings may vary due to many different factors, including:  Current insulation, accessible roof space, natural shading of your home, geographic location, orientation of your home.

An average savings of between 17 - 25% may be expected.



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