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There are different types of insulation that you can use in your roofing. Each type of insulation has a different insulation value or U-Value - the lower the U-Value, the better the insulating material. Typical insulation in an attic should be more than 20-30cm thick unless you are using more advanced thinner materials. Here are a few of the most common types of insulation
* Fibreglass – Fibreglass is made from molten glass spun into microfibers.
It is probably the most commonly used form of roof insulation .
* Rock Wool – Rock wool is made with molten rock instead of glass.
* Cellulose - made from shredded recycled paper.
* Eco insulation - this can be made of a range of recycled materials, such as plastic bottles or paper.
* Reflective foil thin insulation – this type of insulation is thinner than regular insulation, it has many layers of foil with fibrous material in between.
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It is important to remember that each of these insulation materials will have a different primary energy, that is, the energy that is used in production. Rock wool production for example is energy intensive. Other factors such as the distance the material travels from the supplier should also be taken into account to ensure the minimum amount of energy is expent. Each house is different and the final decision is up to the consumer.
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