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Blown In - Cellulose Insulation

Cellulose Insulation has gained its reputation worldwide as the most environmentally friendly insulation and is fast becoming a popular choice for insulating homes.

For every 1% not covered = 5% loss in insulation effectiveness. With its' loose fill properties - cellulose insulation can provide 100% coverage by insuring no gaps in the installation.

Blown In Cellulose Insulation Is:
   > Fire & Pest Resistant
   > Manufactured from recycled paper
   > Great acoustic properties

How is Cellulose Insulation Made?

Cellulose Insulation is made from 70-80% recycled paper which is pulverised into smaller fibres and then treated with fire and pest retardants - borax and boric acid. Both these chemicals are quite common in many household products and are reported to provide no ill effects at levels found in insulation.

Cost of Cellulose Insulation:
Cellulose insulation is one of the the cheapest insulation to manufacture and easiest to install particularly in hard to get to ceilings. There are a number of factors that can affect the cost of installing blown in cellulose insulation but as a guide here is what you could expect to pay to have cellulose insulation installed in 100sqm home.

 Product Average Installation
 Complex or Remote Area Installation
 Fibreglass $1,300 $1,500

Sourced in Australia Only - Cellulose is relatively simple to produce and consequently is often manufactured by the installers as required in their factory.

Environmental Issues: Cellulose insulation is regularly claimed as the most environmentally friendly insulation product on the market because it is

  • Made from 70-80% recycled paper which would otherwise end up in landfill &
  • Uses very little energy to produce so has the lowest CO2 effect on the world's climate.

Fire Resistance: You would expect that given cellulose's principal ingredient being paper it would burn quite easily. But whilst it does not have the same level of fire resistant properties as some other insulation the fire retardant chemicals added to the manufacturing process work very well at reducing the risk the insulation material catching on fire. It is quite difficult to light even with a blow torch. 

Nevertheless fires can still occur particularly due to poor installation where down lights & ceiling fans are not adequately covered.
As a result of a number of fires attributed to improperly installed insulation (note from all types of insulation) the Government now requires all down lights to be covered by approved covers to reduce the risk of ceiling fires. 


Other Advantages of Cellulose Insulation

  • Access to difficult or small open spaces.
  • Less thickness for same R-value
  • Creates a seamless cover - no air holes to reduce thermal effectivenes


Disadvantages of Loose Fill Insulation

  • Drafts can move insulation around ceiling (many installers use a glue cover to reduce the risk of this) 
  • Heavier than other forms of insulation which may result in additional stress on ceilings
  • Can make it difficult for electricians or other trades people to access wires
  • Inconsistent R - Value depending on thickness and application across ceiling if inexperienced at installing 
  • Can settle and may require top up later (many installers compensate for this during the installation) 
  • More difficult to remove

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 Tags: Cellulose Insulation, Blow in, Installers, Benefits of, Blown In, 


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