|Bales of cellulose insulation.|
|The Zellofant feeding.|
During the course of the day, 141 bales of compressed cellulose insulation, each weighing 14kg were fed to the Zellofant, which promptly spat them though a hose to the professional up in the roof. By cutting into the paper envelope, he was able to blow in the cellulose insulation, resulting in 200mm thick layer of insulation between the rafters. That, combined with the wood fibre sheets that lie on top of the rafters means our roof is pretty well insulated*.
|There's 1974kg of cellulose behind that paper membrane!|
*If you're a interested, the wood fibre boards have a K (thermal conductivity) value of 0.044 W/(m·K) and are 35mm thick, while the cellulose has a K value of 0.04 and is 200mm thick, meaning we should have a total U value of 0.17 for the roof surfaces (if I've understood the formulae correctly!).