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80 INSULATION


Better insulation can help prevent climate catastrophe


magazine takes a look. According to a recent study by the Intergovernmental Panel on Climate Change [IPCC], without urgent worldwide action to prevent global temperatures rising to a point 1.5 degrees higher than those of pre-industrial times, we face what they describe as a “Global Climate Catastrophe”. Whether you are a global warming sceptic


A


or not, the three-year study paints a bleak picture of our future, if urgent action to reduce carbon emissions – one of the principal causes of worldwide temperatures rises – is not taken soon. The IPCC report, presented in South Korea


in October 2018, says that rapid and significant changes need to be made across the board in energy consumption, land use, industry, cities and lifestyle. It says we need to travel less, use energy more efficiently and demand low carbon in everyday consumer products. The report also emphasises the need to improve levels of insulation in homes, offices and factories so as not to waste the energy that has already used precious resources to generate.


Open cell foams such as Icynene FoamLite are vapour open and allowing the building to breathe naturally.


Clearly, the main action points are aimed


at governmental levels but even small steps taken by individuals can collectively, make a significant impact on the issues that threaten us. Take home insulation. Over 60 per cent of our current housing stock was built pre-1960


The modern approach is a fully breathable, open-cell spray foam insulation, which is applied using a pressurised gun system.


when little thought was given to heat loss prevention. The incorporation of insulation in new-build properties only really began in the years following the oil-price shock of 1973. Now, with energy prices rising year by year


at inflation busting rates, efficient thermal insulation is more important than ever before. Unfortunately, there is a common


misconception that, to reduce heat loss in a building you simply put more and more insulation in the roof. This works up to a point, beyond which, adding more layers of insulation follows the law of diminishing returns. Why is this?


How Insulation Works To understand how insulation works it helps to understand heat flow, which involves three basic mechanisms – conduction, convection, and radiation. Insulation materials work by slowing


conductive heat flow and to a lesser extent, convective heat flow. Heat flows from warmer to cooler areas until there is no longer a temperature difference. Heat loss is also proportional to the speed of the moving air, the amount of moisture present and the temperature differential between heat source and the air itself. In a typical home, this means that in winter,


new study highlights the contribution better insulation can make to slowing the effects of global warming. ADF


WWW.ARCHITECTSDATAFILE.CO.UK


ADF MARCH 2019


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