In an inverted roof construction the Sarnafil membrane is installed directly to the structural decking (usually concrete) and the SarnaTherm thermal insulation is installed on top of the membrane. Then SarnaTherm Aquazone® a high performance non-woven polyethylene membrane is installed over the insulation to minimise the cooling effect associated with rainwater flowing down through the insulation and draining away. It can significantly reduce the insulation thickness. A vapour control layer is not required.


This type of roof is generally used where there is going to be paving require as in a roof terrace for example.  


Sarnafil carry out thermal and condensation risk analysis for every project inclusive of SarnaTherm insulation. Furthermore a bespoke designed system eliminates any performance and design issues

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