Fibreglass Roof
Fibreglass roofs provide a high degree of thermal insulation and have stood the test of time. These have been in use on digesters for in excess of 20 years.
The Fre-energy roof has insulation that can rival that of the digester tank; we have yet to find a material that approaches this lifetime or provides the same level of thermal insultaion.
The gas in the digester roof space is wet. If moisture condenses onto a cold roof then heat will be lost.
Heat lost is heat that is not available for other uses.
The Fre-energy fibreglass roof is resistant to corrosion. Maintaining the volume of material inside the digester prevents corrosion.
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