Thermguard is manufactured from 70% recycled newsprint with 30% harmless (according to the manufacturer) household chemicals added to make the product fire-retardent, as well as insect and rodent resistant. Thermguard is used extensively in the USA and Europe as it consists of recycled material used to conserve energy. Certain municipalities in the UK will subsidise Cellulose Fibre Insulation for use in their areas because of the "green effect". hermguard is fire retardant and rodent resistant and and has been awarded the SABS Mark. Made from the similar materials to Eco-Insultation, the same consideration needs to be given to ensuring your roof is water-proof.