Yes, all surfaces on which a Zenova IR thermal insulation render will be applied must be thoroughly cleaned and prepared prior to the thermal insulation render being applied.
Instructions for the use and application of Zenova IR thermal insulation render can be found on Zenova’s website in our technical datasheets and are also supplied with the product. Application instructions are like other renders, and include information on how to correctly prepare surfaces, when the use of Zenova Primer is required, and the correct process and thickness for the application of the Zenova IR thermal insulation render.
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