I have recently been contacted by a large company ( many branches throughout the UK) who specialise in coloured roof coatings to tiled roofs that are "guaranteed" for 10yrs.
The process briefly is as follows:
2) Renovation-replacing damaged tiles,repointing etc.
3) Fungicide application
4) Application of 2 microporous coats
Is it worth doing, or is it a best a purely cosmetic process that will need reapplying after ten years say, if not before?
Any thoughts? Particularly from people who have had this work carried out themselves, would be most welcome. Many thanks