Erm @Kezo Brydo lives under ground so perfectly safe upon the roof
Brydo will certainly be underground if not 6ft under given his wifes objections ???
The real problem I have, apart from the wife’s objections, mainly on safety concerns, is my lack of knowledge on masonary/tile paints.
If you must do the roof yourself I’d be getting a airless sprayer probably Wagner. Even so the slightest of slight breeze’s will will cause overspray and, you may unkowingly spray your neighbours house and car, which could prove a costly mistake. I sprayed my fence with a wagner airless in the summer. There was little to no breeze yet the overspray went every where including next door ?
The other thing to bare in mind is Pro’s have access to paints not available to the DIY man. However I found this:
What chemicals are in roof coatings? Roof tile paints and treatments typically contain the following: Titanium dioxide (for reflectivity and durability). Zinc oxide (to prevent algae and mildew growth). Acrylic polymer resins (for a flexible, water-resistant finish). Fire retardants (to suppress smoke generation).
Do painted roof tiles require much maintenance?
Just like painting exterior brickwork, your roof tiles will need to be repainted regularly once done. The good news is that most coatings should last between six to eight years before needing a touch-up. How long does roof paint last? Depending on the quality and thickness of the paint, you can expect roof paint to last about 10-15 years.
https://www.checkatrade.com/blog/cost-guides/roof-painting-cost/