Originally Posted by
SLUDGE FACTORY
Roof tiles can be painted wether they are original or fake
I would suggest using a strong primer from the zinser brand
You need to scrape off the flaking , peeling stuff then apply a coat of the primer which is a water based product but is the real deal when it comes to a base for top coats
It can be tinted so if your slates are going to be a mid red, you can add the appropriate colour so you don't have to do coat after coat of your chosen finish
The zinser primer dries very quickly ....if it looks patchy consider putting two coats on before your top coat .......
Make sure that top coat is suitable and not cheap crap as your roof really takes the sun and rain and this is a job you want to last
As I said it's intensive work and may cost you several grand