DIY Doctor UK DIY Forums

Hi folks! This is my first time I write on the forum, but I've decided to share my emotions. I am building a house and when the question "how to block the roof?" arose my friend advised me to use Shinglas. But to lay Shinglas, you need a backing. I bought Russian Shinglas, they are cheaper there, in fact, as the substrate. For substrate I used rubitex EKP 5.2. Has anyone used it and did I make the right choice?

Thanks for your attention!