I'm hoping someone can offer me some advice. I've recently installed my own flat roof using Rubberall, which I found to be very easy to do myself and compared to other products I was looking at, it was a good price for the life expectancy. I used PVC sure edge trims around the outside but it's only been three months and they've warped quite badly to the point that the front part has come right away from the roof! I've been told now that this can be a problem with using PVC for this. I've been told of another product which is environmentally friendly called Quicktrim. I wondered if anyone had any experience of these?