Purchased abacus backer boards+ waterproof kit Backer board adhesive and no more leaks bath seal ( hopefully the bath seal does its job) . No fitting instructions for installation of the backer board and everyone has different methods of fixing. And I didn’t want 100s of holes in my masonry as I’m a DIY Person and not a professional installer. Backer boards are very good quality but they are a nightmare to remove sealant from them (sealant did not take to the new bath so had to remove and replace the boards with sealant on . This isn’t a manufacturing fault . Very good service and communication. Eco friendly packaging very good What I have purchased looks very good quality Would recommend and I will use them again ( just instructions needed )