Originally Posted by
jonnyenglish
Looking at the tiles you have chosen on SCG's website, they are the ones that are flat on the back (I was looking at these and also the timber shingle look), so no secondary channel like Monier have to prevent water running under and across, instead they rely on second tile lapping over the join of the first, no problem, BUT...
Your steel-work will have to be absolutely bob-on to allow for correct seating of these (no mean feat with an Ayutthaya style roof). My builder steered me away from these when discussing choice of roof tiles (lighter than using CPAC monier and I really liked the overall look), I'm guessing he thought the team's standard of construction with steel wasn't up to the job, or failing that he had never worked with them before, either way he wasn't keen! That doesn't mean you shouldn't though, these have been around for a while.
I think you'll have to go for the smaller size, as they are more suitable for roofs with greater pitch angle (even though the larger size are generally used for bigger roof areas).