Plain tile overlap

Hello Zish, Speak direct to manufacturers Redlands for assistance and guidance for your project needs. I think your over complicated the matter though. Keep it simple always 100mm batten spacing where possible, you shouldn’t open the gauge up by no more then half an inch unless the pitch is very steep above 55 degrees and don’t close the gauge by no more then half an inch. Don’t worry if you stay within these margins your head lap will always be okay, obviously if you got a roof pitch of 30/35 degrees you would never open the gauge up, you would close them up slightly to fit in all your courses of tiles. I would only open up the gauge if the roof is over 55 degrees anything below close up the gauge. Example if your rafter lengths are 2970mm you would close your gauge to 90mm so you have 33 full courses with no cut tiles at the top, if you would go at 100mm you would have 29 courses and a cut course at the top or a large gap between tiles, and the wall meaning your lead flashing will dip into it over time and split. To summarise Id still speak to Redlands technical support team for project assist and clarity on the technical data. Hope this helps, Regards Frankie BT Roofing Services Limited

as Franky above has said dont try to over complicate things and concentrate on your batten gauge generally 100mm to prevent wind driven rain being an issue. personally I will only use 25/50mm battens regardless of what there specs say good luck Alex

Hi, it’s always best to speak to the manufacture technical department with your exact pitch of roof to be sure you don’t affect any manufacture warranty, having said that 100mm batten gauge is the go to gauge but can be closed by around 15mm to get all courses to fit evenly in your rafter length. Thanks Toby Brannon roofing services Ltd

I couldn’t answer it better than the other guy it was spot gauges rarely change on standard roofs