one reason is better sound insulation, ceiling is stronger, joints will never crack, better for inlayed LED profiles it makes no gap when you cut places for led profiles or inlayed curtain rails that this ceiling will have. as you can see vents are designed for two layer system
hey, for first layer i use 25mm screws and for second layer 41mm, longer ones yes, and much more of them, when you hit ceiling with fist it sounds very solid without any metal rattle sounds !
@@Visionist feel free to ask any questions, thanks for viewing! I will upload more work on this ceiling later, work around corners, inlayed leds, MUCH work to do alone now.
