we have built a new house and roofer has fitted velux and started to slate roof, but water is running in like a tap, he says it will stop when slates on, but surely it shouldnt leak what if it leaks when plastered slate can be replace but what a mess inside , hubby says he hasnt fitted felt properly but roofer doesnt agree says were fussy
I am not a roofer but I have installed a Velux window - just the one mind - but I can't see a properly fitted Velux Window allowing the rain in - not from the window opening - before the slates were fitted.
This link might help you understand where and how the rain water is getting in - then you'll have something precise to discuss with the roofer.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix roofing.