hi there, i'm hoping that someone in the know may be able to give me some help on how to make some drainage holes in the frame of my upvc front door. it has one of these weathersheilds on it, but it's not the correct length so roughly 2 inches of the door isn't protected. therefore my carpet is wet in heavy rain. i was told not long ago that most doors like this have drainage holes in the door frame but i was never told how i could make them, only that it was possible. i have a drill etc, but i'm not sure how to drill the holes. do i need to drill at an angle so that the hole will come out of the exterior part of the frame, or can i get away with just drilling straight down? any help would be great as i'm a bit new to this diy stuff! cheers!