Hi,
I had a 4ft wide set of inward opening upvc doors installed. Hinges are about 6 inches from both the top and botom of each door. Halfway between each set of hinges is a small stubb coming off each door - I could see no purpose for these. However, should these fit into a receiver behind the frame to force the centre part of each doorframe against the rubber sealing strip that is on the roomside of the frame? (Because their isn't one and I begin to think there should be, so that the middle of the door can't flex away from the frame when closed)
TIA