I’d like to replace this concertina “door” that separates my bungalow’s porch from the rest of the house with a real internal door.
The reason is to reduce drafts and so I can a fit a cat flap in this door. The cat can then leave through a open window in the porch.
The frame is 750mm/29.5in wide.
Would a 726mm/28.6in wide door fit into this gap and open properly?
The frame is 60mm deep. The door I was considering is 35mm deep.
I’ve checked other advice sites. Some said doors need to be 6mm smaller than their frame, others said 50mm.