First of all, I am not exactly sure what the door is called. I have a metal outside door leading to steps into my basement. I have always just called it the basement/cellar door but it seems like other people refer to it as a storm door or bulkhead ? It looks like
(via google images).
Names aside I am looking to put a better seal on the door when it is closed. I can see quite a bit of daylight at the bottom and sides of the folding doors when they are closed. I want to keep the gaps as small as possible to hopefully keep out insects/pests from crawling through. Searching has just lead me to instructions for installing the door which I don't need.