It seems like there was once a time when almost every home had a mail slot. Often it was in the front entryway door or sometimes built right into the wall where there was a place inside the entryway closet to collect all the mail.
It was a familiar sight to daily see the pile of mail scattered all over the front entryway floor under the mail slot.
As homes became more energy efficient these mail slots where just another place where too much air exchange could occur. Whether they make more energy efficient ones I do not know, but if they exist they are not very common.
Perhaps people just got sick of bending over to pick up their mail.
Regardless, on a recent inspection, I found this approach to a “mail slot” quite interesting. It made me wonder why I had not ever seen it before.
Indeed, it was open on the inside.
Charles Buell, Real Estate Inspections in Seattle
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WA State, Home Inspector Advisory Licensing Board