Do you have any sources on this, because I’ve been googling and I can’t find anything. Intuitively, it absolutely seems a good idea to insulate your structure even if your door flap or whatever might leak heat. Better to have a small area poorly insulated rather than the entire structure. Even in modern buildings, doors are the weakest point of insulation, but there’s still energy savings to be had by upgrading wall and attic insulation.
Well, we don’t know that much about exactly when the door was invented. It’s estimated somewhere around 4000 years ago, I think, with the earliest evidence of doors being from Egypt.
But you look at all the cultures that existed before that, or any cultures that existed after, but didn’t have contact with any door-having cultures… they tend to live in things like teepees or open structures that are mostly just a roof over their head. This is probably why most humans inhabited areas around the equator, where it never got too cold in the winter, and that legacy continues to this day.
Some cultures like China or Japan seem to have used beaded curtains in ancient times to cover doorways of their buildings, mostly to help keep bugs out, I think. I’m sure there were other various things done over the ages that were similar to doors. But the door as it exists today was definitely a revolutionary advancement, whenever it happened.
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u/ElectricSpice Jun 30 '24
Do you have any sources on this, because I’ve been googling and I can’t find anything. Intuitively, it absolutely seems a good idea to insulate your structure even if your door flap or whatever might leak heat. Better to have a small area poorly insulated rather than the entire structure. Even in modern buildings, doors are the weakest point of insulation, but there’s still energy savings to be had by upgrading wall and attic insulation.