The Mountain Man STONE Trick That Keeps a Cabin Cool in Summer AND Warm in Winter — No AC Needed

[00:00:00]There's a black stone sitting on top of my wood stove right now. Flat one about the size of a big dinner plate. Dark as a moonless night and smooth from a 100 years of handling. My grandfather Ezra carried that stone up the lolo on a mule in 1920 one. And I'mma tell you something that's going to sound like foolishness at first. That one stone keeps his cabin warm when it's 30 below outside. And it keeps it cool when July comes and the valley's baking. The same stone. No power, no bill, no machine of any kind. Now I know how that sounds.

[00:00:36]Warm in winter and cool and summer from the same rock. But stay with me cuz by the end of this you're going to understand the one thing the old-timers knew about heat that the fella selling you a furnace and the fella selling you an air conditioner both hope you never figure out. My name is Silus Mercer.

[00:00:54]I've run a trap line in these mountains of western Montana for 40 years. Same line my father ran. Same line his father cut up the lolo. And I'd rather send you home with something that works than send you home impressed. So before we go on around here when somebody pulls a chair up to the stove, their family pull up a chair. Hit that subscribe if you want to seat this fire and tell me in the comments what the winters do where you live. Ruth reads them with me of a morning. Every single one. All right, stay with me. Here's the thing you got to understand first because everything else hangs on it. A stone doesn't know what season it is. It doesn't know if it's July or January. All a heavy thing knows how to do is hold a temperature and give it back slow. That's the whole secret. That's it. The old-timers called it nothing at all. They just did it. The school books call it thermal mass. A heavy thing soaks up whatever you give it and lets it back out slow for hours long after the fire is dead or the night air is gone. Once you understand that one fact, both halves of the year take care of themselves. Let me show you. In the winter, here's what most folks get wrong. They build a fire and they try to heat the air, but air don't hold heat worth a darn. You let that fire die at midnight and by 3:00 in the morning the air is cold again and you're shivering under the quilts. So what did the old-timers do? They didn't heat the air.

[00:02:24]They heated a stone. A short hot fire and you set your stone right up against it or on top of the stove like mine.

[00:02:31]That rock drinks the heat in. And then all night long, long after the fire is just coals, that stone is given its heat back to the room, slow and steady, like a warm hand on your back. And the smaller version of that same trick will change your winters forever. You take a flat stone, a soap stone's best if you can find one, heat it by the fire for an hour, wrap it in an old wool rag so it don't scorch the sheets, and you put it down at the foot of your bed 20 minutes before you climb in. My Ruth's done it 40 years. That bed is warm as toast when she lays down. And it stays warm past midnight. The bigger the stone, the longer it holds. A brick from your own yard, heated in your own oven does the same exact thing tonight for nothing.

[00:03:17]Now, the natives up here taught the first trappers this long before anybody had a cast iron stove. They'd heat rounded river rocks in the fire and bury them shallow under the sleeping robes.

[00:03:29]Stone's been keeping men alive in these mountains a lot longer than the power company's been sending bills. Remember that now. Same rock. Summer, here's where folks jaws drop. In July, you do the opposite. You don't heat the stone, you cool it. That same heavy mass that held the fire's heat all winter will hold the cool of the night all day. So in the evening, when the mountain air comes down cold, you let your stone and your thick walls drink that cool in.

[00:03:58]Then at first light, you shut the place up tight. Close the windows, drop the shades on the sun side, and that cool stays trapped in the stone walls, and it bleeds back into your rooms through the hottest part of the afternoon while your neighbors air conditioner is roaring and his meters spinning like a top. That's why the old cabins and the old stone farmhouses stayed cool in summer without a machine. It wasn't luck, it was mass.

[00:04:25]thick walls, stone earth. They're slow.

[00:04:29]The heat of the day can't get through them fast enough to catch up before the cool night comes around again. And if you want to see that taken all the way to the end of the line, you go underground. A root cellar dug 6 8 ft down. The earth itself is the biggest stone there is. Down past the frost line, that ground sits at 50 55° all year round. Don't matter if it's a hundred above or 20 below up top. That's the same trick. Just oos and the whole mountain as your stone. The old-timers kept a winter's worth of food down there. Cool in summer, never freezing in winter, and never paid a scent to do it.

[00:05:07]Now, here's the part most folks skip, and it's half the battle. A stone holds what you give it, but your walls have to keep the weather out, or you're just heating the sky. The old way to seal a log cabin is a thing called chinking.

[00:05:21]And the recipe is older than this country. One part clay, one part coarse sand, one part lime, and a good handful of straw or animal hair worked in to hold it together. You pack the big gaps with wood wedges or small stones first.

[00:05:36]Then you press that mud in over it. The clay grips the sand gives it body. The lime keeps it from cracking. And the hair knits it like a rope that seals a wall so tight the wind can't find its way in. A drafty wall will beat the best stone in the world. Seal first and one more. Simple as it gets. Heat one room, not the whole house. The old cabins were one room around one fire for a reason.

[00:06:00]You don't warm a barn to keep one man comfortable. Close off what you're not oozing. Live near your heat in the cold months and your stones got a fighting chance. Now, here's where I tell you straight, cuz I won't sell you a miracle. This won't turn a leaky modern house into a vault overnight. If your walls are thin and full of gaps, the stone can only do so much. Seal up first, then add your mass. And a hot stone is a hot stone. You wrap it before it touches a sheet. You keep it off anything that'll scorch. And you don't hand a glowing rock to a child. Up here, a mistake isn't an opinion. It's a consequence. But the principle, the principle never fails because it's not a gadget. It's physics. And physics doesn't break down. Doesn't need a part ordered. Doesn't quit when the power's out. The fella selling you a furnace.

[00:06:51]And the fella selling you an air conditioner selling you two machines to do what one stone has done for a thousand years. And every winter you run that furnace. And every summer you run that AC. Somebody in an office a long way from here gets a little richer. That stone on my stove never sent me a bill in its life. So that's the whole of it.

[00:07:12]Heat the mass, not the air in winter.

[00:07:15]Trap the cool and the mass through the summer. Seal your walls. Live near your fire. And let the heaviest thing in the room do the work the old-timers always knew it could. Tell me in the comments, what are you heating with right now? And what does it cost you every month? I want to know. And if your grandmother ever put a hot stone or a hot iron in your bed when you were little, tell me that, too, cuz I'll bet some of you remember it. I read everyone. Ruth, too.

[00:07:42]And next time, I'm going to show you how those same old-timers kept a whole winter's worth of meat from spoiling without a lick of ice or a drop of electricity. Most folks today would lose it all in a week. Subscribe so you don't miss it. The old-timers didn't know less than us. They just couldn't afford to be