... Bad weather tends to concentrate the ash disposal in areas near the exit doors so there have been a few tons deposited in a few spots over the years.
Harry K
Kinda like the dairy farmers, the field closest to the barn gets the most "nutrients", no matter how much ya try to keep it even.
My big furnace has grates and an ash pan, no sifting needed, just dump the ash pan into an old metal tub every few days, cold ashes go on the lawn or driveway as needed. No fancy glass door to clean, can't see thru cast iron very well. If the stove goes out (seldom between now and late Feb.), I'll scrap the ashes down that didn't fall thru on their own, and go up the ladder and have a look down the chimney.
End of season gets spring cleaning, scrape all soot/buildup off the inside of stove, clean out bottom of stove, check and replace firebrick as needed, full chimney and stove pipe cleaning, etc. Gotta be ready when ya first feel that "brrr it's cold in here" - but do have a quick look down the chimney to make sure critters haven't snuck in and built a nest - ask me how I know this, never mind I'll tell ya.
First fire this year, I lit the stove and a couple minutes later started hearing the roaring sound of the chimney burning, and went outside to see sparks coming out the top of the chimney. Plenty of dew on the grass, and wind carrying everything away from the house, so I watched it and let it burn itself out. It was a scary few minutes to say the least. Note=my chimney is a lined block chimney, freestanding next to but not attached to the house. Id've been more worried and probably taken the hose to it if it were an internal chimney.
Best I can figure, some bird found a nice place for a nest this summer, and dry bird nest material catches fire real easy and burns fast. It won't happen here again.