Build a a DIY climbing cave in your attic or garage

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credit: Lloyd Alter

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We live in a narrow three-story house with the kids' bedrooms at the top, essentially in the roof, so there are knee walls, a sloping section, and a flat section above. I wanted to build the wall in a way that minimized the number of holes I would have to make in the lath and plaster, because it is 100 years old and not in great shape.

I designed the wall to work like an arch, without almost no fastening into the wall. All the weight rests on the floor.