I want to build shelves into an alcove, but the corners are not square. What is the best approach to this?

1 Answer 1


"Not square" can mean two different things: not a right-angle, or rounded.

If the walls are not at right angles, you can use a T-bevel to measure the angle between the walls. If you don't have a T-bevel, you can hold a piece of light cardboard against one wall and fold it so the crease is against the other, which you can use as a template for cutting the shelves.

If the corners are rounded, I'd use the cardboard again: estimate the radius of the corner, cut a quarter-circle of that radius, and check how well it fits into the corner. If necessary, adjust the estimate and repeat. Then use the quarter-circle as the template.

  • 17
    Make sure you do this at each height you plan on putting a shelf, just in case your walls aren't the same angle from floor to ceiling.
    – Doresoom
    Oct 14, 2010 at 13:24
  • great tips, thanks guys. I have adjusted the question title to be more useful.
    – Mild Fuzz
    Oct 14, 2010 at 15:04

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