They sort of do offer the protection, the problem is that you need to place full tile windows on the corners.
Thought I’d drop this here due to fusion guide and such
Single-Directional Depleted Uranium Windows ONLY BLOCK RADS if they’re sealed in.(Screwdriver/Crowbar/Screwdriver) (And corners covered)
For Example -

You need to have the corners covered as well, also walls let rads through, so using walls as one side shouldnt work to block rads fully.
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