If the shielded paper was only used on the external/periphery/boundary walls, it should have zero limiting effect within those limits. Internal wallpaper could be just that - paper, matching in colour and sheen etc. of the shielded version, if so wished.
Why not have a shielded room/cubicle for someone who does not want to be bombarded by unseen rays for 8+ hour per day? 
Used intelligently, this could be very useful.
