How-to Guide For Taping Off-Angle Corners, Slanted, Cathedral, Tray and/or Vaulted Ceilings Taping drywall corners is where hobbyists and non-professionals have the most difficulty. 90-degree corners, both inside corners and outside corners are quite common. However, off-angle corners (any corner that isn’t 90-degrees) are not as common and this is where most non-professionals have the […]