Thread: Architraves,Skirtings

Mic - that is a great method but not good if the wall is not perpendicular.
For younger readers (!!) walls not being perpendicular is more likely to be the result of warped bottom plates and studs that are not dead centre and/or have warped over time. Hardwood frames built in the 1950s can be an extreme example of this with the plaster board doing some very strange things at the bottom and the top.
Anyway, I do agree with MIc, that is the best way to 'scribe' the line but just check first.
Cheers