Adding molding to ceiling beam - how to offset curve?
We're in the final stages of a project to replace the kitchen ceiling in our 1920's house. When the plaster came down, the contractor saw that the ceiling was beginning to sag. He installed a post and beam across the center of the room, leaving it exposed per our request when he sheetrocked the ceiling. We are in the process of casing the beam with stained planks to make it a design feature.
The celing had already sagged a bit before the beam was added. A plank installed along the beam with the bottom edge level will have a gap between the top of the board and the ceiling at either end, with one side being more severe (offset of about 1.5", the width of the room is around 94"). The first plank has been put up and looks fantastic, but we are struggling with the molding. When we held the molding up flush to the ceiling, it's really apparent that it is not at a uniform distance from the bottom of the beam and it seems to call attention to the ceiling curve. We have considered moving to wider molding and trying to shave the top to contour it to the shape of the ceiling, which would keep the bottom edge of the trim uniform. We could also minimize the curve to the molding and try to shim the top end with something we could stain to the same color.
Has anyone else encountered this challenge? Is there any hope we can conceal this "feature", or shall we just mark it down to yet more character to this house? Embrace the ceiling sag? Thanks for any ideas you may come up with!