We installed a tongue and groove pine ceiling, and for 3 yrs we had 1. Coat of sealer on it, and it started to look really dry, so we pu several coats of varathyne on it. And now we are hearing loud cracking, and a in a few boards it has pulled the tongue and groove apart, what is wrong. We have electric heat. We have had this ceiling for 4yrs, and had no problem, what do you suggest
It could be that this is just and extremely cold year end causing some issues. Be sure that there are no ice damns on the roof and that the vents are working properly. Not familiar with varathyne, but it is probably an oil based product that may have sealed the boards up so much that they can’t allow moisture out and may be messing with expansion and contraction of the boards.