Does anyone know a good contractor in the Effingham, NH area who works on old barns?
What should be be checking to be sure the person knows what they are doing? There is serious sill and post damage. Is anyone else in our area working on their barn or having work done? Thanks, Chris

Your location is quite close to a whole bunch of timberframers, many of whom do barns (and windows too). there is a long running issue of numbers, MA vs NH for timberframer population.
check the TFBC, timberframe.org