I have a 100+ year old house and am currently removing all the old plaster walls (ugh!) :eek:, and plan to put up drywall. I am finding, as I remove the plaster, that there are some holes in the old wood walls (exterior walls), particularly at the bottom where the floor meets the wallboards. While I do not think the house is leaking, as the exterior walls do have siding on them and the wooden walls are bone dry...before I put up the drywall, I was wondering if it would be good to caulk the gaps with something, just to ensure that bugs, air, and/or moisture doesn't get in to cause mold and damage the drywall. If so, what type of caulk should I use? I am doing this project to make my house more energy-efficient. I recently replaced all my windows and now I am adding insulation and drywall throughout to the exterior walls - since there is NO INSULATION in them right now. Any advice you can give me will be most appreciated. Thank you!