We have a log cabin located in VT. It was built around 1968. We purchased this in 2001. We are not sure when the last stain was applied and it has never been chinked. We have drafts coming in when its cold and windy. We also noticed very small black bugs up on the 2nd floor area. They look like oval shaped poppy seads. What could they be and is there a way to get rid of them?