Answers

The logs will always expand and shrink with temperature fluctuation causing the popping sounds.

Too many variables with this one. Call Ryan at 877-788-5647 for help on this.

Yes it would be fine to go straight through. Be sure to caulk or chink around opening. If it is a gas dryer you will have to use a heat resistant caulk.

If you need log replacement call Ryan at 877-788-5647. If you are looking for finish work like stripping or washing and staining call Mike at 866-670-3020.

They could possible continue to rot. I would dig out as much of the rot as possible and apply a good heavy coat of Shell Guard borate at the very least.

Not sure either. Call Ryan at 877-788-5647.

Not sure what your question is because it all didn’t come thru. You should contract a local company that specializes in foundation work.

I would recommend stripping the entire entry and applying a borate treatment to stop the beetles.

Strip it. Call Mike at 866-670-3020 for help.

This is one that an architect or structural engineer would need to see. Too many variables.