Wow thats pretty bad, i wouldn't even use those as fence material. I'd send it back.
It looks like a hungover squirrel threw up his morning oatmeal all over his house.Those aren't even knots, let alone small ones. The gigantic holes have been filled with something that's guaranteed to fall out once the sauna is used.
RUBBISH - send it back , find a different supplier.
- xedos