As always, tried the search but nothing definitive - i have applied sound deadening and then 19mm Closed Cell Foam (K-Flex ST) in the sides of the van. I have put 19mm foam on the side opposite the sliding door at the bottom of the sill - but just realised, this may not be the best idea. Are there drain holes or anything in there, in case water collects and wants to escape?
My plan is to fill the rest with polyester isolation anyway, but at least that can breathe - i want to ensure i don't block anything at the bottom of the doors.

My plan is to fill the rest with polyester isolation anyway, but at least that can breathe - i want to ensure i don't block anything at the bottom of the doors.

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