Identify and Prepare the Gap

all right so I'm up here today got to resolve a problem with something has pecked a hole right here and we've got to try to fill this hole stop this before we paint this house right here this piece of backer rod fits that space very well so I'll just cut this piece of back Rod you know put it there this is a piece of hybrid backer rod from sashco what you want is a sealant to to um or caulking to stick to the the two sides the two edges that way any expansion