Evaluate Primer Need for Adhesion Issues

and I'm going to be using a primer on this wall and um I get questions all the time do I need to Prime my walls before painting so I'm going to talk about you know multiple scenarios and whether you need a primer or not so I'm going to talk about you know uh primers in general I'm going to talk about one aspect of primers primers they promote adhesion so if you're gonna have any type of adhesion issues yes you're going to need a primer this wall right here has been a freshly painted white wall it's flat paint and do I need to Prime this wall if I'm going over with an interior paint over the top of that I do not need to Prime that wall because I don't have any adhesion issues it's a fresh coated painted surface now if this wall itself was say a high gloss paint or a semi-gloss paint or some type of trim paint on there that would cause my top coat going over the top of that to probably have some type of adhesion issues it wouldn't Bond very well I'm going to need to Prime that to get a good bite or a good bond with my top coat if I have any type of contaminants on this wall if I've got a grease on the wall if I've got anything on this wall that could cause any type of adhesion issues then yes I'm going to need a primer on this wall itself now once again this is a freshly coated wall it's nicely done it doesn't have any adhesion issues under this Fresh coat of paint putting a top coat right over the top of that does not require a primer so another thing I'll talk about when it