Knockdown-fog Coat First?

MCComplete

I remember seeing a house where knockdown was being applied that they did a fog coat first(sprayed texture in a manner that resulted in a very fine texture finish). After drying, they sprayed again and did the knockdown.
Is doing a fog coat a good idea?

1KingOfDrywall

waste of time. Unless the area underneath the "fog coat" is really bad and in need of a tack coat or something......not sure why anyone would waste their time. Was this a restoration project?

drywaller74

are you sure it wasn't primer?

MCComplete

Thanks for replies. Sounds like it is not a recommended step.
It has been several years ago when I observed them spraying, and they said that they were doing a "fog" coat. It was new construction.

1KingOfDrywall

you said it was a few years.....any chance your memory is getting a little "foggy"....hehe
On a serious note though, as I said I never really heard of that.
Sometimes on a ceiling that is already painted for example, you need a tack coat-something the texture can stick to and dry to. I have pre sprayed a surface with easy sand durabond with a fine mist and when that dried, I lightly sanded and applied the desired texture.??
Oh well, hope this helped out.

MCComplete

Yes, the memory may be somewhat foggy. Liked the humor.