[reachandshine]

Flagged and unflagged brushes whats the difference?

[Sapphire Window Cleaning]

Do you mean flocked?

[Alex Gardiner]

Flagged is the term that brush manufacturers use. Flocked is what we window cleaners tend to call them, I'm not sure why!

[Sapphire Window Cleaning]

Right you learn something new each day (on here) lol Hi Alex.
Flocked/Flagged bristles are split at the ends, thus making the brush softer and the other is mono filiment is that right Alex? they are stiffer bristles that aren't split at the ends.

[Alex Gardiner]

Right you learn something new each day (on here) lol Hi Alex.
Flocked/Flagged bristles are split at the ends, thus making the brush softer and the other is mono filiment is that right Alex? they are stiffer bristles that aren't split at the ends.

Spot on  , except the monofilament isn't stiffer because the bristles aren't split - rigidity is dependent on the thickness of bristle.

[Sapphire Window Cleaning]

I always use flocked/flagged brushes for windows and my sil brush for guttering, fascias and conservatory roofs.
Suppose its all down to personal preference really.