Applying grout neatly and efficiently - GIF

Applying grout neatly and efficiently.

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Previously:

https://www.homemadetools.net/forum/...494#post104412
https://www.homemadetools.net/forum/...733#post136813
https://www.homemadetools.net/forum/...593#post159072
https://www.homemadetools.net/forum/...576#post132469
https://www.homemadetools.net/forum/...603#post117904

reckon they're getting full depth with that method, or simply filling the top of the gap only?

This is cosmetic only. I am not a small man and I have to say applying grout is the hardest work that I have ever done. Your inconstant push and pull for all you are worth or you are not getting proper penetration. Love it when it's done! Not so much when I am doing it.