They make tools to cut the grout, or use a dremal. A sharp utility knife works also.
the wrong one. They should have one with a flange around 1" so that is will fill up the hole. Take a broken piece to the place where you bought the new one from and let them get one that has the flange aprox that size***UPDATE***
So I managed to knock out the rest of the ceramic from the original holder, and a good amount of any loose/cracking plaster in the hole. Now i have a relatively "clean" hole that is 6 x 4.5 x 1 deep. I purchased a new toilet paper holder, and size-wise it will fit, but it isn't nearly as deep as an inch. It only goes back about 1/4" and the recessed part is only 4"x4". What do I fill in this 1" deep hole with to be able to adhere my new paper holder?
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Well that's not a "clincher" but it will work. YOU MUST USE MODIFIED THINSET MORTAR for this installation. NOT mastic, NOT premixed thinset, NOT brick mortar, NOT construction adhesive, NOT silicone.:no:.......the wrong one.
Will this brand/type of mortar be the correct "modified thinset" for this application?:YOU MUST USE MODIFIED THINSET MORTAR for this installation.
How many parts, water to mortar do you recommend to "mix it fairly dry" vs the average mix you would do?Mix it fairly dry.
I have no idea. I would just start off mixing until it gets pasty. Thinset will run and sag fairly easily so you'll just have to play around with it a little. Sorry I don't have a better answer for you on that score.How many parts, water to mortar do you recommend to "mix it fairly dry" vs the average mix you would do?