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Why both grout and mortar?

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Why both grout and mortar? GreatArtist 11-22-2006
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Posted by GreatArtist on November 22, 2006, 7:48 am


Why do you have to lay down tiles with mortar and then put grout
between the tiles?
Why can't you just put mortar between the tiles?
Is grout more waterproof than mortar?
Can you use mortar as a substitute for grout and then put a penetrating
sealant on top of the mortar?


Posted by m Ransley on November 22, 2006, 8:43 am


Maybe you can but it is a 2 step process, set tiles wait a day then
grout.


Posted by Brian on November 22, 2006, 8:56 am



GreatArtist wrote:
> Why do you have to lay down tiles with mortar and then put grout
> between the tiles?
> Why can't you just put mortar between the tiles?
> Is grout more waterproof than mortar?
> Can you use mortar as a substitute for grout and then put a penetrating
> sealant on top of the mortar?

I might be wrong, but I don't think you can put sealant on mortar. The
obvious answers are that

1. Mortar is messy
2. Grout can be colored to people's wants and needs
3. Grout is much more forgiving
4. Grout does not stick to mortar

Mortar is formulated to bond masonry units together. The main
ingredient of mortar is Portland cement. Grout is not mortar and not
concrete either. It is in between like a soft concrete. Grout has a
certain fluidity because it must fill in narrow spaces well. Mortar
does not have the same consistency or fluidity as grout. Plus, grout is
made of finer materials that are similar to mortar, but the makeup of
grout is different. Mortar just doesn't flow the same.


Posted by Nick Hull on November 22, 2006, 9:32 am



> Why do you have to lay down tiles with mortar and then put grout
> between the tiles?
> Why can't you just put mortar between the tiles?
> Is grout more waterproof than mortar?
> Can you use mortar as a substitute for grout and then put a penetrating
> sealant on top of the mortar?
>

IIRC, grout doesn't shrink

--
Free men own guns - www.geocities/CapitolHill/5357/

Posted by Joseph Meehan on November 22, 2006, 9:59 am


GreatArtist wrote:
> Why do you have to lay down tiles with mortar and then put grout
> between the tiles?
> Why can't you just put mortar between the tiles?
> Is grout more waterproof than mortar?
> Can you use mortar as a substitute for grout and then put a
> penetrating sealant on top of the mortar?

They both have different jobs and they are both made to do their jobs
better than the other. If you want to use second best materials, go ahead,
but don't be surprised if it does not work out as well as you hoped.

Why do you want to avoid grout. Do you think you will save some money?
It will not be much.

--
Joseph Meehan

Dia 's Muire duit




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