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Unread 04-21-2022, 09:28 PM   #1
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travertine grout and backer rod use

Trying to grout new travertine coping around our pool. the travertine is 12x12x1. grout lines are approx 1/4 to 3/8 wide.
Can i use backer rod to fill 1/2 the height of the grout line and then grout over it instead of filling the full 1" heigth of the travertine ?
I know backer rod is used with caulk, but what could prevent it from beeing used with grout ?
Thanks for any help.
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Unread 04-22-2022, 12:10 PM   #2
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Hi Jean,

I would grout it solid. Backer rod is definitely for something that's flexible.
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Unread 04-22-2022, 12:20 PM   #3
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Note that the grout helps stabilize the whole tile installation and especially the edges to help prevent a heavy load from cracking an edge, so having the joint full is desired.
Jim DeBruycker
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Unread 04-22-2022, 03:11 PM   #4
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Hi Jean. You are talking about grouting between the coping pieces alone? The joint between the coping and whatever is on the adjoining deck needs flexible sealant. There you could use the backer rod. Like John and Jim have said tho, the coping stone needs full grout. Why are you looking to do it like this?
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Unread 04-23-2022, 10:42 AM   #5
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@ Jerry
My question was in reference to the grout between the tiles; i know the side that touches the deck needs a flex sealant.
Since the tile is 1" thick, i was thinking about putting a backer rod on the bottom an grout about 1/2" tall. That is what i will do on the deck side where the sealant will be on top.
So I was just wondering if there was a drawback to doing it this way on the grout sides also, instead of filling the entire 1" height.
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