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Old 06-18-2014, 02:39 PM   #16
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Diy


Tscarbrough,

Thanks for the website that you had mentioned on flagstone laying! it had a youtube video on there with two guys laying bluestone with wet mortar ontop of the well compacted crushed gravel. They laid the bluestone into the wet mortar and that look to be the best alternative to transitioning flagstone from concrete sidewalk to solid crushed gravel with wet mortar bed and then mortaring/tuck pointing joints.

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Old 06-18-2014, 03:26 PM   #17
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Diy


Right, the problem will come when you use mortar to fill the joints. Use a polymeric material instead.
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Old 06-18-2014, 04:29 PM   #18
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Diy


can you explain why the mortared joints doesn't work well by filling joints as appose to the polymeric sand? Also i'm laying flagstone on her front porch & steps that require
mortared joints and if i use polymeric sand on patio and mortared joints on porch i might have two different looking joint materials and color.
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Old 06-18-2014, 07:03 PM   #19
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Because you are mixing a flexible pavement foundation (compacted base, wet set stone) with a rigid pavement jointing material (mortar). Wet set stone over a compacted base is going to move. When it does, if you have a hard joint (mortared joints), they will also crack. Your joints, especially with the random width joints of flag, need to be able heal them selves when it moves around. A polymeric will usually do so, if you use the one tailored to your joint sizes.

I am not a fan of polymeric sand for concrete pavers, but they work for wide, random joints.
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Old 06-19-2014, 08:37 AM   #20
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Diy


if i go with the polymeric sand on all the flagstone joints included the porch and steps to match patio....how do i get the polymeric to stay in place on the front edge joints of the curved steps? Also will the polymeric sand be more likely to come loose in the step joints from constent traffic?

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Old 06-19-2014, 10:09 AM   #21
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Diy


On a rigid substrate, you use mortar.
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Old 06-19-2014, 12:25 PM   #22
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Have you ever use the two for the same project....if so what did the color from two different joint materials look like? I guess one would be smooth and the other gritty
looking?

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Old 06-19-2014, 01:40 PM   #23
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I have not, but I have seen it done. It certainly looks different, aside from the color even.
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Old 06-19-2014, 03:46 PM   #24
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yea i might just have to go with the mortared joints and if they crack later i'll just have to repair them. with the full mortared bed under flagstones...i don't forsee them moving that much do you?

Heck nothing is a sure guarantee these days! We would be lying to the customers if we told them that.

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