Coping Sinking?
- Thread starter TheAntebella
- Start date
We were pretty sure the front was mortared, but was it all the way across ? It may just be the front edge and the rest of it is sitting on sand, which washed out allowing the back to sink.
Or water got under there and lifted the 2nd row when it froze, possibly shifting the sand base around to keep them high when the ice melted. Or they are so tight they are just holding themselves up with a small gap underneath.
Or water got under there and lifted the 2nd row when it froze, possibly shifting the sand base around to keep them high when the ice melted. Or they are so tight they are just holding themselves up with a small gap underneath.
Ok.
In my opinion, you need an expansion joint and you need to pull up the high stones to see why they are high.
In my opinion, you need an expansion joint and you need to pull up the high stones to see why they are high.
Pictures of the deck stones being laid?
Was it thinset or was it a thick mortar?
Distance from the top of the poured concrete to the bottom of the stone?
Stone thickness?
Have you contacted the builder to see what they have to say?
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Picture of concrete sub base of corner of concern and then stone laid. Silver Travertine- 1”? Not sure I can go back and measure my spare pieces. I would have to measure that but can do so.
In my opinion, you need an expansion joint and you need to pull up the high stones to see why they are high.
Yes I did. I was present for the entire installation. I took pictures of most everything I could think of.
Def possible. All of it is mortared down. I couldn’t lift them at all. There is a gap between the coping and the decking I will measure it tomorrow. Anything else I should measure or evaluate? Thank you very much I appreciate you!
Ok great. Alot of times they are shoehorned tight in there and getting the first one free is a chore. It would help see if the coping sank or the 2nd row popped up.
MAPR-Austin
In The Industry
This looks like frost heave to me, especially if you have had unusually or extreme cold.
Can you think of any reason the ground under the deck there would be saturated? Different grade/fill, plumbing trench, existing backfill from house construction?
If it is frost heave there is a good chance it will settle back into place.
We have had horrifically cold freezing temperatures for the last three weeks. Two boughts of snow that we blew off the decking asap. I’m in North Carolina and we’ve had teens and 20s for three weeks. It’s finally starting to warm up.
MAPR-Austin
In The Industry
Yep, frost heave is soil expansion due to ice forming. See what it looks like once you're into Spring.
Maybe water got between the concrete and the stone and froze.
Probably just need to pull them out and reset them.
I would add an expansion joint with caulk.
You might need to add some drainage holes in the concrete to allow water to drain.
Normally, mortared stone gets grout.
With no grout, water can seep in and get trapped.
Probably just need to pull them out and reset them.
I would add an expansion joint with caulk.
You might need to add some drainage holes in the concrete to allow water to drain.
Normally, mortared stone gets grout.
With no grout, water can seep in and get trapped.