That product in the link is new fast setting concrete The one in your pics looks like Calsium sulphate? Do you think you could have the right manufacturer just the wrong product link ?
I asked the builder exactly who and what screed it was, I took this picture of his phone showing the people who did it.. so it is what they say but it looks and acts very similar? Sent from my iPhone using Tapatalk
Well having completely no trust in what builders say or do when it comes to anything flooring related I would still treat it as Calcium sulphate and use Calcium sulphate based products on it to be safe
It’s a liquid cement. Same as the one we had that cracked in the same way. No Laitance and dries quicker but cracks like mad when you turn the heating on! They guaranteed us it wouldn’t crack or move anymore so we filled the cracks and screeded over it. No problems so far but was only around 6 months ago! Sent from my iPhone using Tapatalk
It’s defo dark enough to be liquid cement. Would of thought a dpm would of been fine if it was tho? Sent from my iPhone using Tapatalk
To be fair they said it didn’t need grinding but if I had a grinder I would of given it a once over! Looked a bit patchy!! Sent from my iPhone using Tapatalk
I'm unsure tbh, if there isn't any expansion joints.. who's job would it if been to have them in place.. like I say this isn't my job I was just helping out today but I like to know for future reference. And it might help out other folks who read this Sent from my iPhone using Tapatalk
lol nah! But I might make a tea with some whole milk tell me how this test works again? Sent from my iPhone using Tapatalk
That's not Calcium. That is a cement based flow screed. They claim to dry quicker, well yes they do, they harden quicker! Not dry as in fit on quicker. They also apply a curing agent to the surface to stop it drying out to fast. This has to be removed by grinding. The cracking will be down to it being poured and then sunlight hitting it within the first 48 hrs. Not really something to worry about as it should have rebar running through it. I will presume it is over a block and beam subfloor? These products are not new. Been around a good 4 years now in U.K. Agillia type c for example.
Good to know it needs grinding. We were told it didn’t but it was a pretty inconsistent finish. Sent from my iPhone using Tapatalk
Yes, you can DPM them, but only after grinding it. As for the cracks, mix a pu based dpm with sand and pour down cracks. The moisture in the sand will cause the PU to expand and it will fill and glue the subfloor together. Scrap off excess that foams out the top of the crack.
