Questions about EPS concrete

[stefand]

I also have it very uneven and cramped. But good with tips on different solutions. That way I'll probably find something that fits.

 

[Mjärn]

My craftsmen laid EPS concrete 2 weeks ago and it hasn't been primed yet as far as I know. According to industry regulations, the EPS concrete should not remain exposed for more than 3 days. Within 3 days, the self-leveling compound should be applied. It's frustrating as a customer to discover things like this. The craftsmen can say anything to make you believe that what's been done is correct anyway.

Ts, how have things gone for you since 2019 when the thread was started?

 

[Rickard.lj]

My contractors laid EPS concrete 2 weeks ago and it hasn't been primed yet as far as I know. According to industry regulations, EPS concrete should not be left open for more than 3 days. Within 3 days, the levelling compound should be applied. It's frustrating as a customer to discover things like this. Contractors can say anything to make you believe that what’s been done is correct anyway.

Ts, how has it gone for you since 2019 when the thread started?

So true, but no worries, just prime properly before they are supposed to put on the levelling compound, have they put the reinforcement in yet?

 

[Mjärn]

So true but no worries, just prime properly before it's time to plaster, have they laid reinforcement yet?

No, just esp-concrete. I think there are industry standards for a reason. It might be important to have the flooring guy do a moisture test before he does anything. There are some cracks here and there and it feels dry.

 

[TheGame]

No, just esp-concrete. I think there are industry standards for a reason. Maybe it's important to ask the floor installer to measure humidity before doing anything. There are some cracks here and there, and it feels dry.

Why measure humidity?
You prime so that the concrete doesn't dry too quickly since eps concrete dries quickly.
It should be dry. If it hasn't warped and feels hollow, it's probably fine.

 

[Mjärn]

Why measure moisture.
One primes so that the concrete doesn't dry too quickly since EPS concrete dries quickly.
It should be dry. If it hasn't warped and feels hollow it's probably fine.

Then it should be dry all the way down since the time limit has been greatly exceeded. Primer should have been applied from the start.

 

[nino]

The reason it is 3 days is that epsn dries too much, primer or a plastic cover allows it to stay longer. What is the temperature in the space?

 

[Mjärn]

The reason it's 3 days is because epsn dries too much, primer or a plastic cover makes it last longer
What is the temperature in the space?

There is neither primer nor plastic cover. It's cold in the room because the ventilation is completely open.

 

[Anonymiserad 405730]

It will hold if they use self-leveling compound on a reinforced structure; covering with plastic now or rushing with primer now is pointless if it has been standing for a few weeks because it has dried out.

 

[Mjärn]

It will hold if they level an armed construction, covering with plastic now or stressing with primer now does no good if it has been standing for a few weeks because then it has dried out..

But if it has dried out then it's crap..

 

[Anonymiserad 405730]

But if it has dried out, then it is crap..

What becomes crap?

 

[Mjärn]

Read that it becomes dry and that it may cause moisture migration if one waits more than 3 days. Not sure if it is clinically accurate though.

 

[Anonymiserad 405730]

Read that it becomes dry and that it can cause moisture migration if you wait more than 3 days. Not sure if that's clinically accurate though.

Drying out it will, regardless if no moisture is added from the surroundings..
All concrete products cure and dry out..

 

[Mjärn]

It will dry out regardless if no moisture is added from the surroundings..
All concrete products cure and dry out..

Okay! But industry regulations exist for a reason I think. If they've set 3 days, I assume it becomes worse if you wait 2 weeks. But thanks for the answer!

 

[Anonymiserad 405730]

Do you see large cracks in it or major damage from mechanical stress now that they have been working for several weeks in the bathroom?
If you don't, then there is absolutely no danger as this is just a light fill and not a structure in any way; it is the self-leveling compound that will make your floor durable..