Adding to concrete?

[deniseann]

Hello
I had an area of concrete laid ( approx 10ft x 4ft) last week. It has been laid about 1" too low so that water is sitting on it. The contracter has been back to look at it and intends to correct the problem by laying a further inch on top with a gradient to the adjacent drain. Can anyone advise whether or not this is appropriate please and what should be done?

Thanks for your help

 

[annastarr82]

Hi,
It is the obvious solution,however I am not sure the second layer will be stable or whether a smoother concrete should be used.Your contractor should know best about this.
Good luck anyway
Anna

 

[deniseann]

Thanks for your response but that was the question really - will an additional 1" bond to the original and will it be sufficient to withstand frost or will it be too thin?
Any advice / info gratefully received

 

[freddiemercurystwin]

Create a new thread in the Building Section or ask the mods to move it.

 

[deniseann]

Thanks

 

[themiddleagedun]

Hi Deniseann
To answer your question... No there's no way an inch of "topped up" concrete will bond to the existing. Not a chance!

Not the answer you wanted to hear i'll bet.?

 

[RonnyRaygun]

Agreed.

Water ingress will cause problems at the junction between existing and new slab, and it'll soon spall...that's if the general stresses of foot traffic don't damage it first.

If it's his mistake I'd be asking him to break it up and do it again...but he isn't going to be happy about that.

Or you could put down slabs onto what's already there instead depending on what it will be used for?

 

[deniseann]

Hi there both
thanks for answering - you're right not what I wanted to hear but pretty much what I suspected
As you suggest I may go for the slab option.
Thanks again