Posted: Mon Sep 22, 2008 3:00 am
Hi everyone one, 
I need urgent help as i have reason to believe that my builder’s work is questionable.
Plan is to lay paving slabs, which should be strong enough to withstand the weight of my car. However the car would not be parked there for long periods of time, it would be used only for washing or cleaning etc and maybe a few nights but no longer.
The builder has dug up the area up to soil level... then put dpm then concrete down. It was suggest this be 4 inch but in some places its more like 2 inches. We have trees nearby and when digging up the area saw many tree roots which we tried to clear out, however some big ones I would guess are still there or will grow underneath such is nature.
I don't think the concrete had dried out yet and it has started to crack up very easy, but my question is this.
With the above laid concrete and then say 2-3 inch screed and then 40mm paving.. would it last very long for the intended use???
What worries me is that the concrete has been laid straight on soil and no hardcore of type1 underneath of any kind. The soil was however compacted but I felt this did not achieve much. Compacting soil, I never heard of anyone dong that?
I would of thought that 75mm hardcore.. then compact down, then 150mm concrete then screed and then decorative paving to finish off. Would this not be stronger and be able to withstand tree roots/ car/ movement etc Previous we had 6ich concrete with 4in hardcore, and this never gave us any problem with roots or car.
Can someone more experiences be able to please advise me?
Is there an option to lay additional concrete on top of the work carried out so far? and if so would this adhere to the newly laid concrete ? Would it be better to break up the laid concrete (easy to do whilst still drying out) instead but this time put hardcore down then concrete?
Hope someone can me out
Thank you
Regards,
Stephen
I need urgent help as i have reason to believe that my builder’s work is questionable.
Plan is to lay paving slabs, which should be strong enough to withstand the weight of my car. However the car would not be parked there for long periods of time, it would be used only for washing or cleaning etc and maybe a few nights but no longer.
The builder has dug up the area up to soil level... then put dpm then concrete down. It was suggest this be 4 inch but in some places its more like 2 inches. We have trees nearby and when digging up the area saw many tree roots which we tried to clear out, however some big ones I would guess are still there or will grow underneath such is nature.
I don't think the concrete had dried out yet and it has started to crack up very easy, but my question is this.
With the above laid concrete and then say 2-3 inch screed and then 40mm paving.. would it last very long for the intended use???
What worries me is that the concrete has been laid straight on soil and no hardcore of type1 underneath of any kind. The soil was however compacted but I felt this did not achieve much. Compacting soil, I never heard of anyone dong that?
I would of thought that 75mm hardcore.. then compact down, then 150mm concrete then screed and then decorative paving to finish off. Would this not be stronger and be able to withstand tree roots/ car/ movement etc Previous we had 6ich concrete with 4in hardcore, and this never gave us any problem with roots or car.
Can someone more experiences be able to please advise me?
Is there an option to lay additional concrete on top of the work carried out so far? and if so would this adhere to the newly laid concrete ? Would it be better to break up the laid concrete (easy to do whilst still drying out) instead but this time put hardcore down then concrete?
Hope someone can me out
Thank you
Regards,
Stephen