tarmca drive kerb

[jackfoley]

http://www.jewsonlandscaping.co.uk/ProductView.aspx

Hi,

I'm thinkinf of using these kerbs to sort the edge of where my tarmac drive meets a flower bed.
The ground is incredibly soggy at the moment so i am worried these kerbs will sink eventually. What is the best way of securing these so that they don't sink?
I will be planting a hedge in the flower bed and for information the tarmac is layed over concrete blocks.

thanks.

 

[PrenticeBoyofDerry]

Likely to be a case of digging a small trench about 215 wide , pouring about 150mm concrete footing and laying on top or even droping a 440x215x100 concrete block in as first coarse.
Can't get the link so i'm making a general assumption.