Edgeing course - Confused

[ColinP]

Hi All, i am soon to undertake my largest DIY project to date on the new home. Its a 40sq metre approx block pave driveway.

Anyway, after going through the seperate processes involved on the site i have confused myself.

On the concrete bedding edgeing page of the site and the step by step page it shows laying the concrete bedding and haunching directly onto the sub grade layer.
On the edge course page the diagram shows the edgeing bedding on the sub base layer.

Im confused which i should use. I plan to dig the whole lot out and then compact well with a whacker, would this take the edgeing? Any comments are welcome

thanks

[seanandruby]

any method will do to lay on as long as you have a good concrete bed under and haunched the edgings.

[derekoak]

I found that difficult. I think the point is that you need at least 100mm depth of concrete under your edging unless something else like a boundary wall is retaining the paviors, then bedding of 50mm will be OK.

[Tony McC]

Both options are viable, and, as you say, the important thing is the bedding depth and haunching width.

The dichotomy comes about because of the way different contractors work. Some lay the edge courses on the prepared sub-grade then infill with sub-base material, while others spread, level and compact the sub-base then excavate a shallow channel to accommodate the bed concrete for the edge courses.

The cowboys simply lay edge blocks onto the sand laying course and then tuck in a bit or mortar or soil as comedy haunching.

[ColinP]

Thanks all, thats put my mind at ease.

great site and great tips,

shall be sending my pics over to you when its all done..

cheers