Depth of bedding sand - Low spots in subbase

[witho84]

Hi,

I am currently laying block paving on my driveway. I have laid the sub-base and compacted it but in certain areas the level is lower than the advised 100mm thus causing the bedding sand to be deeper in these areas (upto 80mm in some areas). Will this matter?

Thanks very much in advance of any help you can offer.

Cheers
Rob

[rimexboy]

yes it will you need more sub base compacted down

have a look here just for you

[rab1]

Yes, fill the low spots with more type 1 and compact if these area's continue to sink use terram under the base.

[lutonlagerlout]

I aim for 35mm bedding sand under CBP
80 mm is wildly too much and it will cause differential sinking
^^ add more type 1 and recompact
LLL