Re-paving - dodgy or acceptable practice

We have crazy paving in our back garden. Drives me nuts since I like straight lines. The mortar's chipping away if I use a pressure washer.

One landscape designer came round and thought the base would be solid enough to just pave over with new paving slabs. Whilst this might be easy, it will block airbricks going into the living room and kitchen. It may also breach DPC.

I would have thought it'd be more sensible to dig up the old paving first.

Am I just being silly?

 

Block up the air bricks and bridge the DPC at your peril....disaster will follow.
Ideally the new paving needs to be low enough so that rain doesnt splash upwards of the DPC.
John

 

I think he means the Base should be ok. Not go over the existing. Well i hope he does.
So new paving on old base, has the base been checked?

 

Nope. Lay a ground sheet over the crazy paving, some sand, lay slabs on top.

 

So he thinks its ok to bridge air bricks and the DPC?
Is he for real?
John

 

you know what to do....