Height of dpc to block paving - Some help on dpc to block paving height

[Drjag]

Hi there,

This is my first post so any help you can offer is very much appreciated.

We have a small 2 bed bungalow and to alleviate dampness in the back bedroom (caused by DPC/air vent being breached with a high level of tarmac at the side of the house) we are having the front drive and side re-surfaced (with tarmac) with an edging of block paving plus linear drains.

My question is, as follows:
Although it is not best practice (from reading forums) is it still acceptable or most definitely a big NO our following situation:

Please see pictures attached - The Contractor carrying out the work has removed some of the old tarmac and laid a course of blocks hard up against the property only 5-10mm below the DPC onto a concrete base. He says this is fine because linear drains will be fitted in front of the blocks to run rainwater into a surface drain. If he was to place them any lower (say, at 150mm below DPC) this would not connect to the existing surface drain.

Your thoughts and suggestions very much appreciated.

Pictures - to follow, if requested..i'm not sure how to upload to url? i can send them as .jpg

Thanks, Drjag

[seanandruby]

No it's not acceptable.
read this

[Drjag]

Pictures -

Pictures

[Drjag]

Hi Sean,

Thank you for your prompt reply. I had read the link (you have just sent) earlier in the day and that is where my worries all started, hence my post to you Experts.

The solution, therefore is to (i) STOP any further work and (ii) ensure the linear drains are placed at least 75mm below the DPC adjacent to the house wall.

Kind regards, jkj

[seanandruby]

Yes and plumbed into a drain pipe.

[Drjag]

[Drjag]

All sorted thanks for all your help Sean, see pics

AFTER_Pics

[Drjag]

All sorted, thanks for all your help Sean.

AFTER_Pics

[jwill]

Its the same picture as far as I can see.
Those acos could be lower and still connect to your drain I reckon it's just at that level because it's a cheat going into that gully like that

[Drjag]

Hi jwill,
Thanks for your reply.
Yes you are right.. My mistake, the correct picture of what the Contractor initially rigged up was as follows:

[Drjag]

Initial setup by Contractor

I was not happy with this as the blocks were far too high/close to the DPC.

So thanks to the response of The BC i managed to convince the Contractor to lower the blocks and install drains adjacent to the house wall..

I appreciate all your help, thanks. j