DIY Doctor

Main navigation

Block paver driveway breaching DPC and causing damp issues

Postby Petebrown2006 » Sun Sep 19, 2021 6:52 am

Hi All,

I have a damp issue due to a block paved driveway breaching the DPC / it was built up and covering air bricks. I have lifted the first 2 rows of brick, to find the base is concrete. Suggestions are that I break the concrete out, excavate and then back fill with 40-50mm stones. The DPC is just above the air bricks shown in the picture

However, to avoid breaking out the concrete do you think the I could drill drainage holes in to the slab instead?

If I do need to break out the concrete, would you suggest a jack hammer?
Rank: Labourer
Progress to next rank:
Posts: 2
Joined: Sun Nov 01, 2020 8:39 am


Simply Build It

Postby stoneyboy » Sun Sep 19, 2021 9:52 pm

Hi petebrown2006
You really need 150mm of exposed brickwork under the DPC. If you cannot achieve this you will have to cut out the concrete base.
Regards S
Rank: Project Manager
Posts: 6317
Joined: Wed Dec 10, 2008 6:44 pm

Display posts from previous
Sort by
Order by

  • DIY How to Project Guides
  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!

  • Related Topics