DIY Doctor

Sealing the bottom of a roughcast wall

Postby Alvin Wyllie » Thu Apr 24, 2008 9:06 am

This should be easy for someone. The exterior of my house is roughcast extending down to concrete paths on the northfacing wall. It's wet there a lot of the time. The roughcast sounds hollow in places when knocked, so I know it's loose. When I redo the roughcast, should I leave a couple of inches or so clear of the concrete path or can the join be successfully sealed? I don't know where the damp course is yet but I don't appear to have a problem with that. The house was built around 1922. Many thanks for any advice.
Alvin Wyllie
Rank: Tradesman
Progress to next rank:
Posts: 27
Joined: Thu Jan 31, 2008 9:39 am


Simply Build It

Postby STILLUCAN » Thu Apr 24, 2008 2:54 pm

Yes leave a gap. Water resistent products may be available but nothing beats an air gap to prevent possible rising damp bridging existing DPC which in your case is probably slate positioned in wall just below base of floor joists. It's fairly likely that capillary action from concrete to roughcast has caused your problem in the first place.
Rank: Labourer
Progress to next rank:
Posts: 4
Joined: Mon Apr 21, 2008 6:43 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