Is wall plate under floor joists needed?

Postby slawek » Sun Sep 26, 2010 11:42 pm


I found some rotten joists under the ground floor and these need replacing (they are dry now). The wood wall plate (15mm thick, 100mm wide) was also rotten so was removed too.

Do I need to install new wall plate? I see it as potential problem for future rot even if wall plate will be treated which then transfer to joists (I will treat rising damp but damp is always a worry).

Is is good practise to install just DPC on brickwork and then support joist ends on slates which will sit on DPC? If I need wall plate - how to install it? Just to bed it in mortar and keep levl?

Rank: Labourer
Progress to next rank:
Posts: 1
Joined: Sun Sep 26, 2010 11:35 pm


Simply Build It

Postby welsh brickie » Mon Sep 27, 2010 2:05 pm

You dont have to use wall plate,but dpc and the pack up the joist with tiles or cut concrete slabs,I would suggest wrapping the ends of the joists with dpc to prevent any rot though.
welsh brickie
Rank: Project Manager
Posts: 2198
Joined: Sat Apr 12, 2008 7:54 am

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