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Concrete Flag Retaining Wall

Discussion in 'In the Garden' started by Damian30, 18 Apr 2007.

  1. Damian30

    Damian30

    Joined:
    19 Jan 2006
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    Location:
    West Midlands
    Country:
    United Kingdom
    Hi,

    I am planning on using some concrete paving flags (750mm height) from our existing patio which I will be replacing to form a small retaining wall. Its maximum height above existing ground level will be max 300mm, although it will quickly reduce over its 4 metre total length.

    I was going to build it exactly as on the Paving Expert site but when it is up, do I need to put any DPM and filter materials next to it before I backfill? There is a land drain not too far away from the location of the wall so any water pressure should be reduced.

    Also, when I've been excavating for the flags, I've noticed that there has been minimal postcrete used around the wooden fence posts. So while I've got access to the base of the posts I was thinking about throwing some extra C20 into give a bit more stability to the posts. Will any new concrete bond to the existing postcrete or do I PVA the existing to help bond the new concrete to the existing postcrete?

    Any advice on any aspect of this 'project' would be very much appreciated.

    Many thanks in advance for any information that can be provided.

    Damian
     
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