What fixing for slate wall?

Discussion in 'Builders' Talk' started by arsenalboy, Mar 3, 2014.

  1. arsenalboy

    arsenalboy Member

    My Victorian garden wall is 7 feet high and 20 inches deep. Five years ago I put some trellis up which protrudes 2 feet above the wall and 4 feet down the wall.
    The wall is predominantly random slate with a few stones here and their. The trellis was fixed onto heavy duty battens which were screwed to the wall with 2 inch plastic plugs.
    The recent storms was not kind to the trellis! Whilst nothing is broken the whole lot came away from the wall and was suspended in mid air by a network of plant climbers. I have managed to push everything back into the 20 holes or so and it is all held in place with a series of wooden props.

    Can anyone give me any guidance onto some more robust fixings that I can use. I cannot take the trellis down and need to work around it.
    Originally I had a terrible job drilling into the slate wall which would either take ages or splinter. I recently read that it is best to drill into a slate wall with a hand drill. I have tried this and it works really well.

    Are there any such fixings that will fit into a drilled hole and then "grip" into the slate when its screwed into?
    I see plenty of fixings that will do this for concrete but what about slate?

    Many thanks.
     
  2. Sean_ork

    Sean_ork Screwfix Select

    self tapping concrete screws
     
  3. arsenalboy

    arsenalboy Member

    I had looked at those but was told that slate being a "soft" material could mean that the thread it creates could disintegrate under pressure. Hence the request for something that will exert sideways pressure under load.
    Is my advice incorrect?
     
  4. Sean_ork

    Sean_ork Screwfix Select

    expansion anchors, frame fixings, concrete self tappers - they all exert an outward force from within - the size of the slate will dictate how/if the fixing splits the material - you could look at resin fixings .........

    but if the wall isn't sound you'll have to find some anti-gravity fixings to keep even the lightest item in position for any length of time
     
  5. Phil the Paver

    Phil the Paver Screwfix Select

    I think the problem is down to the depth of the fixings, because the slate is softish, a 2" into the slate fixing isn't enough, I would be looking at a frame fixing that allows 4" of the fixing to go into the slate, this will give it half a chance of biting onto something.

    Something like this.


    http://www.toolstation.com/m/part.html?p=20586
     
  6. BuilderMCR

    BuilderMCR Active Member

    What about resin anchors/fixings?
     

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