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Composite concrete and wood shaving wall??

  • 05-08-2014 11:58am
    #1
    shane6977
    Registered Users, Registered Users 2 Posts: 165 ✭✭


    Hi all,

    I am renovating a 1940's -50's era ex-council house at the moment, the external walls are about 250mm thick and seem to be formed from an outer skin of 100mm concrete and with an inner skin of 150mm composite concrete / wood shavings.

    I can’t get any type of secure fixing into this composite mix, and I can only think of drilling a hole, filling it with some form of high strength adhesive, popping in a wall plug and screwing in the fixtures once the adhesive is set.

    Has anyone else come across this type of construction /problem and how did you resolve it (hopefully with a less time consuming method!).
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  • #2
    D_D
    Registered Users, Registered Users 2 Posts: 313 ✭✭D_D


    shane6977 wrote: »
    Hi all,

    I am renovating a 1940's -50's era ex-council house at the moment, the external walls are about 250mm thick and seem to be formed from an outer skin of 100mm concrete and with an inner skin of 150mm composite concrete / wood shavings.

    I can’t get any type of secure fixing into this composite mix, and I can only think of drilling a hole, filling it with some form of high strength adhesive, popping in a wall plug and screwing in the fixtures once the adhesive is set.

    Has anyone else come across this type of construction /problem and how did you resolve it (hopefully with a less time consuming method!).

    I'm in the exact same situation, with a 1940's - 50's ex-council house, wood shavings/cement mix to act as some sort of insulation and reinforcement concrete as the main structure.

    However, the main difference with mine is that I have about 50 - 75mm in the insulation mix and about 200mm reinforced concrete drill into. I'm renovating at the moment so I have actually removed the wood shaving/cement mix to place on a new 100mm Kingspan Kooltherm insulating board.

    If you are drilling in and applying a adhesive, you are still relying on the tensile capacity of the woodshaving/cement mix, which I would say is very small. What sort of weight are you trying to support?


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