Bonding new mortar to old mortar on patio

Discussion in 'Building' started by woodman-46, 19 Jul 2018.

  1. woodman-46

    woodman-46

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    I am renovating out patio and have hacked out the loose and weaker mortar. What is left is strong and stable and clean edged. Before I apply new mortar into the holes do I need to apply a bonding agent to the edge of the remaining mortar so that the new mortar and old adhere well. I had thought of PVA but being outside assumed this might not be suitable ?
    Any advice very welcome.
    Thanks
     
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  3. ^woody^

    ^woody^

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    No just wet it.
     
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