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Measuring Mositure Content of 75mm Sand:Cement Screed

  • 09-08-2011 2:37pm
    #1
    BMD
    Registered Users, Registered Users 2 Posts: 146 ✭✭


    Hi,

    I am looking for some advice on how to measure the moisture content of floors before laying tiles or engineered floors.

    I want to know how to measure the moisture content and what figures I should be looking for?

    Also what are typical recommended drying times for 75mm sand:cement screeds (with UFH)

    Any advice would be appreciated


Comments

  • #2
    DOCARCH
    Moderators, Home & Garden Moderators, Science, Health & Environment Moderators Posts: 18,453 Mod ✭✭✭✭DOCARCH


    All I can offer is a rule of thumb of a drying time of 1mm per day - so 75mm - allow 75 days.

    To clients, I always suggest getting the (written) advice of the tile/timber flooring supplier as to the appropriate moisture content required for the selected product.

    Any good tiler or timber floor installer/layer should have a good moisture meter for checking the moisture content. Alternatively, afaik, they can be hired.


  • #3
    BMD
    Registered Users, Registered Users 2 Posts: 146 ✭✭BMD


    Thanks, what should the moisture level in the screed be? Is it measured as % RH?


  • #4
    tred
    Registered Users, Registered Users 2 Posts: 1,473 ✭✭✭tred


    BMD wrote: »
    Thanks, what should the moisture level in the screed be? Is it measured as % RH?

    i went with 1 mill per day. And the floor screed installer offered a calcium carbide bomb test, which is basically taking a sample of the floor i believe.


    Some of the moisture readers are not that accurate with floor screed depending on the sealer etc apparently!, i rented one as well in case.


  • #5
    BMD
    Registered Users, Registered Users 2 Posts: 146 ✭✭BMD


    Does the 1mm a day change if you have the UFH on?


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