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    tried that's Avatar
    tried that Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Mar 20, 2010, 12:56 PM
    New shower drain beneath concrete floor
    Must I use gravel around a new 2" shower drain before filling trench w/ concrete or is the clay soil I removed from the trench adequate, providing I pack well? There will be a minimum of 4" of concrete over the 2" PVC drain line. Is it necessary to replace plastic membrane before concrete is added? It's a fairly dry location and will be covered w/ ceramic tile. Thanks...
    Milo Dolezal's Avatar
    Milo Dolezal Posts: 7,192, Reputation: 523
    Plumbing Expert
    		  
    #2

    Mar 21, 2010, 01:25 AM

    Installing plastic membrane in such a confined area will not do too much since you won't be able to water seal it with the existing vapor barrier. Just fill it with concrete and you should be fine.
    CHayn's Avatar
    CHayn Posts: 177, Reputation: 10
    Junior Member
    		  
    #3

    Mar 21, 2010, 04:26 PM

    Do you have a radon relief system in your house? They usually have plastic membrane under the slab if you do. Not that I would worry about it.
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