Fixing Plywood Subfloor Above Insulated Floor Cavity

Discussion in 'Eco Talk' started by DanBl, Jun 29, 2021.

  1. DanBl

    DanBl New Member


    Do I need to prime the underside of the subfloor before putting it down? and if so what do I prime it with?

    Between the floor joists I've put down two VCL membranes with wool insulation in between. The subfloor (22mm T&G plywood) will sit directly on top of the membrane screwed into the top of the floor joists and glued in the T&Gs.

    As I've added in membranes to control moisture and insulation to control temperature under the floor, will a primer/sealant be needed on the subfloor?

    Thanks in advance,

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