Hi, am in the process of nailing up 25 mm thick 'Kingspan Thermospitch'
sheet panels ( they are foam panels with the two outer faces covered in
aluminium foil) to the inside of my loft joists to form an internal ceiling.
I want to paint them with white emulsion paint. What primer, if any;
(preferably water based) should I use to put on the aluminium please? Or is
a primer not really necessary? thanks.
You may want to check your local building code. The International
Residential Building Code requires foam to be covered with a fire
resistive barrier such as drywall. Wouldn't want you to create a fire
Drywall (plasterboard) would indeed be easier to paint than aluminium. It
would also be more acceptable from a fire point of view.
But if you're determined to paint the aluminium then zinc chromate primer is
what you need.
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