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Do they need to be pressure treated? This is not a basement. It is a hollow concrete block wall. I closed off a window and need to add drywall. I can't tell if the furring strips are pressure treated or not.
 

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JUSTA MEMBER
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Is the block wall all above ground?

If so; do not need PT furring.

Does your furring have a green tinge to it, have you cut into one, if cut you should see a thin line around the outside with the treatment, if it is PT.


ED
 

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The CMU will let moisture through to possibly mold the paper on paper faced drywall. Sounds as if you are limited to furring strips rather than set-height hat channels for your wall patch. Paint the strips all edges/sides/ends to limit water capillarity. If doing the whole wall I would suggest foamboard first, then drywall, as you are in FL; http://buildingscience.com/documents/insights/bsi-037-mold-in-alligator-alley

Gary
 
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