[weatheredwood]

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.

 

[de-nagorg]

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

 

[jlhaslip]

Under my code, if it touches concrete or masonry, it needs to be PT.

 

[de-nagorg]

Under my code, if it touches concrete or masonry, it needs to be PT.

Codes change, it used to be underground with a possibility of water seeping in through the wall.

Also codes in different areas differ , so their best bet is to consult their building inspectors office.


ED

 

[KarenStein]

I would not use wood furring at all- I would use metal 'hat channel,' available at any drywall supply house.

Here's a picture of it:

https://images.search.yahoo.com/sea.../10/7eigth-furring-hat-track.jpg&action=click


Hat channel is available in various depths. Typically the center portion is attached to the wall, and your walls are attached to the flanges with fine-thread drywall screws.

 

[Gary in WA]

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