PAINTING TIPS – WATER OR OIL BASED ?
With a variety of different types of Treated Pine available, it is necessary to be a little careful about your choice of paints.
The First step to painting your Treated Pine is to ensure that your correctly identify it. See our page on Identifying Treated Pine.
CCA (Seasoned-Kiln Dried to Aust Standards) CCA treated timbers can be primed and over-coated with Acrylic/Water based paints. It is recommended that Kiln Dried CCA treated timbers be allowed to age for 7 fine days prior to painting. Although it is recommended that a primer be used, your local paint retailer may recommend a quality paint that does not require it. Painting of CCA Treated Timber is not necessary to maintain its warranty.
CCA (Wet, Unseasoned) CCA treated timbers can be primed and over-coated with Acrylic/Water based paints. It may be necessary that wet (unseasoned) CCA treated timbers be allowed to Air dry for 28 fine days prior to painting. Due to the unstable nature of Wet, Unseasoned Treated Pine, there will likely be some movement in the timber during this air drying period. Although it is recommended that a primer be used, your local paint retailer may recommend a quality paint that does not require it. Painting of CCA Treated Timber is not necessary to maintain its warranty.
LOSP Treated Timbers are solvent based and thus must firstly be Primed with an Alkyd Oil based paint prior to an additional two top coats. In some cases LOSP treated timbers will have already been pre-primed. Depending on the compatibility between your chosen Alkyd Oil Based Primer and the subsequent two top coats you may be able to use an Acrylic (water based) paint. In all cases the warranty on LOSP Treated Timbers states that the timber must be painted with a primer and two additional top coats
Here is a download for Guidelines regarding the painting of LOSP Treated Pine.
Please refer to our section on Identifying Treated Pine so that you can correctly advise your paint supplier the type of treated timber you are painting.