The most recent knowledge I have about vertigris is that it attacks the parafin used in wool action centers. I think the same chemical reaction is occuring on the cedar siding and pressure treated lumber on my deck. The room was built eight years ago, and for the first five years I was religious in anually maintaining it; i.e. cleaning and applying a protective coating. The house and deck rarely see sunlight as there are big trees that create heavy shade. I started out using Olympic clear stuff wood preservative that was supposed to prevent mildew then I swithced to Thompson's stuff. This produced a bead when it rained, so I thought I did good! It has been 2 1/2 years since I did this maintenance, and now the deck is the color of most people's lawns, and wherever I used the "beading" stuff on the siding, there is a case of the most pernicious mildew I have ever seen. The reason for this post is that during power washing and applying chemicals (something like X-14 mildew remover) I realized the black mold had grown the worst in the areas I had treated. They tell me that wood treatments that "bead" usually use parafin, and that I should try something with Linseed oil. Anybody have any suggestions? :) Carol Beigel Allergy City
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