My stain is supposed to have a mildewcide in it, so why is there mold/mildew on my logs ?
No stain known to man (or woman) will prevent mildew or mold growth, regardless whether they have a mildewcide mixed in or not. Dry wood is what prevents mildew. Certainly, an additional dose of mildewcide which can be added to the stain will make it that much more difficult for mildew to thrive. But it’s no guarantee it won’t ever appear. There are 4 mandated conditions needed to allow for the growth of mildew. They are: the presence of food, moisture, oxygen and temperature. If any of these 4 conditions are eliminated, so will the conditions needed for mildew to grow. The wood is the food source. We have no control over the temperature and we need oxygen.
