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Roger's Home Journal
Roger's Home JournalWhen There's Fungus Among Us
By Roger Faris
May 03, 2001 -- The wet climate in the Northwest contributes to a flourishing of wood rot organisms that gradually turn parts of our homes into compost. The question of how this problem became known as "dry rot" is a minor mystery. The nasty fungus, Serpula ladcrymans, needs moisture and a food source to survive. Our leaky sky provides plenty of water, and wood fiber is a gourmet meal for this primitive life form.It's nearly impossible to keep certain parts of the house from getting wet. Porches, decks, windowsills, fascia boards, and other outdoor features are quite vulnerable to decay. Keeping paint on these surfaces is somewhat helpful, but water has a way of finding a way past that thin layer of protection. Then the paint is part of the problem, as moisture becomes trapped in the wood.
I've admired the ingenuity of my fellow homeowners in their battles against this natural decomposition. There are many approaches that can be effective. I've noticed that people who have little concern about aesthetics will sometimes protect a wood component by securing metal flashing to divert the rainwater. More than one person has realized that old license plates nailed to the windowsill will do the job. Of course, this sends a pretty strong message about their priorities and attitudes. The handy-person who subscribes to this method does not tend to subscribe to House Beautiful Magazine, or care much about what the neighbors think.
Another way to discourage fungus is to treat the wood with a potent chemical concoction. Wood preservative products can be effective against rot organisms, but some of them are also pretty nasty to work with. It's a good idea to read the labels and directions before buying any toxic products. Be very careful to avoid skin contact or hazardous fumes.
There is one type of chemical counter-attack that is quite safe. It's basically a borate mineral substance that's about as dangerous to humans and pets as common salt. This is available in several forms, and is great for discouraging wood-destroying insects as well as fungus. A local supplier (in Kirkland, WA) has compiled a great treasure of information about how to use borate and related products. It's well worth a visit to their store (751 Kirkland Ave. (425) 827-6000) or website www.woodcaresystems.com.
Another reason for learning more about borate products is the all-too-common problem of mold in attics, crawlspaces, bathroom walls, and closets. The spores from mold and mildew can be a serious threat to respiratory health. Fortunately, a solution of borate and water can be sprayed onto these surfaces to kill mold and prevent re-occurrences.
But why are molds and mildew growing in our homes? The answer will require an exploration of how our homes are built, sources of humidity, air movement, ventilation, and a several other factors. This topic can have a major impact on our comfort, health, and economic wellbeing. It deserves its own article...
Roger Faris is the director of the Phinney Neighborhood Association Well Home Program and Project Impact Earthquake Retrofit Program. He can be reached at (206) 789-4993.
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