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If you are concerned about protecting your house from termites, you can hire a professional, who has to abide with legally enforced guidelines to protect your home (and in most states the work is accompanied by a guarantee of from 1-5 years which can be renewed at a moderate price). Or you can go online, get some borates, and do the job yourself. Heck, on ebay you can even buy products like Premise that are supposedly for licensed pest control operators only. I would recommend you get Truman's Scientific Guide to Pest Management Operations for detailed instructions on how to do the job. Eco-exempt is one product you can legally buy that is organic in nature and is labeled to kill termites, though the label says nothing about prevention.
If you want to make sure your home is termite-free, follow these common sense tips:
1. DO NOT have any wood chips, firewood, railroad ties, etc, touching the ground and also touching your home. Wood to ground contact is what attracts termites. Keep leaves and other junk from around your foundation, as these attract bugs of all kinds and also hold moisture. Get rid of dead wood in your yard, like old trees and bushes. Make sure your crawl space is at least 12" high and you don't have wood stored there.
2. MAKE SURE you have no water leaks. This is an attractant not only for termites but for other insects as well.
3. Termites will come up through expansion joints and around plumbing (drains, etc) that has been set in concrete if there was no pre-treatment of the soil before the house was constructed.
4. The way to know if your house has termites is to check for any "dirt" like substances around the corners of windows. In a crawl space, look for mud tubes going up from the ground to the floor joists. If they are dry, they are dead tubes; active tubes are "muddy". Termite damage looks similar to dry rot and moisture damage on wood. If you see what looks like a lot of little nail holes up and down a board, this is more likely to be powder post beetles, another wood destroying insect. Also carpenter ants like to chew wood (that has started to decay) in order to make galleries to house their colony. Premise Foam works great at destroying these, btw.
5. Spring and fall are termite swarm seasons. Swarming termites (alates) look a lot like flying ants, which swarm at the same time. The difference that is easiest to spot is the body-flying ants have a pinched in body; termites have a fat body. Don't worry about your house unless you see the swarm coming out of cracks in the floor or walls. Swarms in woods are probably going to stay there.
My company uses Premise products, and their website is www.nobugs.com You can go there to read more about termites.
BTW, our termite treatments range from $400-2000, depending on the size of the house and the amount of work we have to do. Renewal fees are $95 each year.
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