Find out exactly where they're hiding
Termites mostly stay hidden amongst the wood panels and support beams of homes, which means some searching will be involved. Some of the tell-tale signs can be seen from the surface, like mud tunnels, feces, and random sawdust; other signs, especially if they're from ground-dwelling subterranean termites, may stay invisible for almost five years before being noticed.
In any case, there are some places termites are commonly found in. These include crawl spaces, firewood piles, doors, window frames, cable and wiring openings, attics, and basements. Essentially, anywhere that has wood is fair game for termites.
Use termite bait or liquid insecticides
Once you've pinned exactly where the termites are, it's time to exterminate. Termite bait and liquid insecticides are the most commonly used forms of do-it-yourself termite control.
Termite baits are set up as lures to attract termites with wood material containing boric acid. Upon ingestion, the bait is released upon their return to the colony. This is typically installed in the soil near suspected termite hideouts and monitored periodically to check if termites have taken the bait. If so, you can expect the termite population to decrease within a short amount of time.
Liquid insecticides aimed at termites are much simpler to use. Just purchase the product - Termidor SC, Premise 75 Termiticide, to name a few - and spray on areas you've uncovered with termites. Use a vacuum to clean out the aftermath.
By far the best and most effective termite control technique you can do yourself is to prevent attracting termites to your home. Once termites find a source of wood or material near your home, it's only a matter of time before they move on to the house itself.
To prevent them breaching your home's structure, seal any and every crack with sealant or caulk. Focus on doors and window frames, which are usually the most susceptible to cracks. Keep your yard clear of wood and other debris. Most of all, keep it dry inside and out of your home. Fix leaky garden hoses and make sure your drains are working properly.
When it's Time to Call a Professional
In the majority of situations, homeowners are unaware of a termite infestation and won't do anything about it until structural damages have become apparent. At this point, do-it-yourself termite control methods may not be enough to fully eradicate the problem.
Should this be your case, call a professional exterminator immediately. While you wait for them to arrive, try the above steps to help slow the spread of infestation. Termites are challenging pests, so let someone with experience handle your home's victory over them.