Wood-destroying insects and other organisms can cause serious problems in the wooden structural components of a house, and may go undetected for a long period of time.
Termites
 
Subterranean termites are the most damaging insects of wood. Their presence is hard to notice, and damage usually is found before the termites areseen. Prevent infestations because if they occur, they will almost always need professional pest-control service.
Signs of Infestation
 
Hire a qualified InterNACHI inspector to inspect for termites or other wood-destroying organisms. Generally, the first sign of infestation is the presence of swarming termites on the window or near indoor light. If they are found inside the house, it almost always means that they have infested. Other signs that may be found are termite wings on window sills or in cobwebs, and shelter tubes, which are tunnels constructed by the termites from soil or wood and debris. Usually, wood damage is not found at first, but when it is found, it definitely reveals a termite infestation. 
 
Control
 
Control measures include reducing the potential infestation, preventing termite entry, and applying chemicals for remedial treatment.
 
Inspector Observations
 
Inspectors will observe visible, accessible areas of the house and other structures/areas within the legal boundaries of the property that have potential for infestation by termites and other wood-destroying organisms, including the bottoms of exterior doors and frames, wood siding in contact with the ground, and crawlspaces. Mud tunnels running from the ground up the side of the house may indicate termite infestation. Observe the eaves and gable vents and wood window sills for indication of the entrance of swarming termites, and note excessive dampness or large areas where the vegetation is dead. Evidence of active termite infestation must be noted.
 
The inspector will determine if there is visible infestation, damage, and/or conditions that could invite a termite attack, or the need for remedial control measures. Always hire an InterNACHI inspector for your inspection needs, as they are trained by the highest standards in the inspection industry.
 
Outdoors
 
Check the accessible foundation of the house, garage and other buildings for shelter tubes coming from the soil. Look closely around porches, connecting patios, sidewalks, areas near kitchens and bathrooms, and hard-to-see places. Check window and door frames, and where utility services enter the house for termite infestation or wood decay. Also, look behind shrubbery and plants near walls. Pay special attention to areas where earth and wood meet, such as fences, stair carriages and trellises. Open and check any exterior electrical meter or fuse box set into the wall, a common point of infestation.
 
Indoors
 
Carefully check all accessible doors, window facings, baseboards, and hardwood flooring. Discoloration or stains on walls or ceilings may mean that water is leaking and can decay wood, and this can aid termite infestation. It is very important to inspect where plumbing and utility pipes enter the foundation and flooring. Also, examine the attic for shelter tubes, water leakage, and wood damage.
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 Prevention Many termite problems can be prevented. The most important thing to do is to deny termites access to food (wood), moisture and shelter. Follow these suggestions:

  • have at least a 2-inch clearance between the house and planter boxes, or soil-filled porches;
  • eliminate all wood-to-soil contact, such as trellises, fence posts, stair casings and door facings (they can be put on masonry blocks or on treated wood);
  • separate shrubbery from the house to help make it easier to inspect the foundation line;
  • use wolmanized wood (pressure-treated wood) so that rain will not rot it;
  • seal openings through the foundation;
  • remove wood scraps and stumps from around the foundation;
  • have at least 12 to 18 inches of clearance between floor beams and the soil underneath.