Mark the drill height of 4 inches above the dirt along your foundation using the measuring tape and chalk.
Mark drill marks every 12 inches along the drill height using the measuring tape and chalk.
Drill holes into the drill marks using the hammer drill fitted with a 1/2-inch drill bit at a space of every 12 inches. The drill bit must have a length of at least 18 inches because you need to penetrate the foundation and attack the dry-wood termites that burrow up from the soil. Drill each hole at approximately 45-degree angle into the foundation.
Mark a hole along the main posts for main wooden posts or beams of the patio or porches 4 inches up from your foundation using the measuring tape and chalk.
Drill holes 1-inch deep approximately every 12 inches using a power drill fitted with a 3/8-inch drill bit. Angle the drill bit at approximately 45-degrees.