When placing entrance holes in wooden frames be sure that the hole will not interfere with opening or
closing the windows. See Figure 47.
Figure 47. Entrance holes through wooden window frame.
Whenever possible, slant the entrance hole upward from the outside. When drilling an entrance hole
through a brick wall, make the hole in a seam between bricks. Start drilling the hole on the side of the
wall on which a neat appearance is desirable. See Figure 48.
Figure 48. Hole slanted upward.