Drop down one row, move over to the next bay, install another wedge, drop down one more row, move to the next bay, and install your third wedge. After three wedges have been installed in this method, drop down one more row but return to the first bay and repeat the pattern. The pattern will hold true throughout the remaining bays. If you examine the side of a house after installation, you'll see that every fourth row has a wedge. Once the wedges are installed, they become a permanent part of the siding.
Some homes require less wedges than others, depending on the moisture problem.
Our company wedges every home we paint or stain, because eventually after a number of coats of paint or solid-color stain, the surfaces become less susceptible to natural breathing. The only true stains that will not peel are semi-transparents, but most of these have a very short life under most weather conditions and have to be recoated every three or four years. Our wedge system has proven to be an effective solution for 38 years. Strip all damaged areas to bare wood. Insert the wedge as described.