Here are some reasons:

1) Living near saltwater- Wind picks up saltwater in the air and gets on the house

2) If plants or hanging trees are close to the house- Over time they can grow into the siding- We see a lot of rotted wood in these situations

3 ) If heavily treed area – More mold and Mildew. Are more prone to rot since the siding doesn’t dry out

It all l depends on Exposure and the Elements

Also, many Washington homes framing of the house contains “tails”. For the fascia of the house, these are the corner edge pieces that hang past the gutters and are exposed. They can tend to rot out. At the first signs of rot, getting a painting contractor out to inspect the home is a must! If caught early, these can be repaired as part of the paint job. If you wait too long, then carpentry needs to be replaced which is more costly.

Of course, many homeowners don’t have these conditions, and just want to change the color for a whole new look!