If you're installing vertical siding on your home, you may be wondering if you need to install furring strips first. The answer is: it depends. If your siding is going to be exposed to the elements (i.e. it's not going to be covered by an awning or other structure), then furring strips are a good idea. This is because they provide a layer of protection between the siding and the house, which can help prevent moisture damage.
However, if your siding is going to be covered, furring strips may not be necessary. It really comes down to personal preference and what you feel comfortable with. Ultimately, though, it's always better to err on the side of caution when it comes to protecting your home from moisture damage.