Snap a chalk line to indicate the top of the gutter.
How to tell if fascia board is level for gutters.
Gutters should have a small amount of fall toward the downspout or be level at the very least.
Thankfully there are ways to counter this damage.
Check this by holding a level against the bottom edge.
Press the board tightly against the ends of the rafters so the top edge is level with the tops of the rafters.
First consider leafguard gutters or a similar covered gutter system that will prevent clogs and splashing.
Ask a helper to assist you so you don t have to lift the fascia board yourself.
A loose gutter system can also damage your boards as it pulls away from the wood.
Also make sure your gutter piping is firmly attached to your fascia board.
If your fascia boards are level you can use them as a reference for sloping the gutters.