To install a fascia board, the first thing is to measure and cut your boards to length. Traditionally, you’ll use a 45-degree angle on your cuts to lap one to another. This prevents water from seeping into the joints and creates a more finished look when caulking and painting the finished product. If your mounting rafter tails, measure for the seams so that they will land on the center of your craft or tails. This isn’t necessary if there has already been a sub fascia installed on the center of the rafter tails. Use a string from one end to the other, set to the correct height at the bottom, left and right of your fascia section that you’re installing. This string allows for the correct height linearly along the eave. If there is a rafter tail that is long, cut it to a more standard length and then continue on.
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