I recently installed vinyl gutters around the roof of my house, but after the first rain I discovered that the gutter doesn't seem to be catching a lot of the water. Much of the water seems to be dribbling between the gutter and the fascia board. What is a good way to make the water go into the gutter?
Sounds like either the gutters aren't secured tight enough, or you don't have a drip-edge flashing between the roof and gutter. The drip edge deflects water out and away from the house trim and into the gutter. You install it under the shingles, pulled out slightly from the trim, and secured with roofing cement.