Things You'll Need
F-channel is used to hold the soffit onto your house. Soffit is the vinyl siding that makes a ceiling under an overhang. The F-channel is a thin vinyl strip that is sold where siding is sold. The upside down F creates a shelf for the soffit to slide into and rest on. The F channel can be easily confused with the J-channel that is used to cover the ends of the vinyl at the corners of the house and around windows. Just like the letters they are named for, the J has one shelf and the F channel has two.
Purchase F-channel in the color that matches your siding.
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Nail one strip of F channel to the building.
Nail another strip of F channel directly across from and level with the first F channel strip. It will be like the two curbs on either side of a street. These two channels will be used to slide soffit pieces into place.
Slide the soffit pieces between the two channels.
Cover the outside of the F channel, away from the building, with fascia board when you are finished. Fascia board is the trim you use on the outside of your house.