The soffit pieces should measure 1 4 inch shorter than the actual length of the soffit.
Step to siding.
Alternatively use j channel nails for vinyl.
Vinyl siding usually comes in 12 foot 3 66 meter lengths.
Extra things to remember when installing step flashing.
Next nail strips of 1 2 in.
1 2 inch 1 3 cm plywood or osb are common substrates and these are generally covered with roofing felt or another moisture barrier prior to siding the walls.
Measure and cut the soffit pieces.
Remove any siding or exterior finish that isn t compatible with vinyl siding and make sure the walls are sheathed with a substrate to receive the siding.
Nail the metal siding onto flashing by following siding manufacturer directions for material installation.
Make sure that you leave a quarter of an inch gap between cement board or wood siding and step flashing.
Step by step installation instructions here you ll learn how to remove the existing siding apply the moisture barrier and window flashing install a j channel and lastly secure the siding.
Therefore you will need to cut these long pieces of siding to fit the measurements of your soffit.