Guttering is generally sold in 2m or 4m lengths and is easily cut to size with a hacksaw but be sure to de burr any cut surfaces with a file or sandpaper.
Fitting internal gutter brackets.
J place your brackets along the stringline at maximum 1200mm centres and secure with bugle phillips head screws.
Having fitted the gutter brackets it is time to fit the guttering.
Join the next length of gutter to the first with a union bracket.
Clip the two ends in and fix to the facia with a suitable screw.
If you live in an area that is prone to regular heavy snowfalls position fascia brackets so they are no more than 400mm apart.