Start by fitting the outlet (running outlet
in the middle of a gutter run, stop end outlet at the end
of a run) directly over the drain position - use a plumb
line to check this (3).
Using 25mm x 5mm (1in x No. 10) screws, fix
the outlet to the fascia, allowing for the fact that the
far end of the gutter must be higher than the outlet by
10mm for every 6m of gutter (a fall of 1:600).
Now fit the end fascia bracket furthest away
from the outlet, allowing for the required 1:600 fall. Check
that the fascia board itself is level (it should be) and
then use this as a reference line to position the bracket.
Repeat with the other end fascia bracket if the outlet is
in the middle of the gutter.
Tie a string line tightly from the end fascia
bracket(s) to the outlet and use this as a guide for installing
the remaining fascia brackets, which should be placed no
more than 1m apart, working outwards from the outlet. Screw
each bracket to the fascia with two or three gutter screws
(4).