"Osprey" wrote:

Fitting a number of new fascias to a new project.
Paid extra to get 1" finished thickness softwood & moulding I
wanted.

For joints mid run, intend using 45 degree scarf joints (lined up
over
rafter end) .... should these be glued or left dry ?

Finish will be dark wood stain.

45 on 1" material isn't much of a scarf compared to a normal 8:1 or
10:1, I typically see.

Have you thought about adding biscuits to strengthen joint and hold
pieces in position?

I'd definitely use glue.

YMMV

Lew