This one has to be tough - in Inverness and it's right on the coast and might be coping with snow loads on the roof for 3 months of the year.
I partly built the roof structure back at the workshop before doing all the detailed work.
Once on site I added horizontal support members to each rafter which are jointed in to the structure to prevent any potential sag in the rafter or ridge caused by over-loading.
I also added long lead cover flashings over the roof windows to prevent wind-blown water ingress around the hinge joint.
Click on each