Walking/Access weight on redland 49 roof?

Hi.

I've got a leaking box gutter between my roof and conservatory that I want to have a good look at.

Unfortunately, the only access to the gutter area is either over the conservatory or over the roof, so I need to walk over the roof to take a look.

What is the safe walking weight on a typical redland 49 roof? I'm 130!g Inc clothing & shoes, + tools not sure if the roof will hold.

Any ideas greatly appreciated.

 

Its one of those thing...... the tiles wll either break or they wont?
Get a few 49s spare an go for it