Working safely on newish corrugated cement fibre roof

Hi,
Can anyone advise how to work safely on this garage roof?
I need to take out the screws the installer stupidly put in the troughs (which now leak like seive holes), seal the holes and fix screws on the peaks.
The sheets are only about 4 years old and not asbestos, but I'm going crazy researching different options I can use to lay over the top giving enough reach, enough weight distribution and not costing an arm and a leg (nor the cost of my arms and legs after going through the roof!).
I think I'm supposed to cover three purlins, but that would cover the overlapped join and would that not put stress on the bottom edge of the top sheets? Am I better off working with separate lengths for the top and bottom half of the roof to avoid this (but covering just two purlins)?
I've been looking at hiring alloy staging boards as one option?
I'm stuck with remedial repairs (like my flashing tape solution to a water runback nightmare) until I can agree full replacement with my neighbour.
Thanks for taking the time to look.

Guyzor said:

Hi,
Can anyone advise how to work safely on this garage roof?
I need to take out the screws the installer stupidly put in the troughs (which now leak like seive holes), seal the holes and fix screws on the peaks.
The sheets are only about 4 years old and not asbestos, but I'm going crazy researching different options I can use to lay over the top giving enough reach, enough weight distribution and not costing an arm and a leg (nor the cost of my arms and legs after going through the roof!).
I think I'm supposed to cover three purlins, but that would cover the overlapped join and would that not put stress on the bottom edge of the top sheets? Am I better off working with separate lengths for the top and bottom half of the roof to avoid this (but covering just two purlins)?
I've been looking at hiring alloy staging boards as one option?
I'm stuck with remedial repairs (like my flashing tape solution to a water runback nightmare) until I can agree full replacement with my neighbour.
Thanks for taking the time to look.

View attachment 401100

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I'm sorry but that's hilarious, if it's not AI generated.

Take the sheets off and flip 'em over. Start on one corner and work from the inside reaching for the fixings.

noseall said:

I'm sorry but that's hilarious, if it's not AI generated.

Take the sheets off and flip 'em over. Start on one corner and work from the inside reaching for the fixings.

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Thanks. Sadly not AI.
Flipping the sheets would put the rough side up and smooth underneath though? Also, if working from the inside would not all sheets on my side need to come off to get access to the bottom right one (above the ladder)?
Given I want to keep the smooth side up and don't have the time to take all the sheets off (if I did, I'd be doing the proper replacement as there are other issues, rather than a temporary DIY bodge), is there a way to work safely on the roof?

I have made my own crawling boards out of 12 foot lengths 9x1" rough saw timber, lined on one side with carpet underlay or camping mat foam stapled on.

catlad said:

I have made my own crawling boards out of 12 foot lengths 9x1" rough saw timber, lined on one side with carpet underlay or camping mat foam stapled on.

Click to expand...

Thanks!