Yep, it's relatively flimsy but for something that gets used once a month it's fine. If I was going up every few days I'd have looked at something more sturdy.
The clearance issue I had wasn't that there wasn't enough horizontal space for a ladder to sit up there, it was that there wasn't enough roof clearance. The bigger ladders push up and swing around so you need an arc of vertical clearance available. My problem was that in one direction it would have fouled on the roof and the other a roof truss. Worth checking that you have that clearance.
For the hatch I just used a piece of ply, trimmed to size.
Yep, it's relatively flimsy but for something that gets used once a month it's fine. If I was going up every few days I'd have looked at something more sturdy.
The clearance issue I had wasn't that there wasn't enough horizontal space for a ladder to sit up there, it was that there wasn't enough roof clearance. The bigger ladders push up and swing around so you need an arc of vertical clearance available. My problem was that in one direction it would have fouled on the roof and the other a roof truss. Worth checking that you have that clearance.
For the hatch I just used a piece of ply, trimmed to size.