Have started insulating the upstairs but I think some of the rafters for the roof panels are leaning quite a bit, visibly to the eye, so I took out the spirit level. What should be done?
I guess the trusses are not completely vertical but lean slightly in the direction of the ridge. It is a fairly common construction flaw that cannot be corrected without significant costs. One essentially needs to remove the entire outer roof. It's not a very serious problem if they don't lean significantly. The trusses are being loaded in a way that was never intended. A single truss that leans significantly can be fixed, but there are many nails you would need to saw off with a hacksaw blade (although it goes pretty fast with a reciprocating saw). One aspect of your discovery is that the house is likely not built by professionals, which suggests there may be more errors.
Thank you. There are 3-4 that are leaning like this (60 cm between each). The rest seem fine. There was a group of workers from Poland who assembled the house. Probably chosen more for cost than quality...
Stinginess always deceives wisdom. I have come across Poles who have been very skilled craftsmen, especially when it comes to older construction techniques, but also those who know nothing at all.
If you measure the ridge in relation to the centerline of the truss on the attic floor, how many cm does it differ then? With a 60 cm center distance between the trusses, the problem becomes smaller.
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