When a solar panel company came here and installed long straight mounts, I noticed that the rails "dip" a few centimeters over our carport. They themselves claim that they inspected the roof beforehand and everything is in order.
What should I do? I can access the rafters from underneath inside the carport. Nothing is damp or soft there. I plan to measure with a laser when it gets dark this evening. The carport is supported by a steel beam. The house was built in '69.
I understand I need to get a roofing company here, but I'm considering if I need to ask them to pause the installation, which continues this week.
What should one know about the issue? What have others done; I've never seen it "sag" before.
 
Image?
 
carport opening, 540cm wide. drew a support line in the second picture.

A carport opening with a tiled roof, measuring 540cm wide, under a blue sky. Carport entrance, 540 cm wide, with drawn reference line indicated above the opening along the roof's edge.
 
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peo68
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KJD KJD said:
carport opening, 540cm wide. drew a guide line in the second picture.

[image] [image]
Got help inspecting with a carpentry company via facetime(!) this morning - undersized beams in the carport section. Temporarily supported, can mount the panels and will need to reinforce the beams.
 
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namnbyte and 1 other
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How many centimeters are we talking about since you need to support?
I would be more surprised if a 50-year-old roof hasn't sagged a bit over the years.
 
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MONTREAL and 4 others
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Z z_bumbi said:
How many centimeters are we talking about that you need to support?
I would be more surprised if a 50-year-old roof hasn't sunk a bit over the years.
20-30mm, yes, I agree, but still a steel beam, though not sufficient. It became quite clear when the carpentry company looked at it that it was under-dimensioned. I could have checked Svenskt Trä to realize it myself. I've checked up towards the roof from time to time and kept it in mind. We had also already planned to close off half of the opening to have a bit more storage space, so it makes sense logically to put in another post.

It could be a homework lesson for others who order panels, that you need to review your roof, even if the solar panel company says there aren't any problems, they've of course exempted themselves. Our company focused so much on removing all the growth that we probably thought they assessed the roof as well.
 
Which company is it? My installation could have ended with a broken roof. Everything had to be redone several times before the installation was approved by an independent inspection company. After much back and forth, the solar company paid my inspection costs because they had made mistakes all along.
 
Isn't it the case that the roof has always dipped a bit, and it is not until now, when you have a straight rail to compare it with, that you see it?
 
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MONTREAL and 2 others
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Does it dip more in the winter, with snow load?

And is the ridge straight?
 
How old is the roof? It's probably not great to install solar panels on a very old roof if you need to replace the roof in the near future. It would be quite troublesome if you have solar panels there then..
 
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Joak
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S SusanneBorgfors said:
Which company is it? My installation could have ended with a broken roof. Everything had to be redone several times before the installation was approved by an independent inspection company. After much back and forth, the solar company paid my inspection costs since they had done everything wrong from the start.
Did they cut something then, or how could the roof be broken? Solar panels weigh nothing compared to a bit of wet snow.
 
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Joak
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I InsidersUnited said:
Is it not that the ceiling has always dipped a little, and only now that you have a straight track to compare with, can you see it?
exactly, that's how it was
 
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MONTREAL
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H Hybro said:
Does it perhaps dip more in the winter, with snow load?

And is the ridge straight?
The ridge is straight. However, there's rarely snow. It could certainly be more with load.
 
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MONTREAL
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What type and what dimension of the steel beam?
 
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