Are the ripples apparent before the panels are installed or do they just appear once the panels are on the roof and fastened?
If they are apparent before the panels are installed, then you need to investigate stresses in the metal (could be from many sources) and adjustment of the machine.
If they are apparent only after the panels are installed then you need to look at whether the panels are bing fastened properly, including whether the clips are the right size, and how flat the roof deck is.
In some cases, ripples are unavoidable. It is always good though to do a little trouble shooting with the goal of minimizing them.
Todd Miller
2011-05-09 14:14:33.000000
Thanks. It is not easy but folks have been known to add backer rods to existing roofs.
Todd Miller
2011-05-09 23:37:23.000000
I don't think foam would help. Basically the backer rod puts a little crown in the center of the pan and that "takes up" the excess metal which is now rippling.
I hope we can help!
Todd Miller
2011-05-11 11:11:23.000000
Wow. I don't think I have any photos. I am sorry. I have heard many success stories though.
I don't think it's crazy at all to hold your installer accountable to do this.
Todd Miller
2011-05-11 11:39:49.000000
Justin, unfortunately I cannot predict that. I would say that if you get a warm sunny day and those panels still don't have ripples then it is unlikely they ever will. However, there's no harm in working them in beneath all panels.
Todd Miller
2011-05-11 20:20:32.000000
Justin, can you send me pictures of what is going on? todd@asktoddmiller.com
Todd Miller
2011-06-27 21:52:02.000000
In the process of installing a new roof and it is showing many dents (oil canning). It is 24g and GC has machine to form panels. How do I know if it is an install error? Also, how do you recommend that I address issue with GC. Can this be corrected? If so, how?
They have only placed a few panels am I worrying about it to early? Can this be corrected as it nears the finishing point?
If it was your roof, what step would you take next?
Thank You
Justin Edwards
2011-05-09 14:00:41.000000
Not sure, I did not get a chance to look at the panels prior to install but they were all piled on a flat bed trailer. Reading some of your earlier post is it possible to go back after the roof has been installed and add the Baker rod under the panel?
I'm not really happy with the roof so trying to find a way to salvage the project.
Thank you for the quick reply the last time.
Justin Edwards
2011-05-09 23:27:21.000000
What about going back and installing the foam board behind the metal? Would that correct most of the ripples/dents? Or, would installing the backer rods be the best way to go? If foarm board, what kind?
Thanks again for your reply. I think it is awesome that you are willing to do this!
Justin Edwards
2011-05-11 10:52:55.000000
Do you have any pictures of a project that someone used the backer rods? Just wondering what it looks like after installed. Rippling gone but do you now see something else?
Also, is it crazy if I ask my GC to go back now that the roof is almost done and install the rods? I had informed him of the rippling concern early on and he stated he would be able to adjust some of them out.
Justin Edwards
2011-05-11 11:27:13.000000
Should I have him install the rods just on the panels that are showing the problem or all panels. If I do not due all the panels now will the ones we do not due show ripples later? So, all or just the current problem areas?
Again, thank you!
Justin Edwards
2011-05-11 19:57:41.000000
ok, so the roof is now installed but several of the panels you can pull-up with your hand. The roofer stated this is normal and that it is due to the extreme temp. that we have been having 104+. Stated metal expands with heat but it is not concern. True? What do you suggest I do?
