Guest User
3/26/2016
I have a standing seam steel roof that on one side the paint is coming off, I assume the previous owners had a chimney fire. We need to have it repainted and we are unsure what the procedures are to do this the right way. We have had a couple people out to the house and we are getting conflicting stories and much varied estimates. We want to hire someone who knows what they are doing. I have done some research and it seems this area needs to be sanded and primed and then painted. We don't know what brands (I see PPG has a line). We have to do this right because we are putting solar panels over it, and repainting it again is not an option. If I could have the steps, and what is involved, that would be great. I am attaching the really bad part of the roof, then on the other side of the house we have some minor rust spots. We have no idea who manufactured the roof.
Eric Novotny
An informed customer is the Best Customer!
3/27/2016
The paint degradation is not likely from a chimney fire as much as it is from the acid byproducts of the combustion process at that flue. I would look at installing a different type of cap as part of any painting or refinishing process.
Guest User
3/27/2016
The cap was just installed. We have had oil heat for 13 years.
Eric Novotny
An informed customer is the Best Customer!
3/27/2016
I am guess there was a cap there before though? The combustion process, whether you are burning wood, oil, gas, etc, is going to create acid byproducts. That is likely what has stained and discolored the roof.
Guest User
3/27/2016
No cap before. Roof was not this bad when we bought the place.
Eric Novotny
An informed customer is the Best Customer!
3/27/2016
Might want to see if it is cleanable. The acid etching of the painted surfaces will worsen over time as the protective paint finish is broken down and now exposed to the UV light of the sun.
Todd Miller
Isaiah Industries, Inc.
3/27/2016
You can try to clean it very well and then primer and repaint it (ideally with an air-dry Kynar such as PPG AquaTec) but I am really concerned it won't hold. Is there any way to replace the affected panels?
Guest User
3/27/2016
Here is a thought. The previous owner (we have an unfinished attic) had insulation batts on ONLY that side of the roof. I just read a blog on how rapid corrosion is attributed to condensation being trapped between the outer sheet and the supporting deck. This may be the case for my roof, as that is the ONLY side that was affected with the paint coming off. The opposite side of the roof IS NOT having the same reaction, as the guy we bought the house from had NOT put batts of insulation on that side. If you are interested in the blog, google ' corrosion of fully supported metal roofing '. I removed the batts of insulation 2-3 years after buying the house.

If you would like to reply to this thread, please log in. If you do not have an Ask the Experts forum user account, create one here.

Find a Contractor

Get Started Today

Take the first step to increasing the value of your home with a great looking, durable, fire resistant and energy efficient metal roof. Browse our list of qualified MRA Member Roofing Contractors in your area for a free consultation and estimate.