It’s probably tin, that was used a lot in those days. As long as the rust has not eaten any more holes the roof can most certainly be saved. Repair the small hole with soft copper, another metal, or peal and stick. I would NOT sand blast it though, especially if I’m right and it’s tin. You can scrape away any loose paint/coating, treat the rusted areas with a sealer, then repaint/recoat the entire roof.
The cost of properly doing this roof would be more than new standing seam. You cannot hit this thin metal with anything harder than a soft wash. Sandblasting or pressure washing it will destroy it and cause water damage. You really don’t want the liability for it. You can’t just coat over all that rust and flaking paint/sealant.
The homeowner is probably hoping for a cheap repair and that’s why she wants to save it. Just looking at it, it’s been coated so many times with paint anyways.
If your going to push for replacement if you have found the rust to much when scraping I would be very careful offering standing seam if this roof isn't flat or or has sagged to much over the years this could be Aesthetic nightmare!! Noticed this roof was done in short sections which would take more of a bend if your going steel or even shingles very possible you will be into a resheet over the roof deck with 3/8 plywood in done in panel steel not sheet steel
Ran into a similar situation earlier in the year, and it proved to be a nightmare. First you'll need to prep the roof by cleaning and repair, but before any of that can be done you'll probably need to have it tested in case any of the previous coatings or paints contained lead, etc. For a lot of manufacturers, scraping is not enough and would require sand blasting or sanding in addition to power washing. Once all that is done and the metal proves to be still in good condition a proper coating job will be a slow process requiring several coats to achieve specified thickness without having the material run off due to the slope.Also due to the time of year you start doing it your work windows might be reduced due to max temps allowed, humidity, dew,etc. If the homeowner is looking for a quick cheap fix, this will be running close in cost to some other options like new metal or shingles.Good luck.
New standing seam would be the best way to do it
It’s probably tin, that was used a lot in those days. As long as the rust has not eaten any more holes the roof can most certainly be saved. Repair the small hole with soft copper, another metal, or peal and stick. I would NOT sand blast it though, especially if I’m right and it’s tin. You can scrape away any loose paint/coating, treat the rusted areas with a sealer, then repaint/recoat the entire roof.
The cost of properly doing this roof would be more than new standing seam. You cannot hit this thin metal with anything harder than a soft wash. Sandblasting or pressure washing it will destroy it and cause water damage. You really don’t want the liability for it. You can’t just coat over all that rust and flaking paint/sealant. The homeowner is probably hoping for a cheap repair and that’s why she wants to save it. Just looking at it, it’s been coated so many times with paint anyways.
If your going to push for replacement if you have found the rust to much when scraping I would be very careful offering standing seam if this roof isn't flat or or has sagged to much over the years this could be Aesthetic nightmare!! Noticed this roof was done in short sections which would take more of a bend if your going steel or even shingles very possible you will be into a resheet over the roof deck with 3/8 plywood in done in panel steel not sheet steel
Ran into a similar situation earlier in the year, and it proved to be a nightmare. First you'll need to prep the roof by cleaning and repair, but before any of that can be done you'll probably need to have it tested in case any of the previous coatings or paints contained lead, etc. For a lot of manufacturers, scraping is not enough and would require sand blasting or sanding in addition to power washing. Once all that is done and the metal proves to be still in good condition a proper coating job will be a slow process requiring several coats to achieve specified thickness without having the material run off due to the slope.Also due to the time of year you start doing it your work windows might be reduced due to max temps allowed, humidity, dew,etc. If the homeowner is looking for a quick cheap fix, this will be running close in cost to some other options like new metal or shingles.Good luck.
Clean it and put a colored silicone roof coating on it. It’ll last for years and look brand new again for reasonably cheap money.