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The Hotline: Serious Education ... plus the most fun you can have in metal finishing. Ted Mooney, Webmaster

Galvanized roofing for bathroom shower walls


Q. In an inspired or ignorant moment, I thought it would look cool to use galvanized roofing (both corrugated and V-crimp) as paneling and tub surround in a bathroom. Do I need to put some kind of topcoat on it to keep it from corroding with the constant steam from the shower?


Stewart C [last name deleted for privacy by Editor]
- Austin, Texas

A. Unfortunately I think so, Stewart. Galvanized coatings are not considered a decorative finish: the galvanizing will protect the steel, but in indoor use where it is wet and has little opportunity to "breathe" and form tight carbonate complexes with the carbon dioxide in the atmosphere, the galvanizing itself may corrode with white rust ("wet storage stain"). So you probably need to put a lacquer or clearcoat on this, and it will be hard to get good adhesion without a pretreatment that ruins the metallic look. You could try scrubbing it down it with trisodium phosphate [linked by editor to product info at Amazon], then washing with vinegar before lacquering -- but don't bet the farm on the lacquer sticking well. Good luck.

Ted Mooney,
Teds signature
Ted Mooney, P.E. RET
Pine Beach, New Jersey


All the paint experts I've talked to suggest that no kind of varnish/lacquer/urethane would adhere to galvanized. What about some kind of paste wax? Car wax?


Stewart C (returning)
- Austin, Texas


Hey Stewart,

You might want to try using Johnsons Paste Wax for hard wood floors. I had a similar posting for Galvanized counter tops; I got no response so I went looking. Johnsons says you can use this wax for metals. I waxed an area, and then put dabs of ketchup, soy sauce, water, vinegar and I let it sit over night. All of the above wiped clean the next day. Whereas on the unwaxed part it left some residue. Give it a try and see what you think.

Dwayne Hagan
- Pottsboro, Texas


I am installing galvanized roofing tin in my master shower and I was wondering what I would clean it with on a weekly basis to remove soap scum, etc. without damaging the tin?

Linda Tifft
home owner - N Las Vegas, Nevada


I don't really think that's a great application for galvanized metal, Linda. Galvanized metal requires good natural ventilation to provide plenty of carbon dioxide in order to maintain a "tight" adherent corrosion product, and I would be afraid that you'll get white rust instead in a shower application.

But if you are determined, then Dwayne's recommendation sounds like a good one.

Ted Mooney,
Teds signature
Ted Mooney, P.E. RET
Pine Beach, New Jersey

-- this entry appended to this thread by editor in lieu of spawning a duplicative thread

I am hoping to install a galvanized counter top in a mud room and would like to know if anyone has answers as to what type of sealant or finish should be used to protect it from stains.

Luke Puckett
homeowner - Scottsdale, Arizona


I'm writing in response to previous posts regarding using galvanized corrugated tin for shower walls. Some of these posts are quite old so I'm hoping that at least one of the attempted projects has been completed by now! Can anyone tell me whether or not you consider your project successful -- and if so, how did you prepare the galvanized tin for use in this water-y environment.


Dianne Graves
- Topeka, Kansas


I have read the postings and I am not certain there was a real response. I am wanting to utilize tin on my outside shower wall and the backsplash in my kitchen. Any response would be helpful!


Billy W. Sumrall
- Monticello, Mississippi

Hi, Dianne. I also would like to hear from people who have tried it rather than to continue to extrapolate based on book knowledge too :-)

Billy, there were responses that predicted lack of success for an indoor shower due to: 1). the galvanizing itself being unable to resist unsightly white rust in this wet but low airflow environment; 2). the unlikelihood of a durable lacquer or clearcoat being able to adhere to the galvanizing.

But an outdoor shower (plenty of air movement) is a very different thing, and indoor use in the drier environment of a kitchen might be fine too.


Ted Mooney,
Teds signature
Ted Mooney, P.E. RET
Pine Beach, New Jersey

Rust-Oleum Crystal Clear

December 1, 2009

I saw they used this in a magazine and am thinking of doing it in my bathroom they say to use Rust-Oleum Crystal Clear Enamel =>
before screwing them into place and they suggest using self sealing roofing screws and sealing with metallic caulk. I hope this helps. I have seen the use of the metal in restaurants and it looks really cute in the new modern ones.

Debbie Ingram
- Oklahoma City, Oklahoma

December 27, 2009 any of you have photos you can post..I am thinking of doing this!

Sec Tee
- San Francisco, California

Country Living magazine

March 8, 2010

I have a friend who did the galvanised in her kitchen. It rusted after about 4 years near the sink. About 1 foot out on either side where folks stacked the dishes.

I do not recommend it on a wet counter.

If you had a dry food prep area that would be different. Over by her microwave and over where she kept her toaster and coffee maker it still looks good.

Carol Vance
- Austin, Texas

October 24, 2010

The article that has a picture and the process along with the materials are in the June 2009 Country Living Magazine.

Dianna Briggance
- Grand Rapids Michigan US

March 20, 2011 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

Can galvanized sheetmetal be installed on the walls in a kitchen or dining room as a wall covering / decoration where it can be touched by humans. will a/c or heating conditions affect the oxidation process? For instance condensation.

carl moore
homeowner - kerrville texas usa
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