Can I use corrugated metal “roofing” material as siding for my shed?
Howdy, from the Apron blog.
We published a short article a while back about the clever ways people have used corrugated metal. It’s generated a number of questions asking how to hang sheet metal on a basement ceiling, how to hang corrugated metal on the walls in a family room, and the best way to cut corrugated sheet metal. You guys had terrific answers every time.
Here’s new question sparked by that original blog article, from readers Sarah and Adam:
Hey Home Depot Experts!
My husband and I would like to side our garden shed with corrugated metal. The product we found at our HD is listed as a roofing piece. Is it possible to use it as a siding? If so, any special considerations?
We love the look of the metal, but will probably combine the s />
Thanks a bunch,
Sarah and Adam
They don’t say exactly which “product” they’re thinking of using, but it’s all pretty much the same– whether you plan to use it on the roof or as siding, right?
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I have a few thoughts on this, and maybe others on the Community may want to chime in with their 2¢.
First, using metal roofing material as siding is a perfectly acceptable practice.
The common galvanized corrugated metal roofing panels and also aluminum panels do need some special considerations for this shed application though. Often the shed will have pressure treated lumber, especially near the ground. The older copper arsenate lumber used until about 2004 is not an issue, but the newer stuff with its much more concentrated copper becomes corrosive to metal panels. The easiest fix is to use either plastic sheeting or 30# roofing felt between the panels and treated lumber to act as a buffer. This is actually a good idea even where there is no pressure treated wood. It keeps moisture away from the back side of the panels. Also, stainless steel fasteners should be used rather than galvanized nails or screws. All fasteners need to either have rubber sealing washers under the head or be sealed with caulk as they are installed to keep rain out.
If the corrugated ribs are run vertically, make sure to flash the tops and bottoms to keep insects from making a home under the ribs. Horizontal runs will butt up against corners and can be simply caulked. Use a non-acid cure caulk to prevent reaction with the metal. GE Silicone II is an example.
I assume that the shed already has wall sheathing of some sort. If you are taking the wall down to bare studs you will want at least 1/2″ plywood sheathing to support the panels.
Last but not least is painting. If you use galvanized sheet metal and want to paint it you will need to use a primer that can tenaciously adhere to the zinc coating. Many oil based primers will work well but one easy to use water based primer I’ve personally had success with would be Zinsser Bulls Eye 1-2-3. Paint will stick to the primer but will not directly stick to galvanized metal.
Last, I would keep the metal paneling at least 6″ off ground level if at all possible.