ᐅ Partition wall in a steel prefabricated garage

Hello everyone.

Our prefabricated garage was installed on Monday. We chose a large steel prefab garage measuring 6 x 9 m (20 x 30 ft) from the company "Garagenrampe." We now want to add a partition wall inside.

I would like to build this using metal studs similar to those used in drywall construction. On these, I would first attach OSB boards, and then either gypsum board (drywall) or cement fiberboard on top.

My question is: Would this be feasible in an unheated garage where there is some moisture present? Is it possible to use OSB boards, for example? And is it really necessary to use cement fiberboard, or would impregnated gypsum boards be sufficient?

My main concern is mold growth.

Thank you very much in advance.

dopamine1887 schrieb:

We decided on a large steel prefabricated garage measuring 6x9m (20x30 ft) from the company "Garagenrampe." We now want to add a partition wall inside it.

Wow, what do you plan to do with such a huge steel garage?
They are only somewhat suitable as a basement substitute. Climatically, they feel like dripstone caves.
What’s the purpose of a (fully enclosed) partition wall there?
If you want a space for lawnmowers, motorcycles, etc., I’d recommend sectioning it off with welded wire mesh panels, especially if you plan to keep the door to the parking spaces open during the day.

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We also have a garage like that, measuring 5x6 meters (16x20 feet). We store suitcases, camping gear, and outdoor decorative lighting in it, among other things. It works very well. It’s not like a cave with dripping water because it’s well ventilated. Occasionally, a few drops collect on the ceiling and fall down when you park a wet car inside. This year, we repurposed it by placing all our boxes with belongings on one side, and the motorcycles are on the other side. There’s no moisture at all.

But to answer the main question: I wouldn’t use drywall. I’m not a construction expert, but I wouldn’t feel comfortable with that. We once had a drywall panel left over in the garage. It didn’t develop mold, but it completely warped. OSB would definitely work. However, I would probably opt for trapezoidal metal sheets. That seems the best fit to me.

We also have a 9-meter (30-foot) long double steel garage.
Bicycles, children’s toys/vehicles, garden tools, some tools/workbench – and just like that, the back part is full.

I reinforced part of the garage wall with OSB panels to hang my garden tools. Since my garage doesn’t have a concrete slab but is paved, moisture initially came mainly from below. When it rains heavily, moisture can also seep in up to 10cm (4 inches) between the paving and the garage walls. For this reason, I separated the OSB panels from the paving at the bottom. This setup has worked without issues for several years now. However, I wouldn’t recommend using drywall either.

Ok, thanks first for the responses. So OSB is fine, gypsum board rather not. We would prefer OSB panels because it is quite easy to hang devices or cabinets on them (as Musketier also described). Would Fermacell boards be a better alternative to drywall then? The problem is that my wife wouldn’t like the look of a plain OSB wall.

OSB boards come in different moisture resistance classes, so make sure to get advice on this. And yes, you can also paint the boards—actually, quite nicely 😉