# Translation
Common wood will rot with constant humidity, especially if you don't treat the wall first. Stainless steel, aluminum, and painted steel are much more resistant to humidity and won't degrade like wood. If you want something that holds up well, look for industrial metal shelving or galvanized steel, which are pretty durable and affordable. Tempered glass also works well if you prefer something more aesthetic.
But here's the important part: the shelving is only half the problem. If the wall keeps getting wet in winter, you need to fix that first or whatever you put there is going to suffer anyway. Check for leaks, whether ventilation is poor, or if there's condensation. Sometimes it's enough to improve air circulation or seal cracks. If it's a more serious structural issue (broken pipes, wet foundation), there's no point putting up iron shelving if the humidity keeps rising.
My recommendation: invest first in fixing the humidity. In the meantime, if you urgently need to store things, use metal shelving from hardware stores, not wooden furniture. And avoid storing anything delicate or documents there until you've got the problem under control.