Sketch of a garage entrance showing leca, metal sheeting, and plastic covering wood, with concerns about moisture absorption due to porous materials.

How do I prevent moisture from getting behind the sheet metal that will clad the doorway? The plastic covers all the wood but I am afraid that moisture will penetrate behind the plastic because the leca is porous and absorbs moisture.
 
It is a bit difficult to understand what the picture is supposed to show.

What kind of sheet metal is it and what is its function?
The same goes for the plastic.

Perhaps you have a camera and can take a picture, and explain a little more thoroughly as well?
 
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Vi vill skicka notiser för ämnen du bevakar och händelser som berör dig.