A small problem to expose you: I live in a DRC, and I noticed a kind of corrosion at the feet of the wooden frames of the interior doors (on a height of 15 cm), as if the wood begins to age while spreading in height. I have repeatedly applied linseed oil, but this wood disease still persists. I would love to receive your advice and the kind of product to use to stop the amplitude of this wood corrosion.
The description of the problem seems to indicate a rise of moisture by the soil. To stop this rise, it must be able to cut the frame flush with the ground, so that the wood is no longer in contact with the wet ground. Logically, the frame being sealed on the periphery of the walls, this action must not compromise the solidity of the whole. You can also inject a wood hardener to reinforce it.
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