But they partly absorb moisture and can retain this (if aeration is not sufficient), so that the retained humidity ("stagnant humidity") in the adhesive has a long influence on the bonded surfaces, and this can cause the metal corrosion. (from weisschemie.de)

I think this would be a good reason for the guarantee not applying.

I think this refers to the structural dampness some buildings suffer from, and that 'stehend' here means (long) standing, existing damp, which is in fact part of the structure:
http://en.wikipedia.org/wiki/Damp_(structural)

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Note added at 28 mins (2012-02-29 12:28:46 GMT)
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http://en.wikipedia.org/wiki/Damp_(structural)

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Note added at 29 mins (2012-02-29 12:30:29 GMT)
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If there is a problem opening the link, click on 'damp (structural) where it asks "Did you mean? damp (structural)

We're talking furniture, so I assume they just mean pools of water on the furniture that haven't been cleaned up immediately (e.g. you knock over a vase of flowers and don't mop up the water). It's certainly not "structural" because the reference is to furniture, not to buildings, and it's not "permanent" (it could be a one-off for a period of time, or it could be intermittent).


As with all wood products, be sure to completely dry when polishing as standing moisture may damage the finish.
www.rhoom.com/RhoomRedesign/prodinfo.htm


Air which is too humid and standing moisture can cause permanent damage to your furniture.
www.prenneis.com/uploads/media/care_instructions_01.pdf

might work here. In furniture warranties, "stehende Feuchtigkeit" usually refers to spills of liquids/water e.g. from glasses on tables, or condensation in high humidity that leaves a film of liquid, e.g. on the edges of furniture, and negligence like wiping the floor under a piece of wooden furniture using too much water/liquid thus immersing wooden legs in liquid.

"Never leave standing water, glasses containing chilled liquids or hot containers on the table. This kind of neglect can cause moisture rings, veneer lifting, finish checking, or crazing. Your table is not guaranteed against moisture damage due to neglect."
http://www.jeromes.com/en/service_furniture_care

"Heat or standing water will cause a great deal of damage to a lacquered finish. Never place anything hot directly on your table top. Use a table pad, place mats, or coasters when serving food or drink."
http://www.schneidermans.com/style_center/furniture_care.php


"Wood finishes in general are porous to allow moisture to pass through and keep the wood below conditioned. This porous surface also allows standing liquids to penetrate which causes the wood to swell. This swelling causes the seal between the finish and the wood to separate. When the swelling subsides, air is trapped between the finish and wood. The result is a light, blurry appearance that can not be cleaned away. Cold containers of liquid will sweat on the outside of the container when placed in a warmer environment. It is best to protect wood surfaces from liquid damage by flower vases, drinking glasses, soda cans or any objects that hold fluid...."
"The effects of too much heat are similar to the effects of standing water on the finish.
http://oakstoreaz.com/Wood Care.html

standing moisture
"Take precautions to avoid standing moisture. Water and wood floors do not mix. Never wet mop a wood floor, and always clean up spills and standing water as soon as possible. With water or any other cleaning agent, be sure to thoroughly ring out the applicator or mop prior to applying it to the floor."
http://www.ecotimber.com/guide/floor-cleaning.html

standing water (here this refers to outdoor furniture)
"Make sure to keep your wood furniture free of standing water. Don't leave pieces standing in water or let chairs fill with water during a rain.
http://www.ehow.com/how_5785862_preserve-outdoor-wood-furnit...