Building materials that should never have been made

Martin_B · 2019-03-06T19:56:15+00:00

As a sibling thread to "Tools that should never have been made," I'm starting this one. First up is: All windproof fabrics in water resistance class W2, W3, or worse. Pure junk that should never have been invented. Their only function is to protect against wind, but they don't protect against moisture particularly well and are often not as vapor-permeable as the higher water resistance class W1 (paradoxically enough). Useless for protecting construction during building time, as the frame gets wet underneath if it rains on the fabric, leading to black mold. Equally useless to have behind an air gap where insulation ends up behind, which might be the most common placement of it. Precisely because condensation water, after a short time, goes through the fabric, right into the frame and insulation. Another placement could be behind, for example, west coast panels or similar facade panels, which means it is protected from rain directly on the fabric, so it possibly works for that. The only advantage is that it's cheaper than fabrics in class W1. I believe it should never have been made since it doesn't protect against moisture as it should, and is less vapor-permeable.

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Höghus

#61

Know-It-All · Stockholm

· 3 244 posts

31 Jul 2021 at 11:12 PM

Höghus

Know-It-All

Stockholm
3,244 posts

31 Jul 2021 at 11:12 PM

buspojken said:
Composite decking
What crap this is

I found an excellent use for composite decking. I attached a level sensor for the drainage pump to one and sent it down into the collection well.

/Höghus

Composite decking with a drainage pump level sensor attached, placed over a lawn near a well opening.

Building materials that should never have been made

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