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Author Topic: Non-routine News  (Read 8644 times)

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AGelbert

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Re: Non-routine News
« Reply #135 on: January 29, 2018, 02:19:49 pm »
BSC Newsletter Issue #103

Building Science Corporation

BSI-102: The Coming Stucco-Pocalypse

January 29, 2018 1:37 PM

How can you take a system with thousands of years of history and screw it up?  Easy.  Keep improving it until it does not work.  Babylonians used it. Egyptians used it. Greeks used it.  Romans used it (Photograph 1).  Everyone used it…and everyone uses it. But it sure has changed and what we put it over sure has changed.

Photograph 1: (and several other photographs at article link)  Pompeii – Stucco applied over Roman brick.  Minor issue with Mount Vesuvius   in 79 A.D.

Over several millennia[1] stucco has gone from lime-based to lime-Portland cement-based to Portland cement-based to polymer modified….and each step of the way it has gotten stronger…and less vapor permeable.

This has had huge consequences.  Duh.  When walls get wet they can’t dry.  They used to be able to.  Today?  Not so much.

.….Read the entire article at buildingscience.com.

https://buildingscience.com/documents/building-science-insights/bsi-102-coming-stucco-pocalypse

Footnotes
[1]  ”kiloyears” Yes, this is a valid term.  Who knew?     
Rob not the poor, because he is poor: neither oppress the afflicted in the gate:
For the Lord will plead their cause, and spoil the soul of those that spoiled them. Pr. 22:22-23

 

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