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Hard to believe

24K views 99 replies 16 participants last post by  loneframer 
#1 ·
Siding Roof Property House Home


I came across this job recently in an upscale development. I don't know the builder or the mason but it is hard to believe that someone is still so ignorant of the proper way to prep for thin veneer stone.
I have seen the results of this type of installation often when I am called to look at a three year old house with leaks and black mold. The tear off and replacement is ugly and expensive, and I hate this kind of work. The only ones happy in the whole mess are the lawyers.
 
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#53 ·
the first you mention is a water column test,it's not a hold an inch of water in a puddle test but a specific height of a column of water

the other you speak about is also known as the ''boat test'' they make a little boat out of the material and sprinkle in a powder that changes color in the presence of moisture,then they float it in water to see how long it takes for the color to change

because of tyveks higher permeability it can not pass the boat test but does great in the water column test which DuPont claims is a more accurate permeability test
 
#58 ·
Well you seem to know a lot about it but when I did my research the specific test was that the product needed to hold a puddle of water 1" deep for an hour without passing any water. Tyvek lasted something like 2 hrs and typar lasted an hour 5 mins or something. I remember that very specifically because it seemed like such a real life test. One that actually means something to me. The other was just a result saying that tyvek allowed 1gram of water vapour through each mm2 every 5 minutes (or something I don't remember since it wasn't the same real life type result)

I know that I said ASTm earlier but it was actually a CAN/CSA specification which is usually but not always the same as ASTM standards.
 
#68 ·
no they are not directional,but being that typar is coated on one side that is the side that should face out

as far as the differences in the performances you state remember it's all relative

you don't usually need or want a totally waterproof or extremely high permeability wrb
 
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