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Unread 03-22-2021, 08:10 PM   #9
Tool Guy - Kg
Moderator -- Wisconsin Kitchen & Bath Remodeler
 
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Join Date: Feb 2005
Location: Oak Creek, WI
Posts: 22,832
A sealed bag for most manufacturers will last for up to 1 year if it's stored in a cool, dry place. One manufacturer that I know of that uses heavy plastic bags advertises that they'll last for up to 2 years. I wouldn't mess with that 3 year old stuff.

For your foam tray, did you end up shaving some of the foam tray down to match the height of your drain? Or did you add mortar to the drain flange? I ask, because your Kerdi membrane creates a seal with the drain when there is a very, very thin layer of mortar between the two. The mortar is porous, but when it is very thin, the hydrophobic nature of the Kerdi and drain flange prevents the water from sneaking through. However, if you put mortar on in a thick layer, it's not waterproof.
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Last edited by Tool Guy - Kg; 03-22-2021 at 08:15 PM.
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