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Unread 03-09-2021, 09:20 AM   #3
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Join Date: Jul 2005
Location: Massachusetts
Posts: 1,039
I’ve found Hydroban board to be stiffer than Kerdi board.

I prefer the screw / washer combo of k-board. For h-board I’ve had instances where the screw is properly recessed but it didn’t pull the board tight against framing.

H-board corners I use the fabric banding like k-band. Sealant works but according to tds it takes 40 hours to fully dry (but you can proceed on it next day I think) and it does give off noticeable fumes.

It seems weird that h-board system requires a certain sequence when banding changes of plane. K-board is fine any sequence as long as there’s 2” overlap.

I wouldn’t mix and match systems.
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