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Posted by - Bob - on July 9, 2006, 5:24 pm
On 9 Jul 2006 11:12:48 -0700, "MDT at Paragon Home Inspections, LLC"
>Almost all grouts (some epoxy grouts are an exception) are somewhat
>permeable to water, in any case there are will likely be mechanical
>imperfections in the grout, increasing over time, which will admit
>water by capillary action
>
>Generally tiled bath and tub walls are installed to a rigid backing
>material highly resistant to water damage ("Durock" is a common
>example) with a vapor barrier behind that, if a tub or shower floor is
>tiled it's generally installed over a (hopefully) watertight assembly
>called a "pan", which usually incorporates a waterproof
>"liner".
OK... lets move on then....
Are there any products that could be used to waterproof or water
resist older grout ? This particular shower not built over any sort of
cement board. it looks like some sort of plaster board with paper
covering of some sort. Not standard sheetrock but not much more
appropriate I don't think. ... this is from the 70's so who knows.
It is in good shape and the deteriorated areas that I repaired were
over the edge of the fiberglass pan so they are not an issue. However,
I am concerned that what I found under there was not a proper surface
and that if the grout wicks water it will eventually destroy the rest
of the unit.
Anything that can be done preventively to prolong the life a few
years?
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