"John Keiser" wrote in message


20 years seems poor service for the Monier roof.

I agree. In fact, I should probably talk to them about it.

I know it is often said "the membrane which is what actually keeps the
rain out" but I question that.
In Hawaii, Monier [generally the flat concrete] tiles were installed per
manufacturer's specs without a membrane for decades and still work well.

OK. Of course, there were also a lot of single wall houses built too ala
Q.C. Lum, Blackfield and numerous others. That's why I never owned a house
during my 40 years in Honolulu...what I could afford I didn't want, what I
wanted I couldn't afford. C'est la vie...

[Spec added membranes only in the 1990's.]
In Europe, Asia, plenty of clay tiled roofs without membranes have
worked
well for centuries.
Not that I would skimp on adding the membrane, but I think a properly
installed tile roof should do the trick without the membrane. I have
seen
issues develope when the house has shifted a bit over the years [common
in
Hawaii], causing the tiles to get out of alignment.

Around here it would
be common to be able to remove, stack on the roof, add a membrane for
extra assurrance and replace with little or no loss of the tiles. Not a
big or expensive job.

That's a good thought and one that had not occured to me. Thank you,
John.

--

dadiOH
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