Some additional remarks to the topic:
1st the condensating at the windows
proves too high air humidity which
condensates at colder parts.
2nd to stop
condensating by new airtight windows will cause
condensation at the next cooler
parts - the interior sites of the
exterior walls. And then mold will follow. So
it would be quite good
to have a forced condensation only at the panes.
out the upper rubbers of your windows. The little more fresh
air you will get in
maybe is enough to reduce the air humidity
without causing structural damage and
4th to insulate the exterior walls by usual thermal lightweight
insulation (fiberglass, polyfoam etc.) will not hinder condensation
can not help against energy losses in spite of the
industrial point of view.
We have tested this out by experiment ('Lichtenfelser Experiment',
well known in
Germany) and practical comparing of appartment houses
with and without
additional thermalinsulation. Reason: Thermal
insulation can not stop IR
radiation which causes about 99% of warmth
transport. Look to the figure, it
shows the temperature at the
opposite of materials after 10 min IR radiation
with a redlight bulb.
Materials from above: fiberglass, styrofoam, foamglass,
board, solid brick stone, gypsum card board, solid pinewood:
Here you can see no effects of
additional thermal insulation of
25-appartments-house 6 (blue line) in 1988 to
the heating costs - 1
Million Marks has been spent for nothing!
The link gives some info to get rid with too much moisture in the
attack - A
Define too high air humidity (how can it be humidity without air? :-)
That would only occur if there was no vapor barrier. That's why vapor
barriers are there.
An interesting dehumidifier. Would it not only cause mold there????
And you did some measurements on this??
Of course it will not stop condensation, that's why we use a vapor
That seems to conflict with my physics classes, of course maybe IR has
changed in the last 35 years.
I am not sure where you are coming from, but it seems your theories, if
I understand them, are not exactly main stream and seem to conflict with
most available information on the subject, as well as my personal
2nd That would only occur if there was no vapor barrier. That's why
barriers are there.
> 3rd An interesting dehumidifier. Would it not only
> 4th And you did some measurements on this??
Of course it will not stop condensation, that's why we use a
> 6th That seems to conflict with my physics classes, of course maybe
changed in the last 35 years.
> 7th I am not sure where you are coming from,
but it seems your
theories, if I understand them, are not exactly main stream
to conflict with most available information on the subject, as well
> observations .
> Joseph Meehan
Thank you Joseph for
your sceptic, humorous and open minded point of
view, which I lika a lot. I'll
try to answer, please forgive me my
poor english, I am not a native speaker and
1st Too high humidity is shown by condensate - if its
too high (for the room and construction behaviour, for the
security against mold attack) - if not, it may be ok. I will give no
rates/numbers/ranges, because condensate is the important thing. And
material pores humidity can condensate <65% RH because of
hydrogen bonds between
pore surface and humidity.
2nd Also the vapor barrier is colder than the room
air. So it must
condensate inside the barrier if RH is high enough - and in
with airtight windows, certainly this case occurs often enough.
addition the barriers can not work for long time in lightweight
Thus constructions move around whole the year, what
damages the fixing/bonding
of the barrier and the barrier by itself
is ageing and will be not the same
after some time. You know the
cracks in synthetic materials by ageing - this
happens in every
barrier material I know.
I saw such cases often, as I am
architect for old buildings since over
20 years, planned the restoration in over
400 projects and have
consulting practise all over Germany.
3rd Maybe. But
normal people will dry the condensate daily, and clever
people will have better
airing and heating to get rid with condensate
by most simple means. The
advantage is that condensate at the single
pane is better than and will hinder
riskful condensate in wall, floor
and ceiling. Thats it, isn't it?
4th I don't
need measurements, I have experienced it in a lot of
consulted problems from my
collegues and mine in Germany. Otherwise I
would not say any word about it,
believe it or not.
5th see 2nd
6th Good joke ;-) But what have you learnt
about IR radiation,
transmisson and conductivity? 'There are three ways of heat
... etc.' I did learn the same. But what about the rates? Nothing.
you? If you will know something more of my point of view about
this in the
thread in popular writing, please post. I don't want to
give annoying huge
7th Its not main stream, but its real live! My (and my scientific
friends) position is well known in Germany and discussed there since
also in the most important TV broadcasters. Search only my
first name in Google,
you will find me on the first page, look
'Altbau' (Old building)- thats my page
under the first 3 worldwide.
I would recommend a visit to the link before next
thanks for your very critical post. I will add some remarks and as I
suppose that you have not read my upper post I will repeat some
for the audience):
To rip out the rubbers is a very good idea and best practise
Germany. We have about 50% of all houses attacked by mold. Nearly All
them have one detail common: airtight windows. A lot of old houses
mold, after changing the old windows against airtight ones,
mold attack follows.
The ripped off rubber is THE Remedy. And costs
nothing, done by DIY.
I know the
results of Gustav Robert Kirchhoff. You should discuss the
result of this
experiment, if you will try to refute me in correct
It shows the temperature rising of
several insulation boards and solid
materials, all 4 cm thick, after 10minutes
infra-red radiation by a
redlight buld. Temperature is measured at the opposite
of the boards.
From above: fibreglass, styrofoam, foamglass, solid brick, wood
board, gypsum card board, solid pinewood.
Only the solid materials can
really hinder IR radiation. The results
of the leightweighter are awful, don't
you think so?
Further details here:
airtight windows, damp
and mold attack
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