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Bob is right, in that ventilation is the key.
My car is outdoors in a carport all winter, but even though I am near =
the coast it doesn=E2=80=99t get moldy because of the free air =
circulation. It=E2=80=99s under a cover, but the windows are cracked, =
and I do drive it from time to time (it would be driven regularly in a =
normal year).
--
Max Heim
'66 MGB
> On May 6, 2021, at 3:34 PM, Robert's New iPad <mgbobh@gmail.com> =
wrote:
>=20
> Concrete may, if thick enough, be _water_proof (think dams) but =
when used as a floor it is not _vapour_proof. Vapour comes right =
through six inches of concrete, almost as readily as through bare earth.=20=
> A responsible installer of tile, vinyl, carpet or anything else =
will tape a pane of glass down onto a concrete floor that is poured on =
ground, then check for condensation on underside of the glass a day =
later. One should not place a bet that there will be no condensation; =
there almost always is. That=E2=80=99s why carpets on lower-level of =
houses will smell musty after a year or so; it is because they are =
musty. =20
> Any conscientious home builder will put a layer of 10-mil plastic =
sheeting on top of the crushed rock before he pours the concrete. I =
read about one once; have never met one.=20
> There are ways to seal the concrete, ways of greater or lesser =
effectiveness. One commonly-used product in USA is =E2=80=9CDryLock=E2=80=
=9D, a coating for concrete that is pretty effective at stopping =
moisture vapour seeping through the concrete. It is simple to apply, =
but hard work, as the thick material must be scrubbed into the concrete =
floor and walls to achieve the sealing effect wanted. It works; I used =
it on the lower level of my raised-ranch house and found the =
dehumidifier ran half as much. =20
> In a garage, I would work at improving ventilation before messing =
around with concrete sealer. Code for a house is one sq foot of =
ventilation per 1000 square ft of house. That is entirely inadequate, =
especially so when one realises that ordinary window screen reduces air =
flow by 50%. A 12x20 ft garage is 240 sq feet, and really should have =
a vent at each end, or ridge vent its entire length. That is way in =
excess of code requirements, but will reduce considerably condensation =
from moisture through the floor.
> Bob
>=20
>=20
> On May 6, 2021, at 5:20 PM, Max Heim <mvheim@sonic.net =
>=20
>> Theoretically it will form on the underside of the plastic=E2=80=A6 =
which will not be good for your carpet, which should be removed.
>>=20
>> Leave the cover off for ventilation, as much as possible (obviously =
you might want to cover the car if you are running the saw or the belt =
sander, or spraying paint). If you could leave the windows down, at =
least a few inches, it would help. Surely mice can=E2=80=99t climb up =
sheer glass=E2=80=A6
>>=20
>>=20
>> --
>> Max Heim
>> '66 MGB
>>=20
>>> On May 6, 2021, at 2:06 PM, Frank Krajewski <frankk12@verizon.net =
>>>=20
>>> I have received many great suggestions from the list. A simple start =
will be to create a moisture barrier between the concrete floor, which =
at present has a carpet, and the MGB. This will be in the form of a =
tarp or plastic sheet. Excuse my na=C3=AFvet=C3=A9 but what prevents =
moisture from forming on the tarp or plastic?=20
>>> Frank Krajewski
>>> 1980 MGB LE
>>> 1991 Mazda Miata SE
>>> 2003 RAV4
>>> 2021 Subaru Outback Limited=20
>>>=20
>>> Sent from my iPad
>>> _______________________________________________
>>>=20
>>> Donate: http://www.team.net/donate.html =
<http://www.team.net/donate.html>
>>> Suggested annual donation $12.75
>>>=20
>>> Archive: http://www.team.net/pipermail/mgs =
<http://www.team.net/pipermail/mgs> http://autox.team.net/archive =
<http://autox.team.net/archive>
>>>=20
>>> Unsubscribe: =
http://autox.team.net/mailman/options/mgs/mvheim@sonic.net =
<http://autox.team.net/mailman/options/mgs/mvheim@sonic.net>
>>>=20
>>=20
>> _______________________________________________
>>=20
>> Donate: http://www.team.net/donate.html =
<http://www.team.net/donate.html>
>> Suggested annual donation $12.75
>>=20
>> Archive: http://www.team.net/pipermail/mgs =
<http://www.team.net/pipermail/mgs> http://autox.team.net/archive =
<http://autox.team.net/archive>
>>=20
>> Unsubscribe: =
http://autox.team.net/mailman/options/mgs/mgbobh@gmail.com =
<http://autox.team.net/mailman/options/mgs/mgbobh@gmail.com>
--Apple-Mail=_60EE37EB-56E5-4635-9AEA-61F2CB926E5D
Content-Transfer-Encoding: quoted-printable
charset=utf-8
<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">Bob =
is right, in that ventilation is the key.<div class=3D""><br =
class=3D""></div><div class=3D"">My car is outdoors in a carport all =
winter, but even though I am near the coast it doesn=E2=80=99t get moldy =
because of the free air circulation. It=E2=80=99s under a cover, but the =
windows are cracked, and I do drive it from time to time (it would be =
driven regularly in a normal year).</div><div class=3D""><br =
class=3D""><div class=3D"">
<div style=3D"color: rgb(0, 0, 0); letter-spacing: normal; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;" class=3D""><div style=3D"color: rgb(0, 0, 0); =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><div style=3D"margin: 0px; font-size: 13px;" =
class=3D"">--</div><div style=3D"margin: 0px; font-size: 13px; =
min-height: 16px;" class=3D"">Max Heim</div><div style=3D"margin: 0px; =
font-size: 13px;" class=3D"">'66 MGB</div></div></div>
</div><div class=3D""><br class=3D"webkit-block-placeholder"></div>
<div><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D"">On May 6, 2021, at 3:34 PM, Robert's New iPad <<a =
href=3D"mailto:mgbobh@gmail.com"; class=3D"">mgbobh@gmail.com</a>> =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><div =
dir=3D"ltr" style=3D"caret-color: rgb(0, 0, 0); font-family: Verdana; =
font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;" class=3D""></div><div dir=3D"ltr" style=3D"caret-color: rgb(0, 0, =
0); font-family: Verdana; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;" class=3D""> Concrete may, if thick =
enough, be _water_proof (think dams) but when used as a floor it =
is not _vapour_proof. Vapour comes right through six inches of =
concrete, almost as readily as through bare earth. </div><div =
dir=3D"ltr" style=3D"caret-color: rgb(0, 0, 0); font-family: Verdana; =
font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;" class=3D""> A responsible installer of tile, vinyl, =
carpet or anything else will tape a pane of glass down onto a concrete =
floor that is poured on ground, then check for condensation on underside =
of the glass a day later. One should not place a bet that there =
will be no condensation; there almost always is. That=E2=80=99s =
why carpets on lower-level of houses will smell musty after a year or =
so; it is because they are musty. </div><div dir=3D"ltr" =
style=3D"caret-color: rgb(0, 0, 0); font-family: Verdana; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
normal; letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;" class=3D""> =
Any conscientious home builder will put a layer of 10-mil plastic =
sheeting on top of the crushed rock before he pours the concrete. =
I read about one once; have never met one. </div><div =
dir=3D"ltr" style=3D"caret-color: rgb(0, 0, 0); font-family: Verdana; =
font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;" class=3D""> There are ways to seal the concrete, ways =
of greater or lesser effectiveness. One commonly-used product in =
USA is =E2=80=9CDryLock=E2=80=9D, a coating for concrete that is pretty =
effective at stopping moisture vapour seeping through the concrete. =
It is simple to apply, but hard work, as the thick material must =
be scrubbed into the concrete floor and walls to achieve the sealing =
effect wanted. It works; I used it on the lower level of my =
raised-ranch house and found the dehumidifier ran half as much. =
</div><div dir=3D"ltr" style=3D"caret-color: rgb(0, 0, 0); =
font-family: Verdana; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;" class=3D""> In a garage, I would =
work at improving ventilation before messing around with concrete =
sealer. Code for a house is one sq foot of ventilation per 1000 square =
ft of house. That is entirely inadequate, especially so when one =
realises that ordinary window screen reduces air flow by 50%. A =
12x20 ft garage is 240 sq feet, and really should have a vent at each =
end, or ridge vent its entire length. That is way in excess of =
code requirements, but will reduce considerably condensation from =
moisture through the floor.</div><div dir=3D"ltr" style=3D"caret-color: =
rgb(0, 0, 0); font-family: Verdana; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;" class=3D"">Bob</div><div dir=3D"ltr" =
style=3D"caret-color: rgb(0, 0, 0); font-family: Verdana; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
normal; letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;" class=3D""><br =
class=3D""></div><div dir=3D"ltr" style=3D"caret-color: rgb(0, 0, 0); =
font-family: Verdana; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;" class=3D""><br class=3D"">On May 6, 2021, at =
5:20 PM, Max Heim <<a href=3D"mailto:mvheim@sonic.net"; =
class=3D"">mvheim@sonic.net</a>> wrote:<br class=3D""><br =
class=3D""></div><blockquote type=3D"cite" style=3D"font-family: =
Verdana; font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; =
-webkit-text-stroke-width: 0px; text-decoration: none;" class=3D""><div =
dir=3D"ltr" class=3D"">Theoretically it will form on the underside of =
the plastic=E2=80=A6 which will not be good for your carpet, which =
should be removed.<div class=3D""><br class=3D""></div><div =
class=3D"">Leave the cover off for ventilation, as much as possible =
(obviously you might want to cover the car if you are running the saw or =
the belt sander, or spraying paint). If you could leave the windows =
down, at least a few inches, it would help. Surely mice can=E2=80=99t =
climb up sheer glass=E2=80=A6</div><div class=3D""><br =
class=3D""></div><div class=3D""><br class=3D""><div class=3D""><div =
class=3D"" style=3D"letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: =
break-word; -webkit-nbsp-mode: space; line-break: =
after-white-space;"><div class=3D"" style=3D"letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: =
break-word; -webkit-nbsp-mode: space; line-break: =
after-white-space;"><div class=3D"" style=3D"margin: 0px; font-size: =
13px;">--</div><div class=3D"" style=3D"margin: 0px; font-size: 13px; =
min-height: 16px;">Max Heim</div><div class=3D"" style=3D"margin: 0px; =
font-size: 13px;">'66 MGB</div></div></div></div><div class=3D""><br =
class=3D""><blockquote type=3D"cite" class=3D""><div class=3D"">On May =
6, 2021, at 2:06 PM, Frank Krajewski <<a =
href=3D"mailto:frankk12@verizon.net"; =
class=3D"">frankk12@verizon.net</a>> wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div class=3D"">I =
have received many great suggestions from the list. A simple start will =
be to create a moisture barrier between the concrete floor, which at =
present has a carpet, and the MGB. This will be in the form of a =
tarp or plastic sheet. Excuse my na=C3=AFvet=C3=A9 but what =
prevents moisture from forming on the tarp or plastic?<span =
class=3D"Apple-converted-space"> </span><br class=3D"">Frank =
Krajewski<br class=3D"">1980 MGB LE<br class=3D"">1991 Mazda Miata SE<br =
class=3D"">2003 RAV4<br class=3D"">2021 Subaru Outback Limited<span =
class=3D"Apple-converted-space"> </span><br class=3D""><br =
class=3D"">Sent from my iPad<br =
class=3D"">_______________________________________________<br =
class=3D""><br class=3D""><a href=3D"mailto:Mgs@autox.team.net"; =
class=3D"">Mgs@autox.team.net</a><br class=3D"">Donate:<span =
class=3D"Apple-converted-space"> </span><a =
href=3D"http://www.team.net/donate.html"; =
class=3D"">http://www.team.net/donate.html</a><br class=3D"">Suggested =
annual donation $12.75<br class=3D""><br class=3D"">Archive:<span =
class=3D"Apple-converted-space"> </span><a =
href=3D"http://www.team.net/pipermail/mgs"; =
class=3D"">http://www.team.net/pipermail/mgs</a><span =
class=3D"Apple-converted-space"> </span><a =
href=3D"http://autox.team.net/archive"; =
class=3D"">http://autox.team.net/archive</a><br class=3D""><br =
class=3D"">Unsubscribe:<span =
class=3D"Apple-converted-space"> </span><a =
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br class=3D""><br class=3D""></div></div></blockquote></div><br =
class=3D""></div></div></blockquote><blockquote type=3D"cite" =
style=3D"font-family: Verdana; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; =
text-decoration: none;" class=3D""><div dir=3D"ltr" class=3D""><span =
class=3D"">_______________________________________________</span><br =
class=3D""><span class=3D""></span><br class=3D""><span class=3D""><a =
href=3D"mailto:Mgs@autox.team.net"; =
class=3D"">Mgs@autox.team.net</a></span><br class=3D""><span =
class=3D"">Donate:<span class=3D"Apple-converted-space"> </span><a =
href=3D"http://www.team.net/donate.html"; =
class=3D"">http://www.team.net/donate.html</a></span><br class=3D""><span =
class=3D"">Suggested annual donation $12.75</span><br =
class=3D""><span class=3D""></span><br class=3D""><span =
class=3D"">Archive:<span class=3D"Apple-converted-space"> </span><a =
href=3D"http://www.team.net/pipermail/mgs"; =
class=3D"">http://www.team.net/pipermail/mgs</a><span =
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/span></div></blockquote></div></blockquote></div><br =
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