I have to install new garage doors, but I have no real information on this
subject. Can somebody tell me how I would install insulated garage doors to
minimize air leakage? As far as I can see, the installations are so bad
that there is no point in paying for insulation.
Here in New England garages are considered "outside". There is
insulation around the house, but it does not include the garage. You
don't really want to pay for heat in a garage. Also, I've heard that
allowing snow to melt off your car releases the road salt in it and that
eats away your frame and body. It is probably good to allow a bit of
air circulation to carry out any moisture in the air, not to mention gas
fumes. Finally, minimizing air leakage is hard to do because you open
the garage doors regularly.
Just my opinion. No facts to back it up.
There is always going to be air leakage around the door. It is the nature
of the beast. You must have the gaps for the door to properly operate.
Insulation makes them much quieter to operate and in severe climates most
likely keeps the frost off the door and helps with the overall garage temp.
In 10 years in this house we have only had a few days where the frost formed
on the door and the room over the garage was uncomfortable. But this is a
pretty moderate climate in the winter (Central KY). If I were farther north
I would probably go insulated.
Insulation still helps and keeps the garage quieter. Check out Wayne Dalton
garage doors and their IDrive opener for something different though the
weatherstripping is typical. Their springs are fully enclosed and the
Idrive opener fits above the door instead of having a rail of its own.
Yours is a typical misunderstanding.
Garages are cost-effective because they control humidity, not temperature.
The real enemy to your car is a condensing atmosphere, which a garage
mostly eliminates, even if unheated and even if uninsulated. Ordinary jamb
seals and panel seals work fine to eliminate infiltration of damp outside
The amortized cost of a garage is less than the amortized cost of corrosion
to your ungaraged-vs-garaged car, for typical cases of "garage" and "car".
So it typically *costs* you money *not* to have a garage.
While you generally will save on insurance and maybe increase resale
value and may protect the paint from sun damage with a garage; in the snow
belt, you will generally cause more corrosion damage with a garage. Keeping
the car below the freeze point will keep the salt and water inactive.
Putting it in a garage, which will generally be warmer, will warm it above
the freeze point and corrosion will start.
An unheated garage will not be thawed with outside freezing more than a few
days per year, for one season. The differential is a few degrees and the
outside ambient must be within that narrow range. Depends on the local
climate how often this is the case.
But a garage *will* avoid a condensing atmosphere, for many, many days per
year, all year long.
The "freezing avoids corrosion" thesis also is questionable. Condensing vs
non-condensing has to be many times more effective than freezing vs thawed,
as regards not promoting corrosion.
This really depends on a number of factors. However you need to
consider that the car when put back into the garage is going to contain a
lot of heat that will warm the garage. In my experience that very often
brings it above freezing.
I disagree here as well, although again that may be dependent on the
local conditions. When a car is driven into a garage wet, the garage tends
to hold in the moisture for an extended period so often even on a nice warm
dry day the inside of a garage is still damp as the dry air can not remove
Again however I would caution anyone from reading too much into this
part of the issue. I don't believe the difference between garage or not
garage is a major corrosion issue with cars. When it is a noticeable
factor, I believe it may go either way. There are just too many individual
differences to draw any certain conclusions.
Come on. We're talking about outdoors, soggy wet with dew nearly every
night, vs a garage, perhaps more or less humid, but rarely condensing.
Park your car outside, it gets wet through-and-through by condensing
vapor intrusion nearly every night. That's murder for corrosion.
I've lived with and without garages for a while. No doubt in my mind of
the value of garaging.
In New England, garages speed corrosion. Roads get salted duriong the winter,
and cars end up with a salt/wet sand/leaves mixture lodged in every crevice.
Chemical reactions are accelerated by warmer temps. That said, corrosion on
modern cars is far less of a problem than it used to be.
I always wanted to believe that, before I could afford a garage. It
comforts you when you're out on the street scraping off snow and ice,
despite the fact that as corrosion goes, drier (garage) beats cooler
Correct, if by "science" you mean credulous endorsement of popular
falsehoods. Rain falls in teardrop shapes, electrons orbit in circles,
centrifugal forces keep your bicycle balanced, humidity is relative, and
leaving your car outdoors is good for it. Or so sez the guy who got his
"science" from a public school.
If by "science" you mean critical thinking applied to actual observations
with mathematical analysis, I haven't seen any from you, so I can't say
whether I agree with it or not.
Salt corrosion is largely an aqueous phenomenon. It's plenty hot and salty
in the deserts of the southwest US, but that is exactly where the airline
industry wisely parks its mothballed aircraft, to minimize corrosion.
Because it is warm and DRY.
"Thermodynamics proposes, kinetics disposes." [Uncle Al]
Which reactions? Some are, some aren't.
How much higher or lower in temp? One percent warmer in an unheated
garage? You think that matters?
Aqueous kinetics have more to do with corrosion rates than temperature, and
the differential exposure is overwhelming.
If you leave your car inside the garage for the entire winter and never take it
outside, it is better for the car.
However, most people want to be able to USE their car, which means it keeps
getting rewetted and salted with fresh stuff. That means that the relative
dryness of the garage means almost nothing, and the warmer temps accelerate
corrosion. The car rarely gets the chance to dry out completely. It just rusts
faster due to the higher temps.
Keep drinking that WD-40 you say is a health drink. It will keep your insides
protected from corrosion.
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