Charlotte, Raleigh, Durham in NC, anyone here can shed light on humidity and rust? - BMW M5 Forum and M6 Forums
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post #1 of 10 Old 17th May 2017, 06:59 AM Thread Starter
gixxer
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Charlotte, Raleigh, Durham in NC, anyone here can shed light on humidity and rust?

Hi,

(sorry for posting this in the non-regional discussion)

Relocating to the Research Triangle Park (RTP) NC region, coming from Boise, Idaho (dryer climate), been researching on the affect of the RTP area's relative humidity and cars rusting.

And whether folks in this area go out of their way to apply say some sort of undercoating to their rides.

I intend to wash (and wax) regularly.

And this part of NC doesn't seem to have much of any salty road conditions. And i believe it's well into inland to have salty air. Nor is this region deep into the mountains.

But it's the moisture's in the air (i've heard the relative humidity can get "brutal" say in August, near ~100% ???) and effects on rust (eg. car just sitting in the garage overnight), that i have little experiences in.

Some folks seem to suggest this region in NC has fairly clean cars (whatever that means), but just thought i would be better prepared with better knowledge.

Anyone living in this region of NC care to share some of their experiences, etc. along this line of concerns?

Incidentally i've seen some cars sold from Florida and they were some of the clean, rust free cars i've seen (exterior wise). Go figure...

Thanks much,
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post #2 of 10 Old 17th May 2017, 05:22 PM
jojo
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Hey there,

I've only lived in Raleigh for the past 6mo so I can't give you a whole lot of history. But I'm from NYC and I can tell you that I RARELY see rust around here. The biggest indicator for me are the license plate bracket bolts. All northeast cars' plate bracket bolts are rusted. Not here in NC.

Hope that helps.
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post #3 of 10 Old 17th May 2017, 07:10 PM
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If you don't drive on the 1-3 days/year when roads are salted due to ice/snow, you'll never see any corrosion even on the aluminum under the car much less "rust" of any sort. No worries here about humidity during the summer causing any issues that I've ever seen other than heat stroke when you want to do something outside in the middle of August. My M5 is pristine underneath and in all the "problem" areas some have with the E39, and it's been here for 14 years in this climate.

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post #4 of 10 Old 18th May 2017, 12:06 AM
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post #5 of 10 Old 18th May 2017, 02:15 AM
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Welcome to the area. We'll have to meet up when you arrive!

No rust issues here. I've seen cars from mid VA and northward with rusty undersides but not from here southward. I've driven most of my cars even on the snowy days and then later rinsed the bottom off and I have no issues at all with rust on any of my cars.

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post #6 of 10 Old 18th May 2017, 05:51 AM
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Welcome to North Carolina!

No rust issues for you to worry about here. Just make sure to rinse off the underside of the car after each of the 1-3 snow/ice storms we get a year and you'll be fine. I've been DD'ing an E46 in NC for over 10 years and have no rust to report.
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post #7 of 10 Old 19th May 2017, 10:50 AM
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I've lived in NC since 1993, been driving to RTP/CLT ever since and used my 2000 M5 since I got it in 2011. Pretty much what everyone else has said here but one addition: sometime around April the Pine pollen in the RTP gets truly dreadful. It's a green powder just a shade thicker than talc that will get into every nook and cranny of your car and will take a long, detailed cleaning to remove. If you don't then it builds up and moisture makes it it dry into an ever more difficult goo to remove.

The RTP area has something that's unique compared to either Charlotte or the Greensboro/Winston Salem areas: really heavy duty pine pollen. When it's pine pollen season in RTP you should A) Not park your car under any trees and B) garage park as much as possible. You can park your car out on a clear April morning and return to a vehicle that looks green and fuzzy at the end of the day. This also comes with a much higher chance of getting pine tar on your horizontal surfaces (hood, roof and trunk lid) that you need to remove ASAP since it hardens into something resembling super glue. Either way, it's a good excuse to spend some time detailing in early May.

When I was covering RTP I'd at least just hose my M5 down when I got home and get the shop vac out on the weekends to get the pine pollen out of the rain gutters and from around any of the rubber seals on the doors, hood and trunk.

My M5 came down from a life in the Northeastern US (last owner in Boston) where salt took its toll but since it's been in NC I haven't seen any significant changes. I'm under the car twice or so a year to check. They do brine the roads here when it looks like ice or snow is going to happen but it's nothing compared to the heavy salting in states like PA, NY, NJ etc. The only rust I've had to deal with is around the gas cap which is arguably a design flaw rather than something attributable to use of salt.

I'll disagree mildly on the comments about humidity. It's all relative and places like Charleston South Carolina, Savannah Georgia or the Orlando Florida area in mid-summer make North Carolina look like Arizona when it comes to humidity.

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post #8 of 10 Old 19th May 2017, 02:14 PM
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Same here, lived in Raleigh since '88. Daily drove the M5 for about 8 years, no rust issues. Earlier this year I cleaned the undercarriage and all was good, no corrosion at all.
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post #9 of 10 Old 19th May 2017, 03:28 PM
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In my limited experience in RTP during "winter", it's usually best not to drive at all - if for no other reason than to avoid the natives, most of whom have zero winter driving abilities.

- Darrell

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post #10 of 10 Old 19th May 2017, 06:28 PM
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I responded to your same thread on m3f. Do you have an m5 in addition to the m3? Welcome to NC. As others have said, no major issues with rust.

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