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Storing rope in heat

Original Post
Ben Everman · · Unknown Hometown · Joined Dec 2018 · Points: 0

I’ve got a new, dry treated rope. I typically keep all my gear in my car, at least during the winter. If my rope bag gets super hot in the car (or wherever the rope is stored) will this damage the integrity of the rope and/or the treatment?

FrankPS · · Atascadero, CA · Joined Nov 2009 · Points: 276

It's probably fine, but why don't you take it in the house after climbing? Summer's not here yet, so store your gear in your house/apt. Plus, it won't get stolen out of your car.

Sam Skovgaard · · Port Angeles, WA · Joined Oct 2017 · Points: 208

If your rope is in heat, keep it stored away safe.  Other single ropes find the scent irresistible, and the next thing you know you'll be taking care of a litter of cordalettes.

Andre Chiquito · · Seneca Rocks, WV · Joined Jun 2019 · Points: 778
Sam Skovgaard wrote: If your rope is in heat, keep it stored away safe.  Other single ropes find the scent irresistible, and the next thing you know you'll be taking care of a litter of cordalettes.

Dammit, you beat me to the joke!

Gunkiemike · · Unknown Hometown · Joined Jul 2009 · Points: 3,687

I'll tell you your rope is fine if you tell me where you park the car at night.

F Loyd · · Kennewick, WA · Joined Mar 2018 · Points: 808

I've climbed here on days of 105°-113° while leaving them in the car and my ropes are fine. The waterproofing is Teflon or similar that I don't think are affected by heat in the range of a hot car.
But I'm a hobby climber not a climbing doctor...

Burnin Bob · · Unknown Hometown · Joined Nov 2016 · Points: 0

I have heard that acids and acid fumes are something that can seriously weaken nylon.  I'd worry more about the car battery's location relative to the rope, especially when the car gets hot and more battery off-gassing might occur or when it is running and the battery is charging and thus off-gassing. Car batteries are often located in the trunk or under the back seat in modern cars. Its in the trunk in my car so I try not to carry ropes/gear in the trunk.  I probably worry too much but I think there is some logic to this.

https://www.thebmc.co.uk/ropes-dont-like-acid

https://www.blackdiamondequipment.com/en_US/qc-lab-acid-harness.html?utm_campaign=qc-lab-acid&utm_medium=email&utm_source=hotwire-06182013

Shelton Hatfield · · Unknown Hometown · Joined Apr 2011 · Points: 650
Sam Skovgaard wrote: If your rope is in heat, keep it stored away safe.  Other single ropes find the scent irresistible, and the next thing you know you'll be taking care of a litter of cordalettes.

Maybe just better if the line if fixed?

Russ B · · Salt Lake City, UT · Joined Jun 2011 · Points: 42

Don't be dumb Where I live there's 2-3 people every month getting their gear stolen, because they don't listen to the sense people are talking when they say to not leave valuables in your car. 

Lena chita · · OH · Joined Mar 2011 · Points: 1,667

Occasional hot-car exposure is not going to do harm to your ropes. Van dwellers leave their ropes in the car, because there is no other place to keep them. You don’t hear of all the accidents that occur to van dwellers due to their ropes being compromised by storage in the car. And your car seat belts are still fine, aren’t they?

But why do it, if you don’t have to? Is it really so hard to bring your gear inside? The shoe rubber is more likely to suffer in a hot car than a rope. 

Marc801 C · · Sandy, Utah · Joined Feb 2014 · Points: 65
Ben Everman wrote: I’ve got a new, dry treated rope. I typically keep all my gear in my car, at least during the winter. If my rope bag gets super hot in the car (or wherever the rope is stored) will this damage the integrity of the rope and/or the treatment?

https://www.mountainproject.com/search?q=Gear%20stolen%20car

Adam W · · TX/Nevada · Joined Dec 2019 · Points: 532

I keep my gear in the house because my garage is typically 105+ degrees in the summer months.  I’ve had tool handles fall apart, etc and the inside of a car gets hotter than the garage.  No idea if it the heat would damage a rope but why risk it

take TAKE · · Mass · Joined Dec 2013 · Points: 191

Reviving this because it kinda answers my question but not clearly. I want to store some ropes in a non climate controlled storage locker in Phoenix AZ from September to April. Thoughts? This includes brand new dry treated ropes. 

Jared E · · CO-based healthcare traveler · Joined Nov 2022 · Points: 356

Hijacking your necro to derail the thread towards shoes (ropes are fine in heat, you can store it in a locker. Id be more worried about rodents):


I live out of my SUV for weeks-months at a time and so my shoes have to be stored in the car. I definitely notice the rubber splitting, which maybe it’s normal wear and tear but maybe y’all have storage tips. Living in the desert right now triple digit temps 

Austin Donisan · · San Mateo, CA · Joined May 2014 · Points: 669

This thread is lacking numbers for my taste. Beal says to not expose ropes to over 80C, and Black Diamond says 70C.

This spec sheet for Nylon 6,6 says that after 20,000 hours (~2 years) at 80C it loses 50% of its strength.

A study in Athens, Georgia in the summer show car air temps (objects in direct sun would be hotter) averaging 70C on sunny days, going up to to 76C, and has this chart. Eyeballing weather data and guesstimating some math gives an air temp around 80-85C parked in the sun during the day in Moab during the summer.

In summary you car can hit the dangerous temps specified by the rope manufactures. But if you trust the datasheets (which maybe don't apply, I'm not a engineer) it would still take a few years of extreme conditions to matter.
Guideline #1: Don't be a jerk.

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