Fire Taping In Cold Weather - Drywall - Contractor Talk

Fire Taping In Cold Weather

 
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Old 01-08-2019, 03:36 PM   #1
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Fire Taping In Cold Weather


So I have about 48' of drywall seams that need to be fire taped Thursday before we can frame a garage.

Temps Thursday morning are starting out in the low 20's (Fahrenheit for you Canucks ) and falling into the teens by night.

Can I put the drywall up, put some plastic up, and run a heater under there for a hour and a half or so and use 20 min mud, then start framing in the afternoon? How long does the hot mud need to be kept above freezing?

I was going to use this stuff, https://www.amazon.com/EZ-Taping-Sys...ire+tape&psc=1 but then saw on the label it needs to be a minimum of 50 degrees to be installed...
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Old 01-08-2019, 06:42 PM   #2
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Re: Fire Taping In Cold Weather


One thing to keep in mind is that while hot mud hardens quickly, the full curing process takes much longer. Just how long, I dunno--but I bet it's more than a couple of hours.

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Old 01-08-2019, 07:23 PM   #3
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Re: Fire Taping In Cold Weather


In cold weather during gypsum panel joint finishing, a minimum surface, water, mix and air temperature of 45 °F must be maintained until joints are completely dry. Adequate ventilation shall be provided to carry off excess moisture.


https://www.usg.com/content/dam/USG_...ittal-J17A.pdf


In my experience even 5 minute can take overnight to fully dry, depending on thickness. A thin coat under tape is probably at least 8 hours at 50°
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Old 01-08-2019, 07:27 PM   #4
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Re: Fire Taping In Cold Weather


yup. Water isn't gonna evaporate any faster just because the mud has set.
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Old 01-08-2019, 08:43 PM   #5
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Re: Fire Taping In Cold Weather


If the tape just needs to be stuck onto a 50F surface, I'd probably try a seaming iron or a heat gun.
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Old 01-08-2019, 10:34 PM   #6
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Re: Fire Taping In Cold Weather


Thanks guys.

I'm thinking I'll go with the ez tape stuff, tarp the wall, and run the space heater under there for a couple hours while we are framing the garage walls, then stick the tape on, and start setting trusses.


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Old 01-08-2019, 10:39 PM   #7
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Re: Fire Taping In Cold Weather


I'm guessing it wouldn't hurt to store the tape on a warm dashboard, etc.
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Old 01-08-2019, 11:29 PM   #8
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Re: Fire Taping In Cold Weather


Quote:
Originally Posted by MarkJames View Post
I'm guessing it wouldn't hurt to store the tape on a warm dashboard, etc.
Yup, I've got a couple warm boxes in the trailer for the battery chargers, it'll be in one of those.

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Old 01-14-2019, 03:01 PM   #9
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Re: Fire Taping In Cold Weather


Quote:
Originally Posted by Big Johnson View Post
...In my experience even 5 minute can take overnight to fully dry, depending on thickness. A thin coat under tape is probably at least 8 hours at 50°
Whoever came up with those minute ratings must have been a politician-in-training.

They often take multiples of stated time periods. Even in low humidity, proper mix, mid-to-high ambient temps
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Old 01-14-2019, 06:26 PM   #10
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Re: Fire Taping In Cold Weather


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Originally Posted by artinall View Post
Whoever came up with those minute ratings must have been a politician-in-training.

They often take multiples of stated time periods. Even in low humidity, proper mix, mid-to-high ambient temps
It’s the amount of time before they can be top coated. I still wouldn’t top coat anything after only 5 minutes.
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Old 01-17-2019, 10:59 AM   #11
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Re: Fire Taping In Cold Weather


Quote:
Originally Posted by Tinstaafl View Post
One thing to keep in mind is that while hot mud hardens quickly, the full curing process takes much longer. Just how long, I dunno--but I bet it's more than a couple of hours.
Ive seen heavily coated beads with 20 min take days to cure . With proper heat.
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Old 01-17-2019, 06:21 PM   #12
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Re: Fire Taping In Cold Weather


Just to follow up on this, I ended up setting the last truss 1 1/2" away from the house, and once the garage was closed in, tarped off the first 8' and ran the space heater in there for a couple hours, and stuck the ez tape on.
Worked pretty good.

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