how cold is too cold for a recoat on flat roof ? - Contractor Talk - Professional Construction and Remodeling Forum

odellconstruct · 01-02-2009, 06:10 PM

got a call from a repeat customer that wants 2 of his flat roofs recoated , the temps and snow here doesnt make it easy .. im thinking maybe march ? i hate the fact that i have to sit on it for awhile .. any opinions ..

MALCO.New.York · 01-02-2009, 06:46 PM

Quote:

Originally Posted by odellconstruct

got a call from a repeat customer that wants 2 of his flat roofs recoated , the temps and snow here doesnt make it easy .. im thinking maybe march ? i hate the fact that i have to sit on it for awhile .. any opinions ..

Coat??? As in Aluminum Coat?

"Do not apply when air or surface temperature is below
4.5°C (40°F) or when rain is expected within 6 hours."

odellconstruct · 01-02-2009, 07:02 PM

i knew that ,, was wondering maybe if there were any type that could be used in cold weather .. yes aluminum brite i was figuring i guess when it gets warmer out it will get done

Renegade · 01-03-2009, 11:52 PM

40 degrees and rising is always a good rule of thumb for any fluid application in roofing.

buildpinnacle · 01-04-2009, 12:53 PM

Quote:

Originally Posted by Renegade

40 degrees and rising is always a good rule of thumb for any fluid application in roofing.

Took the words right out of my mouth. We don't do anything involving roofing unless we have both 40 degrees AND rising.

You will find this in the specifications for the product you are applying, though.

odellconstruct · 01-04-2009, 01:07 PM

yeah i looked at em all and was wondering if there was any that can be applied below 40 .. here in ny it hasnt gotten over 35 in the last few days and at that i would need prob a good couple days to make sure it dries completely .. im prob gonna have to wait til maybe march or unless we have some days that hit 50 and 60 deg ... where is that global warming when u need it lol ..

if i was to apply it at current temps and have no snow/rain in the week or so wouldnt it eventualy dry .. if had days where its warm enough .. plus i plan on using my torch to evaporate any moisture on the roof that should speed up drying time ? iwould love to get it done instead of waiting if i can .. the longer i wait they may just say forget it ..

Walason · 01-07-2009, 09:33 AM

Is your coating solvent based or water/latex based ? I am in Upstate, NY. We are an exclusive coatings contractor. We utilize solvent based coatings, and prefer a butyl product. We buy direct from the manufacturer. We can apply if membrane or metal flat roof is completely dry. Temperature depends on employees willingness to work. We have applied coatings with success in temps as low as 14 degrees. There is risk though, is even though as soon as the coating comes into contact with the roof surface it is water tight, if the is any moisture on the surface, it could blister at some time. It will cure over time. As long as foot traffic or significant roof movement is not happening before the cure, we would apply based on the above mentioned. We also apply at a significantly thicker rate in these applications. If you don't have a lot of experience in this, it might be better (for liability purposes) to wait until weather warms up. We evaluate each potential installation/application on a case by case basis depending on several factors, some listed here. Hope this helps you !

MALCO.New.York · 01-07-2009, 09:53 AM

^^^^Sounds "Smart"!^^^^

(Compliment)

AaronB. · 01-07-2009, 11:43 AM

Quote:

Originally Posted by Renegade

40 degrees and rising is always a good rule of thumb for any fluid application in roofing.

Thats not true.

We use polyurea fluid applied instant set roofing membrane systems that can be successfully applied to well below zero. The gel time will be a bit slower in colder temperatures....say four minutes instead of 30 seconds, but it will still happen.

PLEASE STOP SUPPLYING THE WWW WITH BAD INFO.

Grumpy · 01-07-2009, 12:15 PM

40 degrees is ideal. Some manufacturers allow you to go lower with various additives. Infact solvent based you can do lower with no additives, however more expensive.

I know you said silvercoat, so there must not be an emergency, just a maintenance coating. However if you were doing elastomeric I'd refer yout o Adurel's solvent based SEBS for cold weather applications.

However the connundrum is if you wash the roof and it's below freezing the water will freeze and you can't coat ice

Aaron I don't really consider the polyurea a fluid. Sure it is a liquid sprayed out and cured, but it's a chemical reaction from combining the A and B that causes the cure, not an air dry like most other fluids. I know you and Mr. Hay would disagree with me however.

odellconstruct · 01-07-2009, 01:12 PM

Quote:

Originally Posted by Grumpy

40 degrees is ideal. Some manufacturers allow you to go lower with various additives. Infact solvent based you can do lower with no additives, however more expensive.

I know you said silvercoat, so there must not be an emergency, just a maintenance coating. However if you were doing elastomeric I'd refer yout o Adurel's solvent based SEBS for cold weather applications.

However the connundrum is if you wash the roof and it's below freezing the water will freeze and you can't coat ice

Aaron I don't really consider the polyurea a fluid. Sure it is a liquid sprayed out and cured, but it's a chemical reaction from combining the A and B that causes the cure, not an air dry like most other fluids. I know you and Mr. Hay would disagree with me however.

yes it is a recoat starting to wear off . so its not gonna take much plus the issue is the weather getting the time frame to do it just need a day thats decent to do it that im available to .

odellconstruct · 01-07-2009, 01:14 PM

Quote:

Originally Posted by Walason

Is your coating solvent based or water/latex based ? I am in Upstate, NY. We are an exclusive coatings contractor. We utilize solvent based coatings, and prefer a butyl product. We buy direct from the manufacturer. We can apply if membrane or metal flat roof is completely dry. Temperature depends on employees willingness to work. We have applied coatings with success in temps as low as 14 degrees. There is risk though, is even though as soon as the coating comes into contact with the roof surface it is water tight, if the is any moisture on the surface, it could blister at some time. It will cure over time. As long as foot traffic or significant roof movement is not happening before the cure, we would apply based on the above mentioned. We also apply at a significantly thicker rate in these applications. If you don't have a lot of experience in this, it might be better (for liability purposes) to wait until weather warms up. We evaluate each potential installation/application on a case by case basis depending on several factors, some listed here. Hope this helps you !

thanks ill look into the solvent based sound like i wont be waiting til march

AaronB. · 01-07-2009, 09:24 PM

Well, I dont know what the criteria is for being a fluid applied, aside from being a fluid??????