How Cold Is Too Cold For A Recoat On Flat Roof ?

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 ..

MALCO.New.York

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."

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odellconstruct

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

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

buildpinnacle

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.

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odellconstruct

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

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

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

(Compliment)

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AaronB.

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.

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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 roof coating. However if you were doing elastomeric I'd refer you to solvent based SEBS or Urethanes 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

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

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

AaronB.

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

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Grumpy

Sure sure sure, you're absolutely right and we are arguing symantics. To me the polyurea in my mind is more like a foam SPF, because of it's plural component method of application. I know it's not like SPF, but it's installed similiar. I just can't get my mind around calling it a "fluid" even though you're buying 55 gallon drums of liquid.

beelly

Hi,
The best way to extend the life of the roof is to apply a roof coating to the surface, these come in a few different types. There are asphalt based and polymer or elastomeric based coatings available today. Both can extend the life of your roof but the elastomeric roof coatings will give you a better quality roof surface.
Thanks.

Air Ventilator || Roof Ventilator

Pro roof system

when there is snow on the roof... then you have to shovel it!

Grumpy

What about the little bits and flecks of snow you can't get with the shovel? What then? You can;t cover a wet surface and snow is wet afterall.

Coolrestoration

Yes there is a coating in the us called kevlar ??? It is made by final flat roof and can be applied in wet and also freezing temps.even cures np.go to the website.it's not cheap but small price to pay for a little extra work in the winter

Willy is

It is the HO's problem now. The roof has probably been bad for years. You don't want to do a possibly threshold repair and make the problem yours by applying product outside of the recommended ranges. Spring is right around the corner. Tarps or plastic may be a temporary cure to get you to warmer weather.

Without regard to temperature, the optimal repair would entail proper cleaning and preparation of the roof. If you can't get it prepped the way you want it you can't do the work. I have some trouble visualizing a completely dry roof without frost in below freezing temps. I understand that it may be possible, but would it be a better repair and done for less money if it were done in a few weeks in a warmer stretch of weather? After all, it is possible to pour concrete when it is below zero, that doesn't mean it is the same cost or can be done with the same preparation.

willy

flatroofing

Just recently did a small repair at 19 degrees.Takes alitte time to do the repair.Used a propane torch, sucked water from leak for 5 min.Used solvent based coating.Did a few rusty screws.Happy tenants, dri building.Dont do this often.Hope this helps.