Outdoor painting in the cold?

[3PedalMINI]

Well, it looks like I ran out of time on my outdoor project. Its Hardie Plank siding pre-primed. My plan was to prime it with Loxon to be on the safe side (some of the printings on the back showed DOM in June so the pre-prime is already at EOL. However it looks like it can only be applied at temperatures at or above 52 degrees. For the foreseeable future it looks like were in the mid to high 40s so its no good to prime (any primer it seems like) And given how this weather has been I doubt we'll see 50s for a while, especially on the weekends or on days I could potentially take off. And if it does it 50's it will be raining. [blink]

Im planning on using exterior Duration which claims it is a primer/paint (I never trust that) but it can be applied down to 37 degrees. Everything ive read says it should be primed regardless with Loxon to prevent "fuzzing" especially if the pre-primed boards have expired. Could I use the first coat of Duration as the "primer"? I have spent way to much time and money on this shed and I dont want to cut corners now.

What should I do? Thanks!

 

[Peter_C]

Tarp it and heat it before painting. Gonna need a powerful heater though.

 

[bertv]

There is a Dutch company that makes and sells heated paint cans. That tells you something about our climate and inventiveness.

 

[Pnw painter]

I’ve painted at least 10 houses with new hardie siding and I didn’t prime any of them. Pretty much all the painting companies in my area skip priming hardie. I’ve used Duration on several occasions without priming and its held up exceptionally well. I’ve also had excellent results with BM Regal Select High Build.

A good rule of thumb for low temp painting is to start around 10:00 and quit around 3:00. Another issue you’ll probably run into is surfactant leeching. Low temps cause soaps in the paint to rise to the surface while its curing. It’ll make the sheen look splotchy. If this happens you can wipe off the surfactants with warm water and it doesn’t effect the long term integrity of the paint.

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[AlexThePalex]

There is a Dutch company that makes and sells heated paint cans. That tells you something about our climate and inventiveness.

I don't understand this, once you apply the paint it's cold in a minute and you still have the problem of bad drying.

Sikkens now has a paint that they say can be applied  to 32F/0C but I've tried it last winter and really dislike it, it's still not optimal.

40F/5C degrees is just too cold to paint, I'd make sure bare wood is all primed so you don't get any rot during the winter, and then wait for better temperatures in spring to finish it.