Winterize the rig before the first hard freeze finds it

Last November we talked about drums — storage temperature, what freezing does to B-side resin, why you never put a torch on one. This year, let's talk about everything else, because the first hard freeze does not just go after chemical sitting in the shop. It goes after the rig: the proportioner, the heated hose, the transfer pumps, the generator, and the whole plan for a jobsite that now has snow on it.

The pattern we see every year is the same. The first real cold snap lands on a Tuesday night in November, somebody left the trailer unheated at the job, and Wednesday morning is a lost day — sometimes a lost week — of thawing, flushing, and finding out what cracked. Every bit of it was preventable in October. If you are reading this in mid-November with the rig still on summer rules, this is the week.

What freezes first, and what it costs you

Cold works through a rig in a predictable order, so protect things in that order:

• Water, before anything else. The compressor tank, air lines, and any air dryer freeze first. A slug of ice in the air line takes out gun function and can feed wet air to the pumps. Drain the tank daily, and if you do not run an air dryer, winter is the season to start.
• The gun and the whip end. The last few feet past the heated zone, plus the gun itself, have the least thermal mass and cool fastest between passes and overnight.
• Transfer pumps and drum-top fittings. Material sitting in an unheated stick pump overnight stiffens or freezes right where you need flow at 7 a.m.
• The B-side in the lines and machine. This is the expensive one. Frozen resin in the hose or proportioner means a dead morning at best; a hard freeze can mean damaged pump sections and a hose repair, and hose is not a cheap part. If it reaches the drum, the whole drum can be a write-off — that is set money, not fitting money.

Add up one frozen morning: the crew standing around, the missed slot, the flush material, maybe a hose section. The heater running all night is the cheapest line on that list by a mile.

Overnight heat that actually works

The goal is simple: the wet side of the rig never sees freezing, ever, from November to April. Ways crews get there:

1. Heat the box, not just the machine. A thermostat-controlled electric heater in a reasonably tight, insulated trailer is the standard answer. Size it for the coldest night you expect, not the average one, and set the thermostat comfortably above freezing so a door left cracked does not sink you.
2. Two sources beat one. A single heater on a single cord is a single point of failure. A backup heater, or heater plus a small circulating fan to kill cold corners, has saved a lot of Wednesday mornings.
3. Insulated boxes for the small stuff. Guns, whips, and spare parts can overnight in an insulated tote inside the heated space — or come inside with you. Plenty of sprayers bring the gun into the motel room in January, and they are the ones spraying at 8 a.m.
4. Block heater on the generator or truck if it lives outside. A diesel that will not light at 10 above is the same lost morning as a frozen hose.
5. An alarm, because heaters fail. A cheap remote thermometer that pages your phone when the trailer drops below your set point turns a catastrophe into a drive back to the job.

Recirculate and condition material in the morning before you spray. Warm air in the box overnight keeps things safe; it does not mean the material is at spray temperature at the gun.

Drums in transit and at the job

Keep transit time in the cold short and planned. A drum that left the warehouse warm holds heat for a while in an insulated space, but a long open-trailer ride in a 15-degree wind strips it fast. Load last, tarp or blanket the drums, and go straight to the job. On multi-day jobs, the drums overnight in the heated box with the machine — never in the truck bed, never on the frozen slab. Remember the storage window: roughly 60 to 80 degrees is where you want chemical living, and B-side that freezes is ruined. And it bears repeating once a year forever: no torches, no open flame on a drum, no matter how far behind you are.

Generator and power planning

Winter jobsites are a power problem before they are a spraying problem.

• Cold-start prep now: winter-grade oil per the engine manual, fresh filters, treated fuel, and a battery tender if it sits between jobs. Run it weekly under load rather than letting it sit a month.
• Fuel math for overnight heat. If the trailer heater runs off the generator all night, figure that fuel into the job. Better: ask the GC or homeowner for a temporary power drop for the heaters and save the generator for spray days. Ask at the walkthrough, not at 4 p.m. Friday.
• Cords rated for the load and the cold, off the ground and out of the melt water.

Hose and jobsite logistics in snow

Dragging 200 feet of heated hose through a foot of snow is its own trade. Shovel the hose path first — five minutes of shoveling beats an hour of fighting frozen, snow-packed hose loops. Keep the hose off snow and standing melt where you can, on planks or stands, and coil it back into the heated box at the end of the day instead of leaving it out to soak and freeze into a shape you will fight tomorrow. Plan parking so the rig sits close to the door you are actually using; every extra 50 feet of hose outside the envelope is heat you are losing and weight your crew is dragging through drifts.

The winter rule for the whole rig: nothing wet, nothing chemical, and nothing with a pump in it ever spends a night below freezing. Build the setup so that stays true even when a heater dies or a cord gets kicked.

Material without the cold-chain worry

Getting drums to you warm is our end of the deal — heated freight runs November through March, so material leaves Saratoga Springs conditioned instead of arriving as a thawing project. Order against the forecast, not the calendar, and the rig checklist above covers the rest.

Heaters, generators, and fuel all carry their own hazards — follow the manufacturer's instructions and keep combustion equipment ventilated and away from the chemical.