Late-fall installs are one of my favorite jobs. November into early December, a homeowner gets their garage floor locked in right before the salt trucks start running. The temperatures are low but the Valence system handles it, and you head into winter with a coated floor instead of a slab that's about to take a beating. The catch is that late-fall prep is different from a September install. Here's what I ask homeowners to do before I show up.
I'm Dave. I run All American Concrete Coating and I cover western Wisconsin and the east Twin Cities metro from my shop in River Falls.
Can you really coat a garage floor in November or December?
Yes. The polyaspartic topcoat in the Covalent Flake System applies down to 30°F. Old-school epoxy maxes out at a 50°F minimum, which is a big reason I moved away from it. TerraMend, the crack and pit repair compound I use for surface prep, cures from -20°F to 130°F, so I can fix winter damage in the cold with no problem.
What changes in late fall isn't whether the chemistry works. It's whether the garage environment is stable enough to let it work. That's on both of us.
What should I do to my garage before a late-fall install?
Here is the checklist I send every homeowner for a November or December install:
- Empty the garage completely. Shelves, bikes, the lawn mower, the deep freezer, the snowblower. Yes, even the snowblower. I'll let you roll it back in the next day, but I need the slab.
- Confirm you have a heat source. If the garage is unheated and ambient temps are in the 20s or 30s, I may bring portable propane heat. If you have in-slab heat, a gas heater, or even a big electric unit, run it for 24 to 48 hours before I arrive so the slab itself is warm, not just the air.
- Weather-seal the door. Check the bottom gasket on the overhead door. A torn seal means cold air blows across my fresh basecoat all night. A five-dollar bottom seal fixes it.
- Plow or shovel a path to the door. I roll in heavy grinders and carts. I do not need to play pack mule through a foot of snow.
- Clear the apron of ice. The concrete pad in front of the door needs to be clear. I'll be moving between inside and outside all day.
- Don't use ice melt on the slab the week before. Chloride residue can throw off adhesion. If you've been dumping salt at the door, mention it to me on the phone.
What temperature should the garage be for the install?
My target is a slab surface temperature between 40°F and 50°F, with the air matching or slightly warmer. That range lets the polyurea basecoat lay down clean, gives the polyaspartic topcoat a predictable flash, and avoids the condensation problems that show up when warm humid air hits a cold slab.
If you have a well-insulated attached garage that holds 45°F naturally, we're good to go with minimal extra heat. If it's a detached pole-barn-style garage, plan on running heat the day before and through install day. I can bring the heat, but your time and setup save me hours.
How long does curing take in cool weather?
Longer than summer. Not dramatically longer, but worth knowing.
- Walk on it: same day to next morning.
- Light foot traffic and tools back in: 24 hours.
- Park on it: 48 to 72 hours in cold weather. I would rather have you wait than pick up a tire print.
If I can keep the garage at 50°F for 48 hours after the topcoat goes down, the floor is fully ready for a Wisconsin winter by the end of that window. I'll walk you through exactly how to hold temps before I leave.
What about moisture in late fall?
Late fall is actually one of the most stable moisture seasons in Wisconsin concrete. Summer humidity has backed off, the ground is not yet saturated with spring melt, and slabs usually read well under the 3 pounds per 1,000 square feet per 24 hours threshold I work to. I still test, but I rarely get pushed back a week for moisture in November the way I sometimes do in April.
November concrete is usually drier than June concrete. The catch is cold, not wet. And cold I can work with.
What does Dave bring to a late-fall install?
Grinders with HEPA vacs for prep, TerraMend for crack and pit repair, the Valence polyurea basecoat, flake broadcast in whatever color we settled on, and polyaspartic topcoat. If temps need supplementing I bring propane salamander heat. For a closer look at the prep side of the job, see surface prep and repair.
Should I just wait until spring?
Honest answer: it depends on your slab. If your concrete is already spalling and pop-outs are spreading, every winter makes it worse. I would rather coat you in November than watch you fight another salt season with bare concrete. If your slab is solid and the timing is tight, spring is a good backup window. The cold climate post gets into why the product handles Wisconsin temperature cycles, and the month-by-month guide helps you pick your window.
How do I keep heat in the garage for 48 hours after install?
This is the part of a late-fall install that's on the homeowner, and it's the thing I walk through before I pack up and leave. A few options that work:
- Gas heater on a thermostat. Set it to 50°F and let it run. Cheap and reliable.
- Electric space heater with a thermostat. Fine for smaller two-car garages. Watch your breaker.
- Propane salamander I leave with you. On some jobs I'll loan heat for the first 24 hours if you don't have a permanent solution.
- In-slab heat if you have it. This is the easiest scenario. Just don't crank it, 50°F to 55°F is the target, not 70°F.
What I ask homeowners to avoid: opening the overhead door for any real length of time during that 48-hour window. Quick trips in and out are fine. Leaving it open for half an hour to unload groceries undoes the work of the heater.
What if I have a detached garage with no heat?
I'll bring portable propane heat. We warm the slab the day before if possible, install on a stable day, and leave heat running through the cure window. I've done plenty of these. The key is planning ahead so I can bring enough fuel and the right heater size for your square footage. For detached garages I also check the overhead door seal and any wall gaps, because holding heat in a leaky building eats through propane fast. Sometimes a quick weatherstrip fix before install day saves you fuel and gets your slab to temperature cleaner.
Late fall is a real option. Get me on the phone early enough and we'll make it work.
Get a free quote or call Dave at (715) 307-8302.