The short answer: clear the garage down to bare floor — every vehicle, box, shelf, and loose item — and the crew handles everything else, from degreasing and crack repair to the full diamond-grinding prep. Most Denver homeowners overthink prep day, but the honest version is simple: an empty garage is a ready garage. Here's exactly what to clear, what the crew takes care of on-site, and how the whole project typically flows from an empty slab to a finished floor. For the full system overview and pricing, see our epoxy garage floor Denver page.
What You Need to Clear Out Before Install Day
Everything needs to come out of the garage before the crew arrives — vehicles, motorcycles, bikes, lawn equipment, storage shelving, cardboard boxes, tools, and anything sitting directly on the floor. This isn't just for convenience; diamond grinding equipment needs full, unobstructed access to every square foot of the slab, including corners and along walls, to profile the concrete evenly. A single shelving unit left in a corner means that section doesn't get properly ground, which can show up later as a visible seam or adhesion weak point in the finished floor.
Wall-mounted items like pegboards, cabinets, and shelving brackets can generally stay if they're mounted a few inches above where the floor coating will terminate, but anything resting on the floor itself has to go. If you have a floor drain, let your contractor know in advance — drains sometimes need to be taped off or fitted with a temporary cover during grinding and coating.
Simple rule: if it's touching the floor, it needs to move. If you're unsure whether something needs to come out, ask your contractor during the initial walkthrough rather than guessing on install day.
It's also worth thinking through where everything is going to go while the garage is out of commission. A driveway or street parking arrangement for vehicles, a temporary spot in a shed or basement for lawn equipment, and a plan for anything you'd normally store overnight in the garage all take a few minutes to sort out in advance but save a scramble on the morning the crew arrives. Homeowners who've been through the process before generally say the actual clearing takes less time than expected — it's the advance planning of where things go that takes the most thought.
What the Crew Handles: Grinding, Repair, Degreasing
Once the space is cleared, everything else is the crew's job. A typical prep sequence looks like this:
- Degreasing: oil, transmission fluid, and other automotive stains are chemically treated and pressure-washed before grinding.
- Diamond grinding: mechanically removes the top layer of concrete, old sealers, and stains, and profiles the surface for mechanical bond.
- Crack repair: hairline and structural cracks are routed out and filled with a semi-rigid filler that flexes with the slab.
- Moisture testing: especially relevant in Denver, where seasonal moisture readings vary — a moisture-tolerant primer is used if levels run borderline.
- Dust containment: professional-grade vacuum shrouds attached to grinding equipment keep dust to a minimum inside the garage and the rest of your home.
None of this requires anything from you beyond having the space cleared — the crew brings all equipment, containment gear, and repair materials. If your slab has more significant damage than routine hairline cracking, our DIY vs professional epoxy garage floor guide covers why heavier repair work is one of the clearest reasons to bring in a professional crew rather than attempting a kit install.
Timeline for a Typical Prep-to-Finish Project
| Stage | What Happens | Typical Duration |
|---|---|---|
| Pre-install | Homeowner clears garage completely | Day before install |
| Day 1 morning | Degrease, diamond grind, crack repair | 3-5 hours |
| Day 1 afternoon | Base coat applied | 2-3 hours |
| Day 2 | Flake broadcast (if selected) and topcoat | Full day |
| Post-install | Cure time before foot/vehicle traffic | 24 hrs / 3-5 days |
Most single-car and two-car garages complete in two to three working days total from first grind to final topcoat. Larger three-car garages or floors needing extensive crack repair can run a day longer. For a full step-by-step breakdown of what happens during each of these stages, our epoxy garage floor installation guide covers the complete process in more depth.
Common Questions About Access and Utilities
Power & Lighting
The crew brings their own equipment power and lighting; your garage outlets aren't needed.
Garage Door Access
The door needs to open and close freely during grinding for dust ventilation and material delivery.
Pets & Kids
Keep pets and children out of the garage during grinding and while coatings cure — fumes and dust are a factor.
Vehicle Parking
Plan alternate parking for 2-3 days since vehicles can't re-enter until the floor is cure-ready.
If your garage shares a wall or ventilation with living space, mention that during your initial quote — most modern epoxy and polyaspartic systems have low odor, but the crew can adjust scheduling or ventilation setup if needed for sensitive households.
Preparing for Weather and Seasonal Timing in Denver
Denver's temperature swings matter more for epoxy installs than in milder climates. Most epoxy and polyaspartic systems cure best in a specific temperature range, generally above 50°F and below 90°F, which means late fall through early spring installs sometimes need supplemental heating in an unheated garage to keep the slab and ambient air within spec during application and cure. If your install is scheduled during a cold snap, ask your contractor whether the garage needs temporary heaters running the day before and during the job — this is a normal, routine accommodation, not a sign of a problem with your project.
Humidity swings around spring runoff season can also affect slab moisture readings, which is part of why the moisture testing step matters more in Denver than it would in a consistently dry climate. None of this changes what you need to do to prep — it's simply useful context for why your contractor might ask about scheduling flexibility around weather.
What Happens If You're Not Fully Prepped by Install Day
If the crew arrives and the garage isn't fully cleared, most contractors will ask you to finish clearing it before work begins, which can push your start time back or, in some cases, require rescheduling the job entirely if the crew has another install scheduled the same day. This is the single most common cause of delayed or rescheduled installs, and it's entirely avoidable with a bit of planning the day before.
A simple way to avoid this: treat "garage empty" as a checklist item the evening before your scheduled install, not the morning of. Walking through the space with a flashlight after dark, when it's easier to spot small items in corners, is a good final check most homeowners find catches things a daytime walkthrough misses.
A Simple Night-Before Prep Checklist
A short, concrete checklist tends to work better than a mental list on a busy week. The evening before your scheduled install, walk the garage and confirm: every vehicle is moved off-site or to the driveway, all boxes and loose storage items are relocated, shelving units and workbenches resting on the floor are removed or relocated, pets and children's outdoor toys are cleared, and any floor drains have been pointed out to your contractor if you haven't already mentioned them during the quote. Take a phone photo of the empty space once you're done — it's a quick way to double-check nothing was missed, and it also gives you a clean "before" shot to compare against your finished floor.
If you're having trouble finding somewhere to put everything temporarily, a garage prep day is also a reasonable moment to finally donate or discard items you've been meaning to get rid of anyway — many homeowners find the forced decluttering is an unplanned bonus of the process, on top of getting a new floor. It's a small silver lining to an otherwise logistical chore, and it means the garage you move back into after the coating cures is genuinely more organized than the one you cleared out of it, not just freshly floored.
Frequently Asked Questions
Yes, all items and vehicles need to be removed before the crew arrives so grinding equipment can access every part of the slab evenly.
Yes, degreasing and crack repair are part of standard diamond-ground prep and don't require anything extra from you beyond clearing the space.
We recommend clearing the space the day before your scheduled install, with a final flashlight walkthrough the evening before to catch anything easy to miss in daylight.
The door needs to open and close freely for dust ventilation and material delivery, but it isn't in continuous use — just accessible when the crew needs it.
Most systems cure best above 50°F, so for winter installs in an unheated garage, your contractor may bring temporary heaters to keep temperatures in range — a routine accommodation in Denver.