TLDR: A professional Penntek polyurea installation on a standard two-car garage takes one full day from crew arrival to cleanup. The sequence is: diamond grinding and surface preparation (1 to 2 hours), crack repair and fill (30 to 60 minutes depending on volume), polyurea base coat application (45 minutes), decorative flake broadcast and collection (30 to 45 minutes), and polyaspartic topcoat (45 minutes). The floor is walkable at the 6-hour mark and ready for vehicle parking the following morning. This article covers the full day sequence, what homeowners need to do before the crew arrives, and what to expect for the days immediately following installation. Schedule your Cascade installation here.
One of the most common questions Cascade hears from homeowners in Kirkland, Bothell, and Sammamish is: what actually happens on installation day? The "one-day floor" claim is accurate but it is worth understanding what that day involves: both for setting expectations and for making sure you are ready when the crew arrives. A poorly prepared homeowner adds time. A well-prepared one sees the crew in and out efficiently with a result that looks exactly like the portfolio.
Homeowner preparation is a simple but mandatory checklist that must be complete before the crew arrives. The garage must be entirely empty: all vehicles, storage items, shelving units, workbenches, and bikes removed. The crew cannot work around stored items, and moving items on installation day adds time the crew did not budget for. If ceiling-mounted storage is present, it typically stays, but anything resting on the floor needs to be out.
Disconnect any floor-level freezers, refrigerators, or utility items drawing power from floor outlets. Sweep or blow out the garage the day before if there is loose debris or leaves: not because it changes the preparation, but because it saves time and confirms the floor condition before the crew's first look.
The crew will call the evening before to confirm arrival time. Most Seattle-area installations start between 7:30 and 9:00 AM. Expect 6 to 8 hours for a standard two-car garage, slightly longer if significant crack repair is needed.
The installation begins with the crew reviewing the slab against the pre-installation assessment. Moisture levels are confirmed. Cracks and damage are identified and documented. Equipment is staged and the work zone is taped at transitions to protect any finished flooring outside the garage.
If anything on the slab differs significantly from what was assessed during the quote visit: new cracks, discovered oil contamination, or a previously unidentified moisture issue: the lead technician discusses it with the homeowner before work begins. There are no mid-job surprises that were not communicated first. For a detailed explanation of what substrate assessment involves, see our guide to floor assessment and coating readiness.
Diamond grinding is the most important step in the entire installation. The grinder opens the concrete surface to create genuine porosity for the chemical bond.
This is the step that most determines how long the coating performs. For more on why grinding vs. acid etching matters so much, see the DIY vs. professional comparison.
Cascade uses professional diamond grinding equipment with dust extraction. The garage does not fill with concrete dust during this step. The grinding passes cover the entire slab surface including edges and corners. Any oil contamination is addressed with degreasing treatment during or after grinding.
After grinding, the crew fills all identified cracks with professional-grade two-component polyurea crack filler. Narrow hairline cracks receive injected low-viscosity filler. Wider cracks are routed, filled, cured, and ground flush. For a step-by-step on what this process involves, see the full crack repair guide.
The certified Penntek polyurea base coat is a two-component system mixed and applied by the technician using professional spray equipment. The base coat is the chemical bond layer: the component that fuses with the prepared concrete surface. It is applied in a continuous, even pass across the full surface. This product is not available at retail and cannot be replicated with consumer equipment. Walk time on the wet base coat is zero: the crew works in systematic passes without stepping on the applied material.
While the base coat is still tacky, the decorative flake chip is broadcast by hand across the full surface. The broadcast density and color pattern were selected during the consultation. The crew then scrapes the floor to remove standing chips, creating a consistent texture. Flake and color options are shown during Cascade's in-home consultation and portfolio review.
The polyaspartic topcoat is the final layer. It seals the flake layer, creates the UV-stable surface finish, and provides the abrasion resistance and non-porous quality that makes the floor easy to clean for decades. The topcoat is applied in a single even pass by the technician. After application, the crew cleans up equipment, removes edge tape, and reviews the finished surface with the homeowner.
The topcoat begins curing immediately. Walk-on time is approximately 6 hours from topcoat application. The homeowner can re-enter the garage in the evening of installation day. Vehicles should stay out for the first 24 hours to allow full cure. After 24 hours, the floor is ready for all normal use: parking, foot traffic, and light storage return.
For the first 72 hours, avoid dragging heavy items across the surface. The floor is fully cured for walking and vehicles at 24 hours, but the full chemical cure completes around the 72-hour mark. Normal cleaning can begin immediately after the 24-hour vehicle-access window.
Sweep or mop with warm water and a mild cleaner. There are no special maintenance steps required and no break-in period beyond the initial 72-hour precaution on heavy dragging. For a comparison of ongoing maintenance requirements across all flooring types, see concrete coatings vs. other flooring options.
Someone should be available at the start and end of the day. The start-of-day walkthrough confirms any last conditions and captures the homeowner's sign-off on the work scope. The end-of-day review walks through the finished surface and covers the 24 to 72-hour instructions. You do not need to be present for the full 6 to 8-hour installation window.
The garage door stays open throughout the installation for ventilation. Penntek polyurea has a low VOC profile compared to solvent-based epoxy systems. EPA guidance on VOCs and indoor air quality is relevant for any homeowner evaluating coating products for enclosed spaces, but ventilation is standard practice during any coating application. The crew manages airflow. If the installation is during cold weather, the door may be partially closed to maintain temperature for proper cure: the technician adjusts as needed for ambient conditions.
Penntek polyurea is not moisture-sensitive during application in the way solvent-based epoxy is. Rain on installation day does not typically cause a reschedule unless there is water actively entering the garage or the slab is wet from a recent rain event. The crew makes the call on-site based on actual conditions. Cascade schedules with Pacific Northwest weather in mind and manages the installation calendar accordingly.
Commercial installations over approximately 2,000 square feet may require two days depending on layout complexity, crack volume, and required preparation scope. Contact Cascade to discuss scheduling for commercial projects. For more on the commercial coating process, see the commercial concrete coating guide.
Post-installation issues: delamination, adhesion failure, or surface defects: are addressed under Cascade's service process and backed by the Penntek manufacturer warranty. Contact Cascade directly with documentation of the issue. Reach out here and the team will assess and schedule the appropriate response.
Cascade Concrete Coatings serves Woodinville, Kirkland, Redmond, Bellevue, Bothell, Sammamish, Seattle, Everett, Edmonds, and the greater Puget Sound region. Schedule your installation today.
