Winery Floor Repair After Harvest: What to Check and When to Fix It

By Pablo Figueroa · November 4, 2026 · 4 min read

A season of crush leaves its marks on a floor. California harvest usually runs from August through October, according to Discover California Wines, so by November the pad, the tank room and the lanes between them have carried a full season of wheels and washdowns. This guide covers how to find damage while you still remember where the trouble was, how to sort the findings, and why the weeks after the last load of fruit are the right time to act.

When is the repair window?

Start planning after the last fruit delivery, then confirm a workable window around fermentation, cleaning and other operations. California harvest usually starts in August, but each winery’s schedule differs. November can offer time for a survey and repair plan; do not postpone an immediate safety hazard until the off-season.

How do you find damage you cannot see?

Have an experienced inspector assess suspected hollow areas. The Federal Highway Administration describes hammer sounding for concrete: strike the surface, listen, and treat a hollow, muted sound as the mark of delamination. Its page is written for bridges and tunnels, so we are borrowing the practice, not quoting a flooring rule. A sound difference on a coated floor can prompt further investigation, but does not by itself establish a coating-bond failure. Have the installer select a suitable evaluation method; striking a finish can damage it.

The page also gives a limit worth keeping in mind. For concrete tunnel linings, FHWA reports that sounding works best in the top 4 to 6 inches and generally misses early-stage or deep delamination. That depth range is not a coating-test criterion. An apparently normal sound does not rule out hidden defects.

How should you organize the survey?

For a professional sounding survey, FHWA describes a grid, sounding and outlining sequence for concrete. Isolate the work area from traffic and use finish-compatible marking methods. Owners can start with a visual map and photographs without striking the coating. Photograph each outline with a tape measure or a labeled strip in the frame, and write down where it is and when you noticed it.

Is every open joint a failure?

No. ASCC Concrete Polishing Council Position Statement #4, which cites ACI 302.1R-15, says filler or sealant separation should be expected when joints are filled early in a slab's drying shrinkage, and that separation does not by itself mean the filler or the installation failed. The note says most shrinkage occurs within the first four years, with the most significant shrinkage in the first year, especially the first 90 days. If your slab is new, record separated filler and have its condition assessed before assigning a cause. Separation can still require maintenance to protect joint edges and safe traffic.

What belongs on the repair list?

We sort findings into three groups. Assess promptly covers hollow patches; isolate lifted edges and anything that catches a wheel until the hazard can be addressed. The repair method and urgency depend on an inspection, not sound alone. Fix this winter covers worn areas that still hold and joints that need attention before the next season. Watch covers marks you photograph today and check again before August.

What does DTI do after you have a list?

Floor repair and overlays are on DTI's services list, and a free floor-condition assessment comes before any product talk. Bring the photos and the grid notes and we will tell you what the list means.

Finished crush and not sure what your floor looks like? Request a free floor-condition assessment or call (209) 879-9674.

For more context, explore DTI’s winery flooring services, our winery floor assessment guide and floor walkthrough checklist. Follow DTI’s LinkedIn company page for floor-care updates and The Floor Front.

Image: AI-generated post-harvest winery floor illustration, not a documented DTI project.