How Should a Property Manager Plan Parking Lot Sealcoating and Striping in Oshkosh?
September 9, 2026
A commercial lot in Winnebago County gets five months of working weather, one enormous July, and seven months of plows and brine, so the plan has to be written before the first quote.
Start with the calendar, not the quote
Sealer needs air at 50 degrees F and rising for 24 hours, dry pavement, sun and a full day of cure before traffic. In Oshkosh that makes May through September the dependable window: five months of working season against seven months of frost, salt and thaw. Properties that serve the July influx want surface work finished and cured before it arrives. EAA AirVenture 2025 ran July 17 to 28 and drew about 704,000 people, and lots anywhere near Wittman Regional or along the Highway 41 corridor are full for that stretch.
That leaves two realistic slots for a lot that cannot close: late May through early July, or the second half of August into September, after the crowds and before October's freeze odds. Book in spring; late callers get September, the last dependable month.
Phasing so the business stays open
A lot is sealed in sections, not all at once. Each section is closed, cleaned, crack filled, sealed and given a full day to cure; striping usually follows the next day, sometimes the same evening on a small lot in warm, dry weather. The phase map decides which entrances stay open, where staff park and how deliveries route. After-hours and weekend work is possible and is one of the cost drivers the cost guide describes.
- Split the lot so one entrance and the accessible spaces nearest the door stay open in every phase
- Seal drive aisles overnight or on the lowest-traffic day; seal stall rows during business hours behind cones
- Tie tenant and staff notices to the phase map, with a rain date, since one storm can cost three days
- Stripe each section the day after it is sealed so the next phase can open on schedule
- Do dumpster and loading zones first or last, never mid-phase
ADA striping: the numbers that get checked
Restriping is the moment a lot either meets the 2010 ADA Standards for Accessible Design or visibly does not. The standards set stall counts, dimensions and placement, and line striping and lot layout is scoped to them. The figures a plan should carry:
- Count: 1 accessible space for a lot of 1 to 25 spaces, 2 for 26 to 50, 3 for 51 to 75, 4 for 76 to 100, 5 for 101 to 150, 6 for 151 to 200, 7 for 201 to 300
- Van spaces: at least one of every six accessible spaces must be van accessible
- Width: car spaces 96 inches minimum; van spaces 132 inches minimum, or 96 inches with a 96-inch access aisle
- Access aisle: 60 inches minimum, running the full length of the space, marked to discourage parking, and it may be shared by two spaces
- Surface: slopes no steeper than 1:48 in the space and aisle, which on lakebed clay means checking for settlement before striping
- Sign: bottom of the sign 60 inches minimum above the surface; spaces located on the shortest accessible route to the entrance
Salt, plows and the lot's worst month
Whatever the summer plan, the lot spends the winter under chloride. Winnebago County applied 8.9 tons of salt per lane mile and just over a million gallons of brine on its routes in 2024-25, and every car turning in from Highway 41 or Jackson Street carries some of it onto the lot. Research funded through a U.S. DOT university transportation center found that chloride deicers combined with freeze-thaw cycles debond the asphalt binder from the aggregate, which is why an unsealed lot ravels along its drive aisles first.
Snow management belongs in the plan too. The City of Oshkosh's snow and ice policy prohibits removing snow or ice from a driveway or parking lot onto any public right-of-way, so a lot needs its own pile zone, ideally over pavement already scheduled for parking lot sealcoating next season, not over the new stripes. Piles melt into the base, and on poorly drained Poygan soils with a perched water table within a foot of the surface, that water sits until the frost lets it go.
A maintenance plan, written down
The commercial pitch is not a bigger sealcoat; it is a schedule. The Asphalt PASER manual used for rating local roads gives the trigger points: a surface rated 7 on its 10-point scale gets routine crack sealing, a 5 or 6 gets a sealcoat, a 3 or 4 needs an overlay. A lot inspected each spring and kept in the 7-to-5 band stays on the maintenance side of that line; one that drifts to a 4 is a paving project.
An asphalt maintenance plan puts that on paper: a pavement inventory with areas and condition, a year-by-year schedule, sealing on a two to three year rotation, crack filling every year in the shoulder months, restriping with each seal, and a three to five year horizon so the budget is known before the season opens. Owners with properties in Oshkosh, Neenah and Menasha can run one calendar across all of them.
What to ask for in a written scope
The scope is where a job is won or lost. Ask for parking lot sealcoating and striping in Oshkosh to be quoted with the phase map attached, and check it for these items before signing.
- Square footage per phase, number of coats, and cure time before each phase reopens
- Linear feet of crack filling and the location of any hot mix patches, both done before the sealer
- The accessible stall count, van count and aisle widths, drawn on the plan
- Paint color and stencil list: stall lines, arrows, fire lanes, accessible symbols
- Rain date policy and who calls the weather
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Quick Answers
How often should a parking lot in Oshkosh be sealcoated?
Every two to three years, with crack filling every year in between. The freeze-thaw count, the lakebed clay under the base and the county's salt season all work faster on a lot than on a driveway because the traffic loading is heavier. An annual spring inspection rated on the PASER scale tells you whether the year calls for crack sealing only or a full seal and restripe.
How many accessible parking spaces does my lot need?
Under the 2010 ADA Standards, 1 space for a lot of 1 to 25 total spaces, 2 for 26 to 50, 3 for 51 to 75, 4 for 76 to 100, 5 for 101 to 150, 6 for 151 to 200 and 7 for 201 to 300. At least one in every six accessible spaces must be van accessible, with a 132-inch stall or a 96-inch stall beside a 96-inch access aisle, and all of them on the shortest accessible route to the entrance.
Can a business stay open during parking lot sealcoating?
Yes, if the lot is phased. Each section is closed for cleaning, crack filling, sealing and a full day of cure, then striped, usually the next day, while the rest of the lot stays open. Drive aisles are best done overnight or on the slowest day. Plan around the AirVenture week in late July if the property serves visitors, and keep at least one accessible space open in every phase.