Is it good to coat in Kansas City, MO this week?
A live 7-day go/no-go calendar for epoxy & resin floors in Kansas City, built from the local forecast against the 5°F-above-dew-point rule. We lead with the signal a weather app misses: overnight condensation risk.
- Dew margin
- -0.6°F
- Overnight dew
- High
- Rain
- 50%
- Window
- —
High condensation risk overnight — surface dips to within -0.6°F of the 69°F dew point (low 69°F, 100% cloud, 5 mph wind). A fresh coat can blush/blister. Stop 4h before dew falls.
- Dew margin
- 2°F
- Overnight dew
- Watch
- Rain
- 77%
- Window
- —
Rain likely in the 24h cure window (77% chance, ~22.4mm) — it can wash out or mar an uncured coat.
- Dew margin
- 8.4°F
- Overnight dew
- Low
- Rain
- 2%
- Window
- 8am–5pm
Clear to coat: temps 56–69°F, RH under 65%, surface stays 8.4°F+ above the dew point, no rain in the cure window.
- Dew margin
- -4°F
- Overnight dew
- High
- Rain
- 1%
- Window
- —
High condensation risk overnight — surface dips to within -4°F of the 56°F dew point (low 50°F, 6% cloud, 3 mph wind). A fresh coat can blush/blister. Stop 4h before dew falls.
- Dew margin
- 0.9°F
- Overnight dew
- High
- Rain
- 2%
- Window
- —
High condensation risk overnight — surface dips to within 0.9°F of the 55°F dew point (low 47°F, 17% cloud, 9 mph wind). A fresh coat can blush/blister. Stop 4h before dew falls.
- Dew margin
- 10.1°F
- Overnight dew
- Low
- Rain
- 0%
- Window
- 8am–5pm
Clear to coat: temps 53–68°F, RH under 74%, surface stays 10.1°F+ above the dew point, no rain in the cure window.
- Dew margin
- 12.7°F
- Overnight dew
- Low
- Rain
- 1%
- Window
- 8am–5pm
Clear to coat: temps 52–72°F, RH under 58%, surface stays 12.7°F+ above the dew point, no rain in the cure window.
- High condensation risk overnight — surface dips to within -0.6°F of the 69°F dew point (low 69°F, 100% cloud, 5 mph wind). A fresh coat can blush/blister. Stop 4h before dew falls.
- Rain likely in the 24h cure window (50% chance, ~2.2mm) — it can wash out or mar an uncured coat.
- High humidity (89%, over the 85% mark) slows drying — keep an eye on the cure window.
Hold off. These are forecast numbers — confirm the surface temperature on-site before you start.
Why these thresholds
Installing within 5°F of the dew point causes amine blush / carbamation — a cloudy, greasy, hazed floor. The slab surface temp, not the air, is what counts.
- • Surface temp must stay 5°F above the dew point through application and cure (ASTM D3276 / ISO 8502-42).
- • Air + surface in the 50–86°F band (low-temp lines to 50°F).
- • Humidity under 85%; ideally under 80%.
- • No rain for 24h after application.
- • We use the forecast ground-surface temperature as a surface-temp proxy — confirm on-site with an IR thermometer.
Free in the beta
Watch this job site 24/7
Get an email the moment overnight dew, rain, or an out-of-range stretch threatens a fresh coat — and a morning digest with the best window ahead. No app to check; we watch the forecast for you.