Preventing Overproofed Sourdough at 80 Degrees (80°F Summer Kitchen) with 5% Starter
Calibrated 8.5–11.3 hr fermentation window at 80°F (26.7°C) with 5% levain, targeting +31.1% volume (+24.3% conical height).
Running bulk fermentation at 80°F (26.7°C) and 5% inoculation (25g starter) yields a 8.5–11.3 hour window before dormancy below 45.9°F. Lock in oven spring at +31.1% true volumetric expansion (+24.3% vertical height rise in a sloped bowl at 4.97 cm) instead of risking a +40.2% volume explosion.
- Estimated Bulk Time
- 8.5–11.3 hrsAt 80°F (26.7°C) with 5% starter (Q10=1.46x)
- Target Aliquot Volume Rise
- +31.1%Capped volumetric cutoff (<45.9°F dormancy)
- Sloped Bowl Height Target
- 4.97 cm+24.3% vertical climb from 4.0 cm
- 2x Height Trap Warning
- +40.2% VolCoil fold every 29m (LAB 6.2:1)
Bulk Fermentation Time & Bowl Geometry Matrix Around 80°F (26.7°C) & 5% Starter
5-point neighborhood comparison around 80°F (26.7°C) and 5% starter (25g/500g flour), showing window hours, conical height rise %, straight-wall volume rise %, and 29-min coil fold intervals.
| Temp & Levain Seed (Around 80°F / 5%) | Fermentation Window | 9" Conical Height Rise | Straight-Wall Volume Rise | Coil Fold Cadence |
|---|---|---|---|---|
| 78°F (25.6°C) @ 3% (15g) Cooler / Lower Seed | 14.5–18.6 hrs (870–1116m) | +32% height (4.0 → 5.28 cm) | +41.5% vol (2x trap: +54.8%) | Every 32 min (Row 1) |
| 80°F (26.7°C) @ 3% (15g) Baseline Temp / Lower Seed | 12.5–16.6 hrs (750–996m) | +24.3% height (4.0 → 4.97 cm) | +31.1% vol (2x trap: +40.2%) | Every 30 min (Row 2) |
| 80°F (26.7°C) @ 5% (25g) [Current Target] | 8.5–11.3 hrs (510–678m) | +24.3% height (4.0 → 4.97 cm) | +31.1% vol (2x trap: +40.2%) | Every 29 min (Row 3) |
| 80°F (26.7°C) @ 8% (40g) Baseline Temp / Higher Seed | 6–8 hrs (360–480m) | +24.2% height (4.0 → 4.97 cm) | +30.9% vol (2x trap: +40%) | Every 28 min (Row 4) |
| 82°F (27.8°C) @ 8% (40g) Warmer / Higher Seed | 5–7 hrs (300–420m) | +20.3% height (4.0 → 4.81 cm) | +25.8% vol (2x trap: +33%) | Every 26 min (Row 5) |
Interactive Bulk Fermentation Temp × Inoculation Calculator
Compare your exact mixing bowl dimensions, flour protein percentage, or discard weight in real time.
Thermal Momentum Warning at 80°F (27°C): Cut Off 5% Starter Bulk at +31.1% Rise
Homofermentative and heterofermentative LAB populations at 80°F (26.7°C) with 5% starter generate a 6.2:1 lactic-to-acetic molar ratio over 8.5–11.3 hours. As pH drops toward 4.2, spacing coil folds at 29-minute intervals preserves glutenin elasticity until the dough hits +31.1% volume (+24.3% height at 4.97 cm).
Biot-number thermal gradients inside an 850g–950g batard mean the outer crust chills to 45.9°F long before the 80°F (26.7°C) center. For a 5% levain formula (Q10=1.46x, 29-min fold spacing), terminating bulk at 8.5–11.3 hrs and 4.97 cm (+24.3% height / +31.1% volume) prevents center-crumb blowout.
Managing a 80°F (26.7°C) / 5% Inoculation Sourdough Schedule
- Levain Inoculation (5% / 25g): Dispersion-mix 25g peaked starter (13g F + 13g W) into 500g flour tempered to 80°F (26.7°C).
- Rheological Coil Folds (29-Min Cadence): Execute damp-hand coil folds every 29 minutes during the first half of the 8.5–11.3 hr window (Q10=1.46x).
- Frustum Height Cutoff (4.97 cm): Track bowl climb from 4.0 cm to 4.97 cm (+24.3% height = +31.1% aliquot volume); never wait for 8.0 cm (+40.2% trap).
- Thermal Arrest (<45.9°F Core): Preshape, bench rest 20 min, stitch into a banneton, and chill at 38°F so core activity halts below 45.9°F.
Frequently Asked Questions for This Bulk Fermentation Temp × Inoculation Spec
At what internal temperature does a 80°F dough stop rising in the fridge?
When transferred from 80°F (26.7°C) to a 38°F refrigerator at +31.1% volume (4.97 cm bowl height), wild yeast budding tapers into dormancy once the core cools below 45.9°F.
How many grams of starter is 5% inoculation for a 500g flour loaf at 80°F?
A 5% inoculation on 500g main flour equals 25g of active 100% hydration starter (13g flour + 13g water), fermenting in 8.5–11.3 hours at 80°F.
How often should I do coil folds at 80°F with 5% starter?
Space your coil folds every 29 minutes during the first half of the 8.5–11.3 hour window at 80°F (26.7°C) so the gluten network holds its +31.1% rise.