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Sourdough · Fix it
Dense sourdough loaf, no oven spring
Last updated 23 August 2026
A dense loaf with little oven spring almost always means under-fermentation, weak gluten development, or a starter that wasn't active enough at mix time. Check your starter's strength first, then look at bulk time relative to your kitchen temperature.
Diagnose it
Which one matches your dough
| Symptom | Likely cause | Fix | Prevention |
|---|---|---|---|
| Tight, uniform crumb throughout | Under-fermented, not enough gas produced | Extend bulk time and confirm starter activity | Use the Fermentation Calculator for your kitchen |
| Dense at the bottom, more open on top | Weak gluten couldn't support the gas evenly | Build more strength with stretch and folds | Add 3 to 4 sets of folds during bulk |
| No spring at all in the oven | Starter was weak or dough was overproofed before baking | Check starter strength, adjust proof time | Use the Starter Calculator to confirm your starter is strong enough |
| Spring happened but crumb is still dense | Under-developed gluten despite decent oven spring | Increase kneading or folding next batch | Build strength gradually through the bulk ferment |
Do this now
Diagnose and fix a dense, flat loaf
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1
Step 1
Cut a slice and look at the crumb. Tight and close throughout usually points to under-fermentation rather than a shaping problem.
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2
Step 2
Check your starter was properly active and near peak when you mixed the dough.
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3
Step 3
Review your bulk ferment time against your actual kitchen temperature, not a fixed recipe time.
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4
Step 4
Check gluten development too. If the dough felt slack rather than strong before shaping, more kneading or stretch and folds may be needed next time.
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5
Step 5
Use our full crumb diagnosis guide to match your specific crumb pattern against seven distinct causes, since dense crumb has several different roots.
Stop it happening again
Fix the cause, not just the bake
Dense crumb has several possible causes, and getting a precise diagnosis matters more than guessing. Our full crumb diagnosis guide walks through seven distinct crumb states with the cause and fix for each, and Loaf Doctor can ask a few quick questions to point you at the most likely one for your bake.
Common questions
FAQ
Why is my sourdough loaf dense with no oven spring?
A dense loaf with little oven spring almost always means under-fermentation, weak gluten development, or a starter that wasn't active enough at mix time.
How do I know if my starter is strong enough for sourdough?
A strong starter should reliably double within 4 to 8 hours of feeding and smell pleasantly tangy, not overly sour or flat. If it's sluggish, it likely needs more consistent feeding before it's ready to bake with.
Is dense crumb always an under-fermentation problem?
No. It can also come from weak gluten development or a mismatch between hydration and flour strength. Our full crumb diagnosis guide covers seven distinct causes to help narrow it down.
Keep reading
Other pizza and sourdough fixes
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