Tight crumb with large holes- overproofed or underproofed?

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Hello,

I made a small loaf yesterday with a little under 25% whole spelt flour. It didn't rise very much at all, and it's dense with a lot of really large holes. I usually make loaves with entirely whole rye and whole spelt (except for my starter), so I was surprised that this mostly white flour loaf turned out this way. I did use a different brand of spelt flour than usual, but I doubt that's the issue.

 

I still have a hard time determining when a loaf has risen properly. It lrt it bulk ferment for 8 hours in an unheated house, and the final rise was only 1.5 hours. I did the poke test both times, and the indent remained in place, so perhaps it was overproofed? It just looked so small I couldn't imagine it was overproofed. I did some stretch and folds, but not very many to be honest. These were the proportions I used:

102 grams very active starter

265 grams all-purpose white flour

84 grams whole spelt

229 grams water

1.5 tsp salt

 

This is 15% starter, and 70% hydration. The rye spelt loaf I usually work with is 80%. 

 

Also, my loaves never taste sour any more. I used to get a more sour taste when I first started- I'm not sure what I'm doing differently but I love the sour taste. Sometimes I retard my spelt rye loaf for a few days and it still doesn't taste sour.

 

I'd appreciate any comments!

 

This is definitely underproofed. I just wonder how, since you gave it such a long BF. 

How cold is the house? There is a rule of thumb that for every 8°C more or less, you have to half or double the fermentation time (for example, if it takes 4 h at 20°C, at 12°C it would take about 8 h, at 28°C it would take about 2 h).

Thank you! Good to know, since I was thinking it was the opposite problem. I'm unsure of the temperature of my apartment, as I don't have a thermostat and use baseboard electric heaters. I'm guessing it was around 18 Celsius yesterday.

temps and recipe, try adding a few hours to the existing total time, then shape the loaf for a final rise.  The dough needs more time to ferment, both the bulk rise and the final rise need more time.