Double mashing and No. sparging.

[Lac]

Then my Brew No. 100 finished, it was a clone of "Denny Conn's Bourbon Vanilla Imperial Porter". It was double mashing and without sparge, I spent about 9 kg malt which was then split in two, added 4.5 kg malt at 40c, claiming to 67c in 75min. and ended at 78c. in 15min and then I cooled down to 40c and started over with 4,5 kg malt. I usually have one efficiency of 72% but this time it was only 61% after the first mashing matched the numbers after the recipe so it is another mashing that I lose some %. The brew day was extended for a few hours but it is not the last time I brew this way.

[OldScotchAle]

At the end of the first mash do you add water to bring the level back up to the original volume?

[Lac]

When I added malt second time I also added Water.

[OldScotchAle]

Thanks. I wanted to be sure. I'm thinking about a double mash. A Scotch Ale of course.

[Luis Coentrao]

Hi Lac,

Good experience with double mash & no sparge? Mash efficiency what about? Grain mill gap, how much?
How do you cool the wort between the mashes? Cool water, how much? 1L per Kg of grain?

cheers
luis

[Lac]

Good experience with double mash & no sparge?

The way to do it is okay, you extend brew day with a few hours.

Mash efficiency what about?

Was approximately 78.9 %.

Grain mill gap, how much?

I use 1.27 mm

How do you cool the wort between the mashes? Cool water, how much?

I used my herb cooler to cool down.

[Luis Coentrao]

Thanks Lac,
In single mashes, what is your mash eff? 80%?
No need to stir during the mash?

[Lac]

In single mashes, what is your mash eff? 80%?

Around 78%

No need to stir during the mash?

no I never stir the mash

[Luis Coentrao]

thanks Lac