I have a question about mash temperatures and FG’s. After looking through my notes, I’ve noticed that I can reliably expect to lose approx. 4* over the course of my mash (I use a 70 Qt. Coleman Xtreme Cooler for my MT). It seems that no matter what the ambient temperature is or how many heavy blankets I throw over the cooler or how much insulation I use to fill any vacant headspace, I always wind up 4* lower than when I started.
This being the case, I’ve taken to splitting the difference with my mash temperatures, which is to say that I start 2* above the target mash temp. knowing that I will end up 2* below at the end of the hour.
Another problem that I’ve noticed is that my FG’s are tending to come out lower than expected, usually by 4-6 points, and I’m wondering if there is a correlation between the two.
Has anyone out there lived with this same issue of losing a predictable amount of heat during the mash? Should I perhaps mash 4* higher initially and aim to end at the target mash temp rather than splitting the difference? Also, would a thicker or thinner mash help with heat retention? I generally mash at 1.5 qt/lb.
Any direction appreciated!