Mash In and Mash Out

[UnderDogs]

If you can't tell I'm new to homebrewing. I'm still waiting for xmas so my very nice wife will give me my kit so I can start brewing.

Anyway, I downloaded the BeerSmith trial software and was looking through the all grain ingredients.

The instructions say
Step Mash In - 45 Min
Step Mash Out - 10 Min

What exactly does Mash In and Mash Out mean?

I've watched a bunch of video's on YouTube about all grain brewing so I know the whole process. Is Mash In where you put the water in with the grains and let them sit for a while and then Mash Out where you use the sparge water to get the rest of the sugars out of the grain?

If so do you Mash In for 45 Min then start taking the wort out and then add the Mash out for 10 Min then take that wort out?

 

[bigin31]

Mash in is where you add the water. Mash out is where you add hot water to raise temp to 170. This stops the saccharification process.

 

[UnderDogs]

So if it says Mash in 45 Min and Mash out 10 Min.

That would me put the first water in for 45 minutes, then after that put the second amount of water in for 10 min. THEN start draining the wort?

 

[bigin31]

Yeah. But I have never heard of a 45 min mash. I would put water in mash tun. Let sit for 50 to 55 min then add 170 water. The extra ten mintues isn't going to hurt anything. If nothing else it will get a wee bit more sugar for you.10 mintutes after adding the 170 water, drain the wort, recirculate with more 170 water and voila. You have an outstanding pre makings for a fine brew.