yezzo

Recipes 

Hey new here, (sorry for any typos I just finsihed 2 bombers of fat tire and a sixer of sierra nevada pale ale)

How long does yeast last at room temp? Just a basic ale yeast.

I've had a couple packets of dry yeast sitting on my shelf for about a year now and i want to brew this weekend.

Judd

Recipes 

Yeast should generally be refrigerated. Dry yeast is pretty hardy, but after a year it's probably in pretty rough shape. I'd make a starter with it, just to make sure. You don't want to pitch it and find out that it's not active.

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malkore

Recipes 

either a starter, or 'proof' the yeast a few hours in advance. If it doesn't proof, its dead. Game over man, game over!

if it did sit at 70F and didn't have any temperature extremes, its most likely still viable.

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Malkore
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10

david_42

Recipes 

After a year at room temperature, dry yeast is about 30% dead.

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Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"