Should I change out deep litter bedding before winter? Because it could cause too much moisture?

Livvydays

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I am a new chicken keeper as of this spring. I have 2 olive eggers, 4 light brahmas and one misc breed. All hens.

My inside chicken coop is in the corner of a garage that is not heated or insulated. It's in the shape of a hoop coop made of cattle panels. The exit for the chickens is a ramp up to a window that goes down and out into their outside chicken run. I have large and medium size flake of purchased pine shavings for their inside coop bedding. I have been doing the deep litter method and so far so good. The reason I chose to do deep litter method was because I want to compost the used deep litter and because I learned the deep litter method keeps them warm in the winter. I have not changed out the bedding yet. I was waiting to do that in the spring which will make it a whole year by the time this is done. I was told once or twice a year to change out bedding is fine. I live in Iowa. We can get pretty cold to below 0 at times. The floor of the coop is concrete under the deep litter. I do plan to throw a tarp over the top of the coop for added insulation this winter.

The outside run is also in the shape of a hoop coop. There is no floor in it. Just about a foot of sand over top of the soil. I have a tarp over the top but I do plan to add more tarps to the sides and most of the front while leaving some areas open for ventilation. I understand it's the moisture and drafts that are most concerning for chickens in the winter.

So to get to my confusion. I was watching a video on preparing for winter for your chickens. In the video it said to take out your deep litter and add new bedding before winter. This really confused me because one of the main points I thought was for the deep litter to produce heat and if you change the bedding now it's not going to produce any heat. Did I watch a video that didn't understand that or where am I wrong in my knowledge of all this? I definitely don't want too much moisture for them. And how much ventilation is enough? I will try to take pictures of my coop to attach.

On a side note I think maybe I will have to move their roosting bars lower so not by the window during the winter. Or if the outside run is closed in enough maybe the roosting bars are ok there. I will have to play around with those thoughts as well. I will shut the window in between every night and likely put a piece of something insulated in between the window and coop maybe as well when it's the coldest.
 
Inside coop
 

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Outside run
 

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You don't have deep litter in your coop, so any advice you've read about it (whether right or wrong) wouldn't apply. Even with deep litter in order for it to heat up you'd need a massive volume of it, like an actual active compost pile. A few inches of deep bedding is not similar.

Ventilation is key. Looks like the run is already somewhat closed in the and coop being in the garage doesn't have extra ventilation, though it does benefit at least from all the extra air volume due to the space housing it being larger, which will help.
 
I'm pondering your feedback and looked at my pictures again and I didn't really capture the depth of the bedding very well I will take a few more pictures to attach when the sun comes up. What is the correct information on deep litter and if it should be changed out before winter since deep litter is my goal?

On ventilation. What should I do different? I can open windows in my garage that are a little farther away from coop to not cause a draft while providing ventilation.
 
Since your coop is inside a building and has a concrete floor, you have deep bedding instead of deep litter. I think this is what most people have in their coops:) The main difference is that deep bedding will not compost enough to provide warmth to your chickens due to a lack of moisture. In the winter, this is actually a good thing because the excess moisture can lead to frostbite. Whether you change out the bedding before winter is up to you. I only change out the coop bedding once a year or so - when it breaks down and becomes super dusty or if I have to treat for mites before that happens.
Are there any chemicals/fertilizer etc. stored in your garage? If so, you need as much ventilation as possible. If not, I would close the side window and open the other windows so there aren't any drafts on your chickens while on the roost. If you need to leave the side window open, you will need to block the draft, but I don't think you need to tarp the whole coop. That can also lead to a build up of moisture under the tarp. Your goal is to keep the coop as dry, draft free, and as close to the outside temperature as possible. Between their fluffy feathers and huddling together, chickens can tolerate much colder winter temperatures than humans.
 
I am in NJ so not quite as cold as you get but still gets into single digits F from time to time.
I have deep litter in the run and deep bedding in the coop. I have a dirt floor so the coop could deep litter but there isn’t enough moisture.
I haven’t changed out the bedding in 5 years. No smell. If I am planting any shrubs I dig out a bucket of rotted down bedding to use as fertilizer, but that is it.
As we get into the coldest part of winter I add a layer of straw to the top of the bedding in the coop just because it seems to make it more cozy. Probably don’t need to - but my gang seem to enjoy it.
I can’t see well enough to opine on ventilation. Just 7 hens in a full size garage may not need extra ventilation. And if they are enclosed in the garage, ventilation out into the garage may be enough. If not, you will get condensation on the inside of the garage windows and maybe can crack those windows to increase airflow (provided it will still be a predator safe space by doing so).
 
I am in NJ so not quite as cold as you get but still gets into single digits F from time to time.
I have deep litter in the run and deep bedding in the coop. I have a dirt floor so the coop could deep litter but there isn’t enough moisture.
I haven’t changed out the bedding in 5 years. No smell. If I am planting any shrubs I dig out a bucket of rotted down bedding to use as fertilizer, but that is it.
As we get into the coldest part of winter I add a layer of straw to the top of the bedding in the coop just because it seems to make it more cozy. Probably don’t need to - but my gang seem to enjoy it.
I can’t see well enough to opine on ventilation. Just 7 hens in a full size garage may not need extra ventilation. And if they are enclosed in the garage, ventilation out into the garage may be enough. If not, you will get condensation on the inside of the garage windows and maybe can crack those windows to increase airflow (provided it will still be a predator safe space by doing so).
Just saw the inside the coop pictures. What a cute setup!
I would be inclined to lower the roosts so the windows are above their head. From the size of the space I am guessing you will be fine on ventilation but keep an eye open for any condensation on the inside of the windows.
 

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