Certainly moving in that direction so need both quantified.
But:
It has been already said that plastic is easy therefore cleaner.
Do not have to build the square 10' by 10'; only the lower what's left (more than half not built!)
Ventilation mods needed for pref-fab
I disagree.
@Wee Farmer Sarah never mentioned an extension so in that case no "air cushion" (Even by just leaving the doors off). A true Woods has two areas: a square and what's left; the square is the back 10' by 10' w/high roof, the what's left is the 6' by 10' in the front w/low roof; both...
We are getting mixed again.
The "modification" that was raised and discussed was the "porch" that would make it "like a woods". That scenario did not discuss the roof of the pre-fab, it was joined but not covered. So, back to life span - must clear the snow off it or life is shortened.
Close. I understood @Alaskan to be saying build a connecting new "open front porch" and hook the shed(s?) to it modifying only to provide predator protection. Leave pre-fab doors off and let the "air cushion" be created by having air come in the open front.
In principal this will work for the...
I think there are two suggestions on the table that are getting jumbled.
@Wee Farmer Sarah said "Build an exterior frame to hold a new sturdier existing roof that is more sloped and overhangs the original vents" in post #10 and then referenced it "Had I not sold that house and left the...
Brockville (OP's home city) is on the St. Lawrence seaway. I am about 150km north of that. It would be very unusual to have a week of -30C but we very occasionally have lower temperatures; weeks in the -20C to -30C area do happen; normal temperatures in the minus teens. His area is damper and...
Retro fitting anything can turn out well, however nothing beats a good hand built to purpose wooden shed. Plastic and wicked winters do not mix well and over the years will fade, crack, break (hinges etc). BUT @Countrymanfowl already owns two(?) of his and "inexpensive" was his stated goal.
No confusion I knew to whom you were speaking.
The pictures I posted is/was a plastic pre-fab, do not know who made it. The roof is new made from wood and tin with vertical wooden posts inside to support the trusses. Same thing could be done with an exterior frame.
The past winter was the worst in decades. Normally snow on a steep steel roof such as the one shown will come off multiple times on it's own. This past winter the snow slid off only once toward the end, we had at least 3 feet of snow accumulated and this shed came through that just fine.
I...
Please note I was not recommending modifying just responding to the @Countrymanfowl question.
This pre-fab shed previously collapsed from snow load, picture shows the new roof. The shed is locked so could not get inside pictures, I saw inside inside last summer and recall six vertical posts...
Seems it requires 1 square foot of ventilation per bird.
https://www.backyardchickens.com/threads/how-to-measure-gauge-venilation-airflow.1266747/#post-20347179
A plastic shed can be augmented to raise the roof; one builds either an internal or exterior wooden frame. The lady across the lake from me has done it I could send pictures.
Again there is a formulae for how much ventilation is required.
You need to keep the birds out of any moving air...
Remove at least the roof insulation.
Raise the roof in some clever way and install 1/2" hardware cloth over the openings.
There is a formula for vent sq inches per bird, @aart will know it