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Building a Root Cellar
Root Cellars are Ideal Cold Storage Areas for
Winter Vegetables
By: Mark J. Donovan
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Years ago I helped my father dig and
build a root cellar. At that time we had a large garden and we needed a place
to store winter squash and some of the vegetables that we canned. I also
remember us storing homemade root beer and occasionally finding the exploded
jar of it in the root cellar.
I have to say that our root cellar was one of the darkest and creepiest places
I have ever set foot in. Even though we made every attempt to keep it dry and
installed overhead electrical lighting (a single bulb), it was still a dark and
moist place, and consequently a breeding ground for some of the largest and
ugliest spiders I have ever seen.
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We lived in Maryland at the time
where the soil was mostly clay. Consequently it was easy digging. So easy as a
matter of fact that we wound up digging a 10 foot wide, by 12 foot long, by 9
foot deep root cellar, and capping it with a shed that we placed over it. The
shed had a trap door that allowed us access to the root cellar.
After digging the hole for the root cellar, and before placing the shed over
it, we framed and lined the root cellar walls with pressure treated 2x4 walls
sheathed with marine plywood. We also added cross bracing to prevent any threat
of cave ins. Finally, we poured a concrete floor to create a clean and level
surface. We also included a small well depression in one corner of the root
cellar for a sump pump, which we wound up needing more times than I can
remember.
After building the root cellar and sliding the shed over
it, we installed a couple of 3” diameter PVC pipes in the root cellar that
vented to the outside of the shed to allow the root cellar to breathe. We
also included a valve seal mechanism over the ends of the vent pipes to
enable us to seal them off during very cold weather and to prevent freezing
temperatures in the root cellar.
Finally, we installed shelving in the root cellar. In fact, we wound up
lining all of the root cellar walls with shelving from floor to ceiling,
and I must say we did a good job of keeping those shelves well stocked. |
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Building a Root
Cellar Today
When building a root cellar today you don’t have to go to the same level that my
father and I did. As a matter of fact, you can build a root cellar in your own
basement. Simply find the coolest and moistest area in the basement and close it
off with some 2x4 framed walls. Make sure you include an opening for a door.
Then insulate the walls with rigid foam insulation and sheath both sides of the
walls with a moisture resistant drywall.
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Also insulate the root cellar ceiling and sheath it with moisture resistant
drywall. Make sure to tape and mud all of the drywall seams to create a tight
seal in the root cellar.
It is important to note that the outside basement walls associated with the root
cellar be at least 2/3rds high backfilled with soil. The backfilled basement
walls help to ensure cool temperatures in the root cellar during the warmer
months
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Next, add some outdoor ventilation to the root cellar to ensure it maintains
a cool temperature, but not frosty temperature. Include valves on the
ventilation pipes to close off the root cellar to the outside elements when the
temperature drops below freezing. One ventilation pipe should be located about a
foot off the basement / root cellar floor and the other about a foot below the
root cellar ceiling.
Finally install a door onto your root cellar and build shelving for storing your
vegetables and canned food items.
Often a crawl space can also be converted into a functioning root cellar. You
can employ much of the same process for building a root cellar in a basement as
for building one in a crawl space. Again, make sure the crawl space is vented
and that you can open and close the venting depending upon outside air
temperature conditions.
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