14'x10' wood shed floor insulation question.

HarryJM

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Hey Everyone,

My next shed to shop project is insulation for the floor/wall/ceiling and double doors. Shed is currently wired so everything inside is ready to insulation.

The back side of my shed (length wise) is only about 6”off the ground and I had to replace the T11 wood siding about 5 years ago do to rotted wood at the bottom. I will be installing gutters prior to floor insulation and my qut feeling is that even with the gutters is that any insulation butting up against the 2”x6” floor band will allow water to splash up into the floor insulation between the floor joist. Would a solution be to install rigid insulation from the 2”x6”floor band to the inside of the 4”x6” wood bean and then fiberglass insulation batts for the rest insulation? The front of the shed is about 2' off the ground so I do not have any water splashing issues to contend with there.

Had a ridge vent installed with a new roof about 5 years ago and no soffit vents, which I plan on installing. Shed currently resides on 2 4”x6” beams running length wise about 19” in from each length wise outside edge with 4 cement blocks under each beam. My metal lathe and end mill each weight around 600 pounds each and I plan on installing another 4”x6” beam centered between the two existing ones to provide extra support for when I move my equipment out from sitting right up against the walls (under the current 4”x6” beams). My floor consists of 2 sheets of plywood with 2”x6” 16” center joists.

I live in Greensboro NC and get a little bit of all kinds of weather. I keep a fan running inside the shed with used light weight cotton sheets covering the machines and do not have any big humidity issues so I must have some good airflow. I plan on using a oil filled radiant heater for the winter and also a portable dehumidifier when/if needed and open windows/doors for all other seasons.

296490
Thanks in advance for any/all responses.

Harry
 
I have a oil filled electric heater in my shed workshop. I keep it running all year round, as it has its own thermostat. I have it set to the lowest setting whilst not in the shed, and it keeps the temp constant during the colder months. It shuts itself off when it gets warmer - but it’s on standby for the cold snaps we always seem to get right around now.

dehumidifying is done with one of these:

Ive been toying with the idea of a small electric dehumidifier to replace it (even though it works very well), but I’m running out of outlets! :p
 
I would suggest rockwool or the rigid insulation with insecticide. Everything else seems to have issues with moisture or critters. If you use the rockwool iwould do a bottom layer of rigid or stretch wire mesh to insure the bigger critters stay out of it.
 
I have a oil filled electric heater in my shed workshop. I keep it running all year round, as it has its own thermostat. I have it set to the lowest setting whilst not in the shed, and it keeps the temp constant during the colder months. It shuts itself off when it gets warmer - but it’s on standby for the cold snaps we always seem to get right around now.

dehumidifying is done with one of these:

Ive been toying with the idea of a small electric dehumidifier to replace it (even though it works very well), but I’m running out of outlets! :p
Thanks for the info on the dehumidifier as that maybe an option.
 
I would suggest rockwool or the rigid insulation with insecticide. Everything else seems to have issues with moisture or critters. If you use the rockwool iwould do a bottom layer of rigid or stretch wire mesh to insure the bigger critters stay out of it.
I used rockwool for the interior and thought it might me a good solution for the floor along with you ridid/wire mesh idea.
 
Rockwool is great stuff. For a year I had batts of it on the floor of the barn loft that is the ceiling of my shop. The squirrels and owls and whatnot that use the barn as a sort of bus station restroom gave the rockwool a pretty wide berth. Supposedly, it deters mice and such by being extremely uncomfortable.

Regarding humidity, I have a portable dehumidifier (99 bucks or 150 or something as the box store) that is pluged into a timer on the outlet. After some experimentation, I found that running for an hour twice a day (once at the hottest part of the day, once at peak dew point in the wee hours) keeps the humidity down. Paying one of the most expensive electricity rates in the nation, it added under a dollar to the monthly bill.
 
I'm in northern WI. I insulated the exposed floor of a spare room with fiberglass batts between the floor joists. The floor stayed cold. With air movement under the floor, the batts didn't create a dead air space. I had to crawl under it and install plywood against the underside of the joists. Then the floor was warm. I had 12"-15" to work in. I did this when I was much younger, thinner, and spryer.
 
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