shipping container workshop?

[gavztheouch]

Spray insulation and then maybe osb or plywood or possibly just leave the foam exposed.

[T0rnado69]

sounds like a fun project LOL

[EddyCurrent]

I've worked out of containers workshops before and they do run with water, I would rather insulate the farm shed.
If you treat it as a 'cold roof' design and use this stuff http://www.celotex.co.uk/application...d-under-joists
but make sure you comply with ALL the requirements of a 'cold roof'.
My workshop now is a double skin with cavity block building but I still need a dehumidifier going otherwise things get rusty, it's to do with the 'dew point'

[gavztheouch]

Thanks Eddy, did you have insulation in your container?

[EddyCurrent]

Thanks Eddy, did you have insulation in your container?

Some were used for sotrage and did not have insulation but vents had been fitted along the top and bottom so that the air inside was at the same temperature as the air outside.
Some were plywood lined and were quite good but I have no idea what was going on behind the wood (between the wood and metal), nobody cared either because they were just scrapped at the end of the job.
There was no heating in any of them and gas heating is the last thing you want due to the huge amount of water they produce.

[gavztheouch]

Thanks thats interesting, sounds like there is a lot more you could have done to help prevent water build up. Im hoping this is possible to have a decent protection. I remeber going to a military event day and they had shipping contianer workshop full of machine tools.

There is some good advise on this website
http://www.dampstick.com/for-shipping-containers/

[EddyCurrent]

At the end of the day it's physics, warm air condensing on a cold surface, warm air holds more moisture than cold air.

From Wiki

"The dew point is the temperature at which the water vapor in a sample of air at constant barometric pressure condenses into liquid water at the same rate at which it evaporates. At temperatures below the dew point, water will leave the air. The condensed water is called dew when it forms on a solid surface. The condensed water is called either fog or a cloud, depending on its altitude, when it forms in the air."

"Relative humidity of 100% indicates the dew point is equal to the current temperature and that the air is maximally saturated with water. When the moisture content remains constant and temperature increases, relative humidity decreases"

Control that lot and you're there !

So with my dehumidifier I keep the relative humidity below 50% whatever the temperature and that's mostly to keep my wood right but also keeps rust at bay. If I put my wood burner on the relative humidity can drop to low 40's%

[Tenson]

If you insulate the entire container really well, it will only require a small heat input (when closed) to keep it warm enough to stop dampness. Remember that insulation will not keep it warm in itself, it just stops heat escaping so you will still need a heat source.

I used to work in a small recording studio where the room was kept closed nearly all the time and had sound-absorption over most of the room surfaces. Even just running the computer and an amp the room was noticeably warmer than anywhere else. I calculated that was probably about 100 watts of heat output keeping the room warm.