tracyk
BrazoriaBrew
- Joined
- Feb 26, 2012
- Messages
- 416
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- 80
Hey Phischy- how did you fair with all the rain that has happened recently? Hopefully everything was okay.
Having had this in use now for 5 years I've learned a few things and here are some of my take away's.
If I were to build this again, I'd do it differently as I'm sure my vapor barrier must be leaking due to some symptoms.
1. I would build the walks in place and spray in place. Moving the pieces in as complete units was not a great idea as it may have caused things to shift.
2. Vapor barrier, instead of just using the sealant, I would have taped them as well. Maybe even double hung the plastic sheeting. This remains my biggest concern. By hanging the sheeting, taping it and building the walls in place may have resulted in a better seal and less chance of any tearing/abrasion. This is more true for the ceiling. Then you just put the exterior wall up, and spray from the inside. This will result in a better wall of insulation against the exterior.
3. I used fiber board, which when it soaked up moisture it expanded and caused problems.
Now, I did abandon and tore out the insulated 'conical housings' and instead installed a 40gal water tank which I ran plumbing and control wires out to the conicals that I then wrapped in soft coper, this works amazingly well for holding temps for ales. Can't really cold crash them though as the room is only 40F. In the winter I can hold lager temps around 55F. But it's just easier to roll the FV into the cold room where it's insulated with a heat wrap and I can maintain any temp there. I'm pretty sure this is where the moisture from the tank inside the cold room is coming from. The tank doesn't seal closed, it just has a lid that sits down on top and I have weight on it but it's far from perfect.
Lastly, where ever you plan to put holes through your walls (taps, coolant lines etc...) box that out and use rigid insulation instead of blown in. The blown in crumbles easily when tools are used. I'm pretty sure my tap wall is a big issue and this winter when it's cold I may disassemble, box it out, install rigid insulation and use a hole saw to re-install the shanks. I'm more convinced this is a point of failure.
Otherwise, I have really enjoyed it. I expected the first AC to last about 5 years and now that we're out of the heat of the summer I hope it'll last until next June. But I fully expect it to fail at some point now.
Which way you go should really depend on the R factor you want and how much space you have for 6-8" thick walls and what the building material cost is. If you have more space, then rigid insulation is probably a better way to go. I had space constraints so I was trying to hit my R factor with the least amount of wall thickness. I'd have also done the floor different, I used 1" thick floor plywood and epoxied it to save $$, I should have gone with tile because it would be easier to clean up. I guess I can always go back and fix this, but what a pain to haul everything out.Thanks for the update! I have not had hours to search the forums for walk in cooler stuff yet, but I am planning a cost build myself. 12x10 foot. Your build is inspiring and your follow up is very helpful. I honestly had not considered spray in insulation. Something else to consider, yay.
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