I can't tell you what seals they used, but I can tell you that when I pull in to the garage and close the overhead there is enough pressure inside that my 11 year old can't get the man door open. It's really that tight.
I found this thread a few years ago when I was planning my garage. The garage has been done for 18 months now and this thread is pretty much the only reason I visit regularly.
The automation rabbit hole is intriguing; but finding the time to wrap my head around it all isn't there.
Thanks for...
Installing the tubing is relatively cheap up front; especially if you DIY. The rest of it can be done later when funds allow.
If you don't DIY some jurisdictions require a licensed plumber to lay tubing - significantly adding to the expense.
My $.02
My wife pays that utility bill. I asked last winter if the warm garage had much impact on the costs - she said she didn't notice it. I'm in North Dakota for reference - NG and foamed tight 24x38' with lots of garage door.
When I built last summer I updated to 400a. 200 for house and 200 for garage. It cost very little extra to overbuild it. I'm ready for whatever the future brings (fast charging?, welder?, table saw? a/c? - all at the same time? No problem).
I used a sticky glass mesh and stucco directly on the foam on the house a few years ago and it's held up everywhere I didn't touch it with the weed wacker. On my garage last summer I hung the walls over the perimeter insulation and ran a ring of two foot tall strips of green plywood to earth...
I have been wrestling with this problem as well. My current solution is to neutralize and fill a 50 gallon rain barrel. I drain it once every 2 weeks into the yard. Not an elegant solution, but is a temporary fix for now that requires very little maintenance. I'll recommend an industrial can on...
Each situation is different. I found this thread looking for a solution to my own garage humidity problem:
900sq', 10' walls, completely foamed tight with closed cell up to R24. Radiant in slab, North Dakota (below 0F and getting cooler this week). Major moisture problem now due to snow melt...
I used my local lumberyard guy. We talked and went through several iterations of plan before we settled on a final version. It was only $800 and worth every penny. It also made material orders easy because they speced everything up front. I was the general so YMMV. It turned out great!