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Heating a Garage
Another thing to consider is your equipment needs. If you have to bolt equipment to the floor you don't want to accidentally puncture a heat tube.
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Heating a Garage
Botamac
Not sure if you saw this, I am definetly checking this out on my next house,cellar floor and garage.
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Heating a Garage
Grinder, what is the company name of the solar unit? I've been getting quotes for an expansion on one of our shops and they tell me to figure about 3.50 to 4.00 dollars a square foot. Trying to run the numbers and figure which system is the most economical in the long run is fun. We do burn waste oil in all of our stores and have been looking at one company that does use a boiler instead of the forced air style. The heated floors in our area allows commercial plow people quick thaw downs after plowing and the heated floors are great to work from. Ken did bring up a good point about having to fasten things to the floor could get nasty!
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Heating a Garage
I've never been involved in puting water lines is a concreet floor, but I know there are several in our aeria. My queston has allways been about the cracks in the floor where they saw the expansion joints. What keeps the pipes from cracking too when the concreet shrinks back from the crack? Frank.
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Heating a Garage
As long as you are pushing heated water through the lines, the concrete does not change temperature much, therefore there is very little expansion. The lines that I used were covered with an industrial vinyl type coating and are guarenteed for 100 years by the manufacturer. There is no question that heating from the floor up is the most economical in the long run. And since the conctrete does not crack due to temperature change, it should last right through your children's lifetime. I will never put concrete in a building again without it. FYI - Some people who burn wood simply use a water heater as a back-up to their wood boiler. It is very effective and inexpensive...what more could you ask for? If you are bolting things to the floor, put in anchor bolts prior to pouring to prevent the disaster of damaging a line. 
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Heating a Garage
Sorry, thought I posted the company. I'm sure there are many.
It would take a little planning, but you could put all your anchor's in at the time of the pour. I would also take some pictures before pouring for future ref. I suppose you could take some measurments as well (to the pipes).One thing that is for sure Art, the price of sunshine.
Frank, I believe they use Peck(sp?) tubing, very rugged platic water line.
I would want to have a very compacted base with a 6 mil poly
laid in first, so the cement won't dry to fast. I would keep it wet for several day's as well. This should min. cracking.
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Frank - When we dod my kitchen floor we tie strpped the tubbing to metal mesh which comes in rolls...simular to chicken wire only thicker. We rolled the metal mesh outfirst & stacked it down, then we ran the same tubbing that dk is speaking of. We ran it like a radiator zig zaging the lines & spaced them about 12" apart. then the concrete gets poured over the whole thing. the tubbing is about 3" under the surface. If you wanted to bolt something to the floor after is was poured...I would suggest making a diagram of exactly where each tube is like first pipe starts 3' 4" from outside eastside wall & 12" apart from there. Or depending on what your mounting to the floor use a bolt that you will only penetrate 2" into the concrete.
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a friend of mine has 3 buildings for his buisness , they are 75x125 metal insulated, with sheetrock. the first 2 are oil forced hot air with programable thermostates that lower the temperture after everyone leaves at night. The third building he was talked into radiant floor heat. After it was fully adjusted it usses less oil then the first 2. he also keeps the temp. a little less then the other 2 but it feels nicer.Something else he found out was that it doesn't spread the dust around as much.
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Art,
If you are going to try to heat the floor with a liquid,
you may want to ask about a buried storage tank.
A friend has two 1000 gal tanks buried in stone hooked into his hot water system. He can let it shutdown for several days and still have all the heat he wants. Just a thought.
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Gas Generator Weather Protecti
01-14-2005, 10:30 
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