Thanks for the info.

One question comes to mind. One my first (and only garage) I did a 6"
concrete floor with fiber reinforcement. No rebar and no mesh. Cut control
joints properly. A year later no cracks except the ones in the control
joints and everything looks fine.

If I put in radiant piping I must but in either mesh or rebar to hold the
piping in place during the pour. From what I've read on the concrete web
sites, the rebar shouldn't cross the control joints since that defeats the
purpose of the control joint. I guess the radiant piping can stretch a
little without a problem.

How did you handle the control joints or did you just leave them out?

Thanks.
Steve.



I cut corners, a decision I now regret with the cost of heating oil over
$2/gallon. At the time I could fill my tank @ 70¢/gallon. I used only
1"
of board (R-5), which I purchased directly from a distributor. With 2,600
sq. ft. of floor, the savings (over $1,000) was attractive, but foolish.
The board is made by Dow, and is blue in color. Unless one has a
terrific
floor load, the 25 PSI material with thick reinforced concrete should be
more than adequate, considering that works out to a loading of 3,600
lbs/ft.
I just wanted the added insurance to guarantee I wouldn't crack the floor
with my lift truck. Cork Insulation in Seattle was the source, if that
helps.

Harold