Radient floor heating systems

N_carolinian

1)Cost? (charge by square foot or other dimension) 2)maintainance? (Need a lot of maintainance) 3)durability if outside? (how long will it last)(will rain or freezing temperature damage it) 4)can it even be installed outside? 5)can it be installed into concrete? 6)can it be installed into majo bridges or overpasses?

Unknown

An outdoor radiant system is usually called "snowmelt" heh...

What exactly are you trying to do?

Earthfire

bridge install

Try this link: http://www.igshpa.okstate.edu/ They were running a test on just that question.