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Old 02-15-2012, 06:46 PM   #1
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Installing Radiant Floor Without Access to Floor Joists?


I own an old Victorian condo on the second and third floor and my heating situation is abysmal. I have the old stand up radiators in each room and an expiring furnace. I'm going to be redoing the flooring throughout the second floor and I like the idea of utilizing a radiant floor heating system. Obviously being on the second floor, I don't own the condo below me so I do not have access to the joints. Is there any way to install the system under a sub floor while I have all the floors ripped up?
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Old 02-15-2012, 06:59 PM   #2
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Installing Radiant Floor Without Access to Floor Joists?


Odd post. If it's a slab floor then that would have to be the first floor with concrete under it.
One of the joys of living in a condo is you have no control over things that would make your life more comfortable.
Better Insulation in the walls, new double paned windows, more insulation in the attic would all be ways to save on heat.
Under floor heat is going to need a boiler or a dedicated water heater.
Do a Google search on Radiant heat.
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Old 02-15-2012, 07:31 PM   #3
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Installing Radiant Floor Without Access to Floor Joists?


I'm referring to the system that loops under the floor between joists:

http://www.radiantcompany.com/images/doublerun.jpg

Obviously the easiest way would be to take it directly to the sub floor if you could get access from below, however someone lives below and I don't think they would approve me ripping down their ceiling! Adding an additional water heater or boiler is not a problem as I own part of the basement. There's a total of 5 units, it used to be an old mansion that was divided into condo units.
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Old 02-15-2012, 08:18 PM   #4
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Installing Radiant Floor Without Access to Floor Joists?


What you want to do is possible but it is very labor intensive.You might be a lot better off replacing your stand up radiators with the new flat panel wall radiators.These radiators come in many shapes and sizes ,someone would have to show you a catalog.The down side is that you would have to have wall areas with no furniture in front of them.
There is also a radiant system that looks like baseboard which in most cases you would need to wrap around the whole room.
There are lots of options for you but the one you have talked about is the hardest and most expensive to do.
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