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Author Messages Oldest First Newest First jfmia Registered Users Posts:2 12/16/2007 7:46 AM   Is there a radiant system out there that will allow a retrofit over an existing concrete slab?  I have visited the Radiantec website and don't believe this is an option.  Thanks. NRT.Rob Registered Users Posts:336 12/17/2007 10:36 AM   Roth Panel is a good product for that. -=Northeast Radiant Technology=- NRTradiant.com jfmia Registered Users Posts:2 12/17/2007 5:37 PM   Thanks, Rob. John Britton Registered Users Posts:2 01/05/2008 3:33 PM   We installed a hydronic radiant floor over our existing concrete slab when we did a seismic retrofit in 2001 of our old warehouse space.  (Still have the original single glazed metal sash windows which are almost 40% of the wall area.) Systems Description: 6x6 WWM shot through R-Foil radiant bubble pack    R-Foil was turned up Sills and extra blocking about 6" Pex Tubing wired to WWM 2.5-3.5" of highly plasticized concrete over all(slab was uneven) Taco pumps and controlers with a custom soldered manifold (no pre-made ones available at the time) 50 gallon Bradford White DWH. Results have been superior.
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