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Author Messages Oldest First Newest First mlboll Registered Users Posts:7 07/25/2006 12:29 PM   I have about 1900 sq. ft. of Warmboard installed in a new residential construction project. As I look at it from the outside I can see the Warmboard edge exposed and the tube groove openings where the board was cut to fit the panel in a few places. This is the normal exposed area where the subfloor meets the outside walls. Should these grooves be filled for insulating purposes? Further, should the edge of the Warmboard be insulated as well? The outside plywood has yet to go up and the siding/brick will be another layer, so it won't be totally exposed. Do I need anything else for insulation or am I over analyzing things? Thanks! P.S. - My contractors had no problem installing the Warmboard. They were impressed with the quality. Great experience in the ordering process. Warmboard staff offered help every step of the way. Can't wait to see how it works this fall/winter. NRT.Rob Registered Users Posts:336 07/25/2006 3:12 PM   Hi ML. This is a pretty small detail, so I would not consider it very critical by any stretch. Certainly if you had some kind of continuous outer foam sheathing that would be great, but short of that I have no idea how you would insulate that edge. If you want a real anal detail, take a shallow-set suitable saw blade and cut the aluminum between the heated side of the wall and the outside somewhere. This isn't major, but at least you can break the direct conduction through the aluminum to the outside of the panel. Probably would help a little bit anyway. -=Northeast Radiant Technology, LLC=- www.NRTradiant.com -=Northeast Radiant Technology=- NRTradiant.com mlboll Registered Users Posts:7 08/04/2006 12:28 PM   Thanks for the reply. I'll probably just let it go. My contractor has the house enclosed (final windows are being put in today). This weekend I'll be cleaning the grooves of the Warmboard and the tubes go in on Monday. As they put on the side walls, did the custom routing for toilets, and walked on it, quite a bit of dirt and sawdust got in the grooves. It will take a few hours with a shop vac and some rags to get the Warmboard ready for the tube. I'd rather do that step myself than pay a HVAC guy to do cleaning. After the tube goes in we plan on putting down a 4 mil layer of plastic to keep the Warmboard/tubes clean during the rest of the construction process. It may offer some protection, too, but keeping the dirt from getting between the tube and aluminum is the goal... maximize that heat transfer. We've been saving cardboard to put down here and there to offer more protection. The plan is to cut the plastic out before the final flooring goes in. Any other suggestions out there? Thanks!
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