What it takes to install Radiant Slab Heat
Prep-Work & Material not required when using a 
Warmboard
Additional Engineering
(This cost should remain the same unless you add the slab after engineering.)
Stronger, more expensive floor joist and support beam $???
(This cost could be substantial pending the final engineering.)
Add Blocking – Between studs (Every gap between studs) $???
(Additional 2 X 4’s needed, Additional Labor to install blocking.)
Build curbs at stair openings $???
(Additional 2 X 4’s needed, Additional Labor to install curbs.)
Build curbs at elevator shafts $???
(Additional 2 X 4’s needed, Additional Labor to install curbs.)
Install 2 X 4’s in areas where Hardwood Flooring is installed $???
(Additional 2 X 4’s needed, Additional Labor to install curbs.)
Seal all penetrations $???
(Gypcrete or lightweight concrete slurry will leak through any penetration into the level below.)
Slabs are never exactly level and/or consistent
Requires much hotter water to provide heat.
(Staple up heating tube water temperature range 160˚ – 180˚ Gypcrete water temperature range 140˚-160˚)
