Since 1988

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EFFICIENCY COMPONENTS

How Heating Systems Heat A Room

 Wall Radiators

(similar to baseboard heaters)

Forced Air

(Typical Furnace)

Warmboard

(Floor Heat)

* Radiant Slabs are all about thermal mass; Consider the 1/3 loss of thermal mass under hardwood flooring?

Radiant Slab Floor - Prepared For Installing Hardwood Floors

(Gypcrete - Lightweight Concrete)

Photo Example For Hardwood Flooring Location

Cold Spots In Your Radiant Slab

("X" denotes a void in the slab. 3-1/2" by the length of the board)

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

Photo Example - Preparation for hardwood floors

(Every 16" a 3-1/2" wide piece of wood)

ProvideS nailing for hardwood flooring.

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 beams $???

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 a much hotter water to provide heat.

Staple up heating tube water temperature range 160˚ - 180˚

Gypcrete water temperature range  140˚-160˚

 

  Wood is an Insulator. (R-1 per/inch)

 

In the photo above, for every 32 square feet of sub-floor -  11.66 square feet  or 1/3 of the thermal mass is lost.  $???

OPERATING TEMPERATURES (Floor Heating Types)

Gypcrete or Lightweight Concrete

(Slab Heat)

Operating Water Temperature

140˚ - 160˚

Warmboard

Operating Water Temperature

115˚

10% -20% Comparitive Savings

Staple Up

(Underfloor heat tubing)

Operating Water Temperature

160˚ - 180˚

WEIGHT COMPARISON

Warmboard  -vs-  Slab Floor

$ ADDITIONAL COST !

1/5Th The Weight

5X More Weight

Standard Strength Floor Joists

Increased Strength Floor Joists

$ ADDITIONAL COST !

WARMBOARD   Dimensions

TERRITORY

FUTURE CLIENTS

HIGH EFFICIENCY

Earth Friendly Homes

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J Tillman Group, Inc.

Post Box 195

Pine, Colorado 80470