Radiant Heat Concrete Slab — Radiant Heat In Wood Floor Joist — — InsulationStop

Radiant Heat Concrete Slab - Radiant Heat In Wood Floor Joist - - InsulationStop

Concrete Slab & Radiant Heat: Radiant Heat in Wood Floor Joist

R-17 to R-21 and a Radiant Reflector (Maximum Benefit Application)

This application is ideal for a radiant floor system above or below a wooden (joist) sub-floor. The benefits provided by Tempshield are dramatic. In addition to an impressive R-21, the reflective film provides a 96% reflectivity of radiant energy back into the system. The product has the added attraction of ease of handling and installation.

Standard Size Recommended Products:

Custom Size Recommended Products:

  • Up to R-21
  • Reflects 96% radiant energy back up into sub-floor
  • Reduces annual energy costs of the system
  • Installs quickly and easily
  • Product is dust and fiber-free
  • Does not require any protective garments or respirators
  • No nesting characteristics for insects or rodents

Testing and Certification:

Tempshield products are thoroughly tested at either nationally approved independent laboratories or leading universities. Tests are performed to current American Society of Testing and Materials (ASTM) standards when a standard exists. For a copy of an actual test report, please e-mail us at customer.support@insulationstop.com.

Installation Instructions: There are 5 Methods of Installation (with varying levels of benefit)

Concrete Slab Radiant Heat — Radiant Heat In Wood Floor Joists — Installation Instruction

Radiant Heat Concrete Slab - Radiant Heat In Wood Floor Joist - - InsulationStop

1. Product (Double Layer) Installed to Underside and Inside of Floor Joist — R-17 and a Radiant Reflector

  • Begin at one end of the house. Insert the first course of Tempshield half way up into the joist cavity and staple (at approximately 3 to 4 intervals) the edge of the product to the side of the joist. The goal is to split the joist cavity into two approximately equal enclosed air spaces.
  • Continue with the second course of product at one end of a joist cavity (after the first course has been installed) and secure the product end with staples to the sub-floor or band board. Proceed down the joists by stapling each edge (or middle of the Reflective/Bubble/Bubble/Reflective 48 wide product) to the face of each joist. Staple the product at intervals of approximately 3 to 4. Enclose the entire joist run(s).
  • Seal seams with Tempshield Foil Tape to create a vapor/moisture barrier.
  • Repeat for each joist that contains the Radiant Floor System.

2. Product Installed to Underside of Floor Joist — R-17 and a Radiant Reflector

  • Begin at one end of a joist cavity (that contains the Radiant Floor System) and install the product end with staples to the sub-floor or band board. Proceed down the joists by stapling each edge (or middle of the Reflective/Bubble/Bubble/Reflective 48 wide product) to the face of each joist. Staple at intervals of approximately 3 to 4. Enclose the entire joist run(s).
  • Seal seams with Tempshield Foil Tape to create a vapor/moisture barrier.
  • Repeat for each joist that contains the Radiant Floor System.

3. Product Installed Inside the Joist Cavity — Diminished R-Value / Radiant Reflector

  • It is possible to install the Tempshield inside the joist cavity (utilizing the Reflective/Bubble/Bubble/Reflective, Staple Tab product).
  • Start at one end of the house. Tuck the Tempshield into the joist cavity.
  • Each edge of the product has a 3/4 staple tab. Determine the depth inside the cavity that the product is to be installed and attach the product with staples (through the tab) at approximately 3 to 4 intervals. Repeat on opposite joist.
  • The less air space between the product and the sub-floor, the lower the R-Value (although reflectivity will be maintained).

Examples of benefits based on air space width above product:

0.5 air space = R-2.7

0.75 air space = R-4.6

3.5 air space = R-8.2

4. Product Installed Inside the Joist Cavity with Mass Insulation Below

  • Diminished R-Value / Radiant Reflector
  • It is possible to install the Tempshield inside the joist cavity above a Mass Insulation Batt.
  • Utilize Reflective/Bubble/Bubble/Reflective, Staple Tab product Method specified in #3.
  • Refer to R-values in Method #3 to determine benefit gain in your system.

5. Product Installed Inside the Joist Cavity with Mass Insulation Above R-2.7 with a 0.5 Enclosed Air Space or R-4.6 with a 0.75 Enclosed Air Space

  • Tempshield can be installed below the Mass Insulation Batt.
  • Refer to Method #3 for installation procedure, air space options and resulting R-Values.
  • Finish with an interior panel below the Tempshield (typical when finishing a basement).

For all methods (retrofit), inspect the structural integrity of the sub-floor, and make any needed repairs before installing Tempshield.

Installation instructions and illustrated drawings are recommendations only, while proper local construction methods are the responsibility of the installer.

Important: Review These Important Safety Guidelines Prior to Installation.


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