With over 75% of the downward heat loss radiant in nature, 96% reflective TVM bubble foil is ideal for this application.

Method 1 Rim Joist North/South Elevation Method 2 Rim Joist East/West Elevation

PRODUCT SOLUTION: TVM Bubble Barrier Foil

• Method 1 - Rim Joist North/South Elevation, Barrier rFoil (1220-16-125) 16" Width
• Method 2 - Rim Joist East/West Elevation, Barrier rFoil (1220-48-125) 48" Width

PRODUCT DESCRIPTION:

• Bubble Barrier rFoil is 96% reflective, very puncture resistant and easy to apply.

PRODUCT EFFECTIVENESS:

• As of this printing, TVM is conducting ASTM testing for R-14 and R-21 crawlspace assemblies, to completed in January 2002 for use within Title 24 calculation. For calculated assemblies of R-6 through R-22 by David Yarbrough, PhD, PE, please call (510) 548-1377.

INSTALLATION METHOD:

• 1) Don't use any fibrous insulation between joists, only under rFoil, as required.
  
• 2) Staple Bubble Barrier rFoil from the upper part of the rim joint to the bottom of the sill plate, as in N/S elevation. Use a 16" material (illustration #1).
• 3) Unroll & staple 48" wide Bubble Barrier rFoil under the floor joists. Be sure to seal it well around the perimeter (illustration #2).
• 4) Seal the joints and perimeter using rFoil regular foil tape 3" Wide (04603).

BUILDER'S NOTE FOR A HIGHER R VALUE:

• 1) Install a wood strapping over the Bubble Barrier rFoil perpendicular to the joists.
• 2) Nail the rigid installation following the manufacturer's instructions. Make sure the air space between the rFoil and the rigid insulation is well sealed.
• * All tape should be applied using a flat-edge taping tool to ensure good adhersion.

Crawlspace Information and Documentation

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• TVM Crawlspace
  • Download Crawlspace Section (.pdf, 170kb)
  
  
• JTG/Muir Catalog Pages
  • Product Listing (.pdf, 298 kb)
  
  
• TVM - Home Page

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