Reflectix, Inc.

The World’s Largest Manufacturer of Reflective Insulation and Radiant Barrier Products
  • About Reflectix
    • Affiliations
    • Technical Support
    • Our Products, People & Service
    • Reflectix History 101
    • Reflectix Safety Guidelines
    • Testimonials
  • Reflective Technology
    • An Old Concept
    • Benefits
    • Performance Information
    • Reports and References
    • What About R-values?
    • Zip Code Zone Locator (for Attic & Cathedral Ceiling)
  • Applications
    • DIY
      • Attic
      • Basement Ceiling
      • Behind Hot Water Radiator
      • Cathedral Ceiling
      • Concrete Slab
      • Crawl Space R-16
      • Crawl Space R-21
      • Duct Insulation R-4.2
      • Duct Insulation R-6.0
      • Expansion Joint
      • Garage Door
      • House Wrap
      • Knee Wall
      • Pipe Wrap
      • Radiant Floor – Concrete Slab
      • Radiant Floor – Wood Joists
      • Snow Melt System
      • Storage Building
      • Unique Applications
      • Wall – Exterior (2 x 4)
      • Wall – Exterior (2 x 6)
      • Wall – Masonry
      • Water Heater
      • Wine Room
      • Work Shop
    • HVAC/R & Plumbing Contractor
      • HVAC Duct Insulation
        • Big Bubble
          • Big Bubble Duct Insulation R‑6.0
          • Big Bubble Duct Insulation R-8.0
        • Double Bubble
          • Duct Insulation R-4.2
          • Duct Insulation R-5.6
          • Duct Insulation R-6.0
        • Outdoor Insulation – Bubble
          • Duct Insulation Outdoor R‑4.2
          • Duct Insulation Outdoor R‑5.6
          • Duct Insulation Outdoor R‑6.0
          • Duct Insulation Outdoor R‑8.0
        • Fiber Duct Insulation
          • Fiber Duct Insulation R-8.0
      • Reflectix® Return Air Panning
        • RAP (Bubble) Return Air Duct Panning
        • RAP (Corrugated Sheet) Return Air Duct Panning
      • Pro
        • Attic
        • Crawl Space R-16
        • Crawl Space R-21
        • Expansion Joint
        • Pipe Wrap
        • Radiant Floor – Concrete Slab
        • Radiant Floor – In a Subfloor
        • Radiant Floor – Over Existing Floor
        • Radiant Floor – Wood Joists
        • Snow Melt System
        • Water Heater
    • Metal Buildings
      • Product: Reflective Both Sides
        • Roof – New
        • Roof – Retrofit
        • Wall – New
        • Wall – Retrofit
      • Product: Reflective One Side
        • Roof – New
        • Roof – Retrofit
        • Wall – New
        • Wall – Retrofit
    • Post Frame Buildings
      • Product: Reflective Both Sides
        • Roof – New
        • Roof – Retrofit – Bottom of Purlin
        • Roof – Retrofit – Bottom of Truss
        • Wall – New
        • Wall – Retrofit
      • Product: Reflective One Side
        • Roof – New
        • Roof – Retrofit – Bottom of Purlin
        • Roof – Retrofit – Bottom of Truss
        • Wall – New
        • Wall – Retrofit
    • Pro
      • Agricultural / Livestock Buildings
      • Attic
      • Cathedral Ceiling
      • Concrete Slab
      • Crawl Space R-16
      • Crawl Space R-21
      • Expansion Joint
      • Knee Wall
      • Radiant Floor – Concrete Slab
      • Radiant Floor – In a Sub-Floor
      • Radiant Floor – Over an Existing Floor
      • Radiant Floor – Wood Joists
      • Sill Sealer
      • Snow Melt System
      • Wall – Exterior (2 x 4)
      • Wall – Exterior (2 x 6)
      • Wall – Masonry
    • Shipping Products & OEM
      • Shipping Products
        • A/B Box Liners
        • Gusseted Bags
        • Mailer Pouches
        • Pallet Cover
        • Thermal Pouches
      • OEM
        • Capabilities and Benefits
        • How Does It Work?
        • Proven Applications
        • Product Specifications
  • Products
    • Concrete Slab Insulation
    • Double Reflective Insulation
    • Duct Insulation (Indoor and Outdoor)
    • Duct Insulation Spacers
    • Expansion Joint
    • Pipe Wrap Insulation
    • Radiant Barrier (Reflective/Woven Fabric/Reflective)
    • Return Air Duct Panning (Bubble)
    • Return Air Duct Panning (Corrugate)
    • Sill Sealer
    • Single Reflective Insulation
    • Tapes: Foil and White Poly
  • Literature
    • Air Space Requirements
    • Energy Tax Credit Certificates
    • Federal Trade Commission Fact Sheet
    • HVAC/R Literature and Submittals
    • OEM Literature
    • Pro Building Literature
    • Reflectix Safety Guidelines
    • Retail Literature
    • Shipping Literature
    • Safety Data Sheets
    • Technical Literature
  • Contact Us
    • Contact Information
    • Locate a Retailer
    • Questions / Suggestions

Media

Crawl Space R-21

Download N34 R-21 Crawl Space Submittal Rev 0515

Download N34 R-21 Crawl Space Submittal Rev 0515

Video Library

For addition videos,
click here.

We Visit the Cajun Contractor
Attic

Crawl Space R-21
HVAC Ducts – Pro Installer

Products Introduction
Locate a Retailer
Product Calculator
Federal Tax Credit Information
Reflectix, Inc. #1 School Street, (PO Box 108) Markleville, IN 46056 • Phone: (765) 533-4332 or (800) 879-3645 • Fax: (765) 533-2327 • Email: customerservice@reflectixinc.com
All Photos, Renderings, Illustrations and Literature are the Property of Reflectix, Inc. All Rights Reserved.