From $148.00

Airtightness, smart vapor control, and dense-pack reinforcement all in one.

INTELLO Plus is the keystone to long-lasting air and vapor control »Read More


INTELLO Plus is a smart vapor retarder that provides a first class air barrrier for thermal insulation in roofs, walls and floors. More importantly it gives structural systems a previously unachievable degree of protection from structural damage (from condensation), even under extreme climatic conditions, due to its intelligent vapor retarding properties.

For example:
• Vapor closed flat/green-roofs
• Unvented pitched roofs (asphalt shingles, OSB sheathing, valleys covered by ice&water shield)
• Mixed humid climates with cold winters and air-conditioning requirements in summer
• Extreme climates such as in high mountain regions or very cold/arctic conditions

Offers the largest vapor variable range available – it additionally opens up at the right moment


• Perm rate from 13.20 to <0.13 (Sd value from 0.25 m to >25 m)
• Offers high diffusion tightness in winter (<0.13 Perm, protection against condensation)
• Maximum diffusion openness in summer (13.2 Perm, facilitates rapid drying to the interior)
• Especially suitable for structures with lower permeability on the exterior which are difficult to protect from condensation (flat or grass roofs or metal siding/sheathing etc)
• Works with wide range of insulation materials, including fiberglass, BIBS, mineral wool and many others.
• Translucent – allows dense packed blown-in cellulose insulation to be inspected after installation
— Use TESCON VANA Patches to cover holes from blown-in insulation
• Lightweight and easy to install, especially compared to OSB/Plywood
• Fully recyclable
• Air permeance per ASTM E2178 0.00005cfm/ft2
• Class A material per ASTM E84 test (0 FS, 35 SDI)

When exposure of INTELLO Plus to UV and rain can not be avoided/minimized, because of scheduling/design constraints – use INTESANA, which has same smart vapor retarding properties, but is rated for 2 month exterior exposure and is waterproof.

Available roll sizes:

  • 323 sq. ft. – 59″x65.5′ (short roll)
  • 807 sq. ft. – 59″x164′ (regular roll)
  • 1614 sq. ft. – 118″x164′ – XL – folded off center, so you can staple it up, before folding it down
  • Declare Intello

    Download Links:

  • INTELLO Plus Specifications (PDF)
  • INTELLO Plus installation instructions for wood stud assemblies (PDF)
  • Install Video
  • INTELLO Plus Specifications (PDF)
  • INTELLO intelligent vapor control system brochure (PDF)
  • INTELLO Plus installation instructions for wood stud assemblies (PDF)
  • 3 part spec – interior air- and vapor control layer (PDF)
  • 3 part spec – interior air- and vapor control layer (DOCX)
  • Install Video
  • How to install dense pack cellulose behind INTELLO
  • BLDGTYP details/photos of 0.45 ACH50 cabin in WI with a double stud wall, INTELLO Plus and dense-pack cellulose
  • – Smart Vapor retarders not just your grandmother’s poly
  • INTELLO Plus transforms assisted living facility in Mashpee, MA
  • 475 VIDEO: The INTELLO Plus Tear Test
  • The INTELLO Primer
  • Builder Testimonial: Brad Hankins on the INTELLO Energy Revolution
  • New Mold Growth Index and Safe Double-Stud Walls: WUFI Pro Shows INTELLO Plus is Key
  • In The News: Home Performance Industry using Intello Plus
  • Building Drying Reserves: 8 Situations Made for INTELLO PLUS Smart Vapor Retarder
  • Tales From An Intello-gent Tiny House: 10 In-Depth Answers From An Enlightened Customer
  • Waterbury VT Municipal Complex uses INTELLO Plus for Foam-Free Enclosure Moisture Control
  • INTELLO & DB+ Approved by DIBt for Use in Unvented Hot Roof Assemblies
  • INTELLO PLUS Resource Library
  • Installation Videos:

  • Install Video
  • Importance of Vapor Intelligence
  • Installing dense-pack insulation
  • Related Videos:

  • 475 VIDEO: The INTELLO Plus Tear Test
  • The INTELLO Primer
  • PDF Installation Guide:

  • INTELLO Plus installation instructions for wood stud assemblies (PDF)
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