September 13, 2017

Installation instructions For Using INTELLO Plus In Wood Frame Buildings With Blow In Insulation

This video covers how to properly install INTELLO Plus membrane with blow-in insulation, such as cellulose, loose fiberglass, or Havelock sheep wool insulation. In these situations, INTELLO Plus serves as interior enclosure airtightness, smart vapor retarder, a moisture management system, and netting for packing blow-in insulation behind. Here is a list of the top install tips from the video that you and your team can refer to during the installation process.

Top tips from the video:

Prep the site

  • Check framing for any protruding objects that may tear the membrane before installing
  • Only apply tape to dry, clean surfaces to ensure adhesion and airtightness

Unroll the membrane

  • Leave 1” overlap of membrane covering the floor for future sealing
  • Make sure the writing on the intello is facing into the room


  • Staple in a triangular pattern as you move along the studs to ensure the membrane is taut
  • Staple parallel to the studs
  • Staple at 3” intervals
  • Make sure the membrane is slightly relaxed at junctions (between walls & ceilings, corners, and floors) to accommodate expansion and contraction of the structure

Overlapping the membrane sheets

  • Overlap the next sheet of membrane using the guide marks on the intello
  • Using the dotted line to center the tape over the joint, tape the overlaps using TESCON VANA tape
  • The adhesive is pressure activated, so activate the tape by pressing firmly with a PRESSFIX tool

Counter-Battens a.k.a ‘The Service Cavity’

  • Battens help ensure long-term airtightness of the assembly
  • Holds up the weight of insulation, especially in ceilings
  • Creates gap between finish layer and air barrier where you can run utilities or add insulation
  • Space battens a maximum of 20” apart before insulation is blown in
  • Tape joints should not support the weight of insulation. Support tape joints two ways:
    • A) Support with battens applied directly over the tape joint, or
    • B) Reinforced with perpendicular strips of tape spaced less than 12” apart also known as ‘stitch taping’ (see minute mark 4:30 in video)

Floor Joint

  • Seal the membrane to the floorboard using CONTEGA HF adhesive caulk

Wall Penetrations

  • Light switches and outlets: use INSTAABOX to create an airtight cavity
    • adhere instaabox boxes to the membrane with TESCON VANA tape
  • Pipes: airseal with ROFLEX gaskets
  • Cables: airseal with KAFLEX air sealing sleeves

More Installation Videos:

, , ,

Tweet about this on TwitterShare on FacebookShare on LinkedInPin on PinterestEmail to someone

One Response to Installation instructions For Using INTELLO Plus In Wood Frame Buildings With Blow In Insulation

  1. Brian C September 13, 2017 at 1:07 pm #

    much improved over the previous install video. Great job!

Leave a Reply