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Spider® Plus Blow-In Custom Fiberglass Insulation

Spider® Plus Blow-In Custom Fiberglass Insulation

Johns Manville Spider® Plus Formaldehyde-Free™ blow-in fiberglass insulation uses interlocking fiber technology to fill all gaps and voids quickly with no adhesive or netting for a faster installation. Spider Plus provides complete coverage, with no shrinking or settling, resulting in superior thermal performance and sound control. Designed for use in wood- and metal-frame construction, engineered-wood construction and manufactured homes.

FEATURES:

  • Fast Drying - Dries immediately once installed.
  • Complete Coverage - Effective in tight spaces, areas with large amounts of cross-bridging or small gaps and voids.
  • Thermally Efficient - Effective resistance to heat transfer, with R-values up to R-25 in a 6'' cavity.
  • Formaldehyde-Free - Will not off-gas formaldehyde in the indoor environment.
  • Sound Control - Reduces sound transmission through exterior and interior walls, floor and ceiling assemblies.
  • Fire-Resistant - Flame Spread of 25 or less and Smoke Developed of 50 or less.
  • Resilient Inorganic Glass - No rotting, mildew or deterioration. Also noncorrosive to pipes, wiring and metal studs.

APPLICATIONS:

  • Thermal and Acoustical Insulation of Interior and Exterior Walls and Ceiling/Floor
  • Assemblies (with stud or joist cavities).
  • Wood-frame construction – residential homes and light commercial buildings
  • Metal-frame construction – residential and commercial buildings
  • Manufactured homes – modular or manufactured housing
  • Engineered-wood construction – assemblies framed with 12" to 19.2" on-center cavities.

PERFORMANCE ADVANTAGES:

  • Improves indoor air quality: because it’s made without formaldehyde.
  • Energy efficient: provides superior resistance to heat transfer with R-values up to R-23 in a 2x6 cavity.
  • Covers completely: gap-free coverage maximizes thermal and acoustical performance and minimizes air leakage where energy can escape.
  • Resilient: interlocking lightweight fiberglass prevents settling.
  • Controls sound: reduces transmission of sound through exterior and interior walls and floor/ceiling assemblies.
  • Easy to install: insulates a typical 2,700 sq. ft. home in 2–3 hours, twice as fast as other spray-in systems.
  • Mold and mildew resistant: fiberglass is naturally mold resistant.
  • Fire resistant and noncombustible: see Test Data.
  • Noncorrosive: does not accelerate corrosion of pipes, wiring or metal studs.
  • Durable: will not rot, mildew or otherwise deteriorate. JM Spider Plus insulation will not hold moisture or permanently lose R-value.
  • Fast drying: requires less moisture than other spray-in systems during installation and dries immediately when installed as recommended.
Technical specification
  • Unique ref.spider-plus-blow-in-custom-fiberglass-insulation
  • Product familyBuilding Materials
  • Product groupInsulation
  • TypeObject (single object)
  • Date of publishing2026-07-15
  • Edition number1
Related
  • Designed inUnited States
  • Manufactured inUnited States
Classification
  • BIMobject CategoryConstruction Materials - Insulation

Region availability

North America
Anguilla
Antigua and Barbuda
Aruba
Barbados
Belize
Bermuda
British Virgin Islands
Canada
Caribbean Netherlands
Cayman Islands
Collectivity of Saint Martin
Costa Rica
Cuba
Curaçao
Dominica
Dominican Republic
El Salvador
Greenland
Grenada
Guadeloupe
Guatemala
Haiti
Honduras
Jamaica
Martinique
Mexico
Montserrat
Nicaragua
Panama
Puerto Rico
Saint Kitts and Nevis
Saint Lucia
Saint Pierre and Miquelon
Saint Vincent and the Grenadines
Saint-Barthélemy
Sint Maarten
The Bahamas
Trinidad and Tobago
Turks and Caicos Islands
U.S. Virgin Islands
United States
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