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Johns Manville Insulation

More than just a roof over your head, your home is where you relax, play and live. Make yours as comfortable and energy efficient as possible. When you install insulation, you invest in comfort and savings for your family and the life of your home. It’s all about being comfortable in your home. And Johns Manville insulation products offer a variety of easy, cost-effective ways to achieve that goal. When your home stays cooler in the summer and warmer in the winter, your HVAC system runs more efficiently and can last longer. You’ll save money, use less energy and add value to your home.

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Introducing Johns Manville Spider® Plus Blow-in Insulation- Next-generation blow-in insulation system features new “Interlocking Fiber Technology”

Spider Plus is designed for installation by professionals using a blowing wool machine and features “Interlocking Fiber Technology,” JM’s latest building science innovation. Interlocking Fiber Technology allows the insulation fibers to spring and lock into cavities with no adhesive or netting. JM Spider Plus achieves an R-value of 15 in a 2x4 cavity and an R-23 in 2x6 walls.

Additional performance advantages include:

Smart engineering: Interlocking Fiber Technology expands into wall and overhead cavities, filling gaps and voids, and creating a shield against elements to achieve Grade 1 installation.

  • Flexible installation: Installs and dries quickly for same-day drywall installation – saving time and money.

  • Clean: Minimal dust and easy clean up on job sites compared to other spray-in systems.
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Johns Manville makes a variety of insulation types for every part of your home:


Fiber Glass Batts and Rolls: available in different thicknesses, R-values and widths to accommodate standard-size walls, crawl spaces, attics and more. Additionally, our different product offerings help make installation easier.

  • Blow-in Loose Fiber Glass: Typically used in unfinished attics, nonconforming spaces and hard-to-reach areas such as corners, edges and around framing. Requires a blowing machine for installation.

  • Spray Foam: This alternative to fiber glass is most commonly used in new construction. It is applied using a specific spray applicator resulting in a thermal, air and moisture barrier. JM provides a variety of closed-cell and open-cell spray foam solutions to meet specific building and climate needs.

  • Mineral Wool: Specifically designed to deliver robust sound dampening, exceptional fire resistance and superior temperature control, it is most commonly installed in wood-stud cavities of interior and exterior walls, basements, ceilings, floors and crawl spaces.

  • Foam Sheathing: Rigid-foam-sheathing insulation for use in commercial and residential construction where continuous insulation and/or high thermal efficiency is required. JM provides sheathing solutions for both interior and exterior applications.

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