Johns Manville Insulation
Formaldehyde-Free Fiberglass Insulation Products
Johns Manville offers a complete line of certified formaldehyde-free™ fiberglass building insulation produced in Winder, Georgia. Their lineup goes beyond standard FSK-25 faced/kraft and unfaced batts to include specialty options that deliver comfort, energy savings, and clean indoor air.
Why Formaldehyde-Free Matters
- Healthier indoor air: no added formaldehyde; low VOCs.
- Comfort + efficiency: consistent thermal performance and sound control.
- Sustainability: contributes to LEED IEQ credits for low-emitting materials.
Available Facings & Formats
- FSK-25 faced, kraft faced, and unfaced batts
- Standard and high-density options
- Blow-in and spray-in methods for attics, walls, and crawl spaces
See more fiberglass options in our fiberglass insulation collection or browse our full insulation category.
Application Benefits
- Energy efficiency: helps reduce heating/cooling loads and monthly bills.
- Comfort: fewer drafts, better temperature balance room-to-room.
- Noise control: improved acoustic performance in walls and ceilings.
- Durability: maintains R-value when properly installed.
Pro Tips for Best Results
- Air-seal around windows, doors, outlets, and penetrations before insulating.
- Choose the right R-value for your climate zone and cavity depth.
- Install batts snugly without compression; avoid gaps and voids.
- Maintain attic ventilation to manage moisture and prevent mold.
Get Started with D7 Supply
We stock a wide range of Johns Manville fiberglass insulation along with accessories for clean, efficient installs. Our team can help you choose the right product for your project—whether new construction or retrofit.
👉 Shop fiberglass insulation or explore our complete insulation selection.
FAQs
Is Johns Manville insulation really formaldehyde-free?
Yes. JM’s formaldehyde-free™ products are designed for low VOCs and improved indoor air quality compared to traditional formulations.
What R-value should I choose?
Select R-values by climate zone and cavity depth (e.g., R-13 to R-21 for 2×4/2×6 walls; R-38+ for many attics). When in doubt, contact us and we’ll recommend options.
Can I DIY fiberglass insulation?
Walls and attics with standard cavities can be DIY-friendly. Use PPE (gloves, mask, goggles) and follow manufacturer instructions for cutting and fitting batts.
