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Johns Manville Technical Blog — Insulation & Roofing Insights

In-depth articles on insulation R-values, roofing system selection, energy code compliance, and building envelope best practices from our team of product engineers and technical specialists.

Technical Blog

Johns Manville Formaldehyde-Free Fiberglass Insulation: Why It’s the Top Choice for Prairie Village, KS Projects

As an office administrator who manages insulation orders for commercial projects, I explain why Johns Manville's formaldehyde-free fiberglass insulation is a reliable choice, what to watch out for, and how other considerations like Schluter trim, painting vinyl siding, and even a Newsboy cap fit into the bigger picture. [...]

Technical Blog

Johns Manville Insulation & Roofing: A Pre-Install Checklist for Homeowners with Stained Glass Windows, Shower Valves, and Old Wallpaper

Wish you'd known about these 6 common pitfalls before starting your insulation project? I've been there. This checklist covers the unexpected challenges—from stained glass windows to shower valve placement—that can derail your Johns Manville roofing or insulation upgrade. Learn from my $2,000 mistake. [...]