INSTALL GUIDES: Roofing
Use: Prodex 48 Inch, Fast Action, 62 Inch Fast Action, 72 Inch or 10M
Equipment checklist: Reflective tape, utility knife, staple or screw gun.
Properly insulating your roof is essential for maintaining energy efficiency, preventing moisture issues, and ensuring year-round comfort. With multiple insulation options available—fiberglass, rigid board, spray foam, and reflective insulation—choosing the right product can be challenging. This guide will help you understand how to insulate a roof effectively while highlighting why Prodex Total is the superior choice.
How to Insulate a Roof: The Best Solution for Maximum Efficiency
Location 1: Insulation is draped over the trusses. Allow insulation to sag 2 inches or more. Apply decking.
Location 2: Install insulation directly on decking. Apply 1"x3" furring strips on top of insulation. Install tiles.
Location 3: Install insulation directly on decking or shingles. Apply 1"x3" furring strips on top of insulation. Install metal roof. Learn about the challenges metal roof insulation must address.
Best Roof Insulation Options Compared
Fiberglass Insulation
Fiberglass batts and rolls are commonly used in roof insulation. While they offer decent thermal resistance (R-value), they have several drawbacks:
✔ Pros: Readily available, affordable, non-combustible
❌ Cons: Absorbs moisture, prone to mold growth, requires vapor barriers, deteriorates over time
Rigid Board Insulation
Rigid foam board (Polyiso, XPS, EPS) provides good insulation and structural support. However, it also comes with limitations:
✔ Pros: High R-value per inch, moisture-resistant
❌ Cons: Difficult to install around irregular roof structures, can degrade in extreme temperatures, costly
Spray Foam Insulation
Spray foam (open-cell and closed-cell) expands to fill gaps, creating an airtight seal. While effective, it has significant downsides:
✔ Pros: High R-value, air-sealing properties
❌ Cons: Expensive, off-gasses chemicals, requires professional installation, not easily removed.
Why Prodex Total is the Best Roof Insulation
Higher Energy Efficiency
Unlike fiberglass or rigid board, Prodex Total reflects 97% of radiant heat, keeping your home cooler in summer and warmer in winter.
100% Waterproof
Prevents mold, mildew, and condensation issues that are common with fiberglass and spray foam.
Multi-Layer Protection
Combines a reflective radiant barrier, insulating foam core, and moisture barrier in one product.
Easier Installation
Lightweight and flexible, it installs easily over or under rafters without specialized tools.
Cost-Effective & Long-Lasting
Outperforms traditional insulation at a fraction of the long-term cost, with no risk of deterioration.
Final Verdict: The Smartest Choice for Roof Insulation
When comparing insulation options, Prodex Total stands out as the most effective, durable, and cost-efficient solution. Unlike fiberglass, it doesn't trap moisture. Unlike rigid board, it flexes to fit all roof designs. Unlike spray foam, it installs easily without toxic chemicals.
For the best performance in roof insulation, choose Prodex Total—the insulation that delivers maximum efficiency, moisture control, and long-term savings.
Ceiling Install
Metal Building Roof Install
Learn more about the unique challenges of insulating metal roofs.
