Yes—insulation can be added to a modified bitumen roof, and it’s one of the best ways to improve energy efficiency and comfort. At L&L Roofing & Construction, we design roof systems in Gainesville that not only protect your property but also help reduce heating and cooling costs year-round.
Types of Insulation Used with Modified Bitumen
- Polyiso (Polyisocyanurate): The most common choice, offering high R-value per inch and excellent thermal performance.
- EPS (Expanded Polystyrene): A cost-effective option with consistent insulation value.
- XPS (Extruded Polystyrene): Strong, moisture-resistant boards ideal for areas where ponding water may occur.
Benefits of Adding Insulation
- Energy Savings: Lowers utility bills by keeping indoor temperatures more stable.
- Code Compliance: Meets or exceeds Georgia energy code requirements for flat roofs.
- Improved Comfort: Helps maintain consistent temperatures in both homes and businesses.
- Roof Performance: Creates a smooth, stable base for the modified bitumen system.
FAQ: Can You Add Insulation to a Modified Bitumen Roof?
Q: Is insulation installed above or below the roof deck?
A: Typically above the deck, directly beneath the membrane, to maximize energy performance.
Q: Will adding insulation increase the roof’s weight?
A: Slightly, but most structures easily support the added load from insulation boards.
Q: Can insulation help with drainage?
A: Yes. Tapered insulation can be used to create slope, helping eliminate ponding water on flat roofs.
Q: Does more insulation mean higher upfront cost?
A: Yes, but it pays for itself over time through energy savings and increased comfort.
At L&L Roofing & Construction, we believe in honesty, integrity, and doing the right thing. That means building roof systems that not only last but also make your property more energy efficient.
Call us today at (770) 874-0372 to schedule a consultation and learn how insulation can improve your modified bitumen roof in Gainesville and surrounding areas.