Modified Bitumen Roofing: Aluminum Coating Application Explained

Modified bitumen roofing is a trusted choice for flat or low-slope roofs across Gainesville and surrounding areas. But if you're not applying an aluminum coating to it—you’re leaving protection and performance on the table.

Here’s what you need to know about why and how this simple step makes a major difference.

What Is Modified Bitumen Roofing?

Modified bitumen is a rolled roofing system made of asphalt combined with rubber or plastic modifiers. It’s a durable, flexible, and weather-resistant system commonly used for:

• Residential flat roofs

• Commercial buildings

• Additions like porches or sunrooms

At L&L Roofing & Construction, we often install these in places where shingles won’t work due to low slope or ponding concerns.

What’s the Purpose of Aluminum Coating?

Once the roof is installed, it’s still exposed to heat, UV rays, and daily weather cycles. That’s where aluminum coating comes in.

Aluminum roof coating does four key things:

1. UV Protection
   Stops UV rays from breaking down the asphalt over time. Without this barrier, the surface becomes brittle and prone to cracking.

2. Heat Reflection
   Reflects sunlight to reduce surface temperature—sometimes by 30°F or more. That’s energy savings and longer life for your roof.

3. Waterproofing Assist
   Seals small cracks or imperfections and slows down water absorption. It’s not a substitute for proper flashing, but it's a valuable layer of defense.

4. Extends Roof Life
   When applied correctly and maintained, aluminum coating can extend the life of a modified bitumen roof by up to 5–10 years.

When and How Should Aluminum Coating Be Applied?

Timing:

• Typically applied 6–12 months after roof installation

• Recoating is recommended every 3–7 years, depending on wear and tear

Conditions:

• Apply only during dry weather (ideally 50–90°F)

• Roof must be completely clean and dry

Steps We Follow at L&L Roofing:

1. Surface Prep:
   We remove debris, power wash the roof (if needed), and ensure all flashings are tight and sealed.

2. Inspection:
   Look for cracks, blisters, or areas that need spot repairs before coating.

3. Coating Application:
   Using professional-grade fibered aluminum asphalt coating, we roll or brush the material over the roof evenly.

4. Final Checks:
   We confirm consistent coverage, clean up all access areas, and review the results with you.

We only use aluminum coatings approved by the Asphalt Roofing Manufacturers Association (ARMA) and always follow safety and environmental best practices.

Is Aluminum Coating a DIY Job?

Not if you want it done right.

Homeowners often underestimate:

• Surface prep needs

• The thickness of coating required

• Risks of coating over leaks or soft spots

Improper application can trap moisture, cause peeling, and void warranties. We’ve seen it happen—and we’ve fixed the results.

FAQ

How much does aluminum coating cost?
Costs vary by roof size and prep needed. Most homeowners in Gainesville spend between $1.00–$2.50 per square foot for professional application.

How long does aluminum coating take to dry?
It usually dries to the touch in 24 hours, but full curing can take several days. We always check weather forecasts before scheduling.

Can aluminum coating stop a leak?
No. It helps protect a sound roof but won’t solve active leaks. Leaks need to be repaired before applying the coating.

Does this help with energy bills?
Yes. Reflective coatings reduce roof temperature and can lower cooling costs, especially in sunny Georgia summers.

Trust a Local Roofing Contractor with Integrity

At L&L Roofing & Construction, we don’t just do roofs—we protect homes and build relationships.

If your modified bitumen roof is aging, cracking, or just hasn’t been coated in a few years, it might be time to give it the care it deserves.

📍 Serving Gainesville, Cumming, Buford, Dahlonega, and beyond.
📞 Call us at (770) 874-0372
🔗 www.llroofs.com

Let’s do the right thing for your roof—because it’s the right thing to do.