When you hire a contractor to install a $30,000 roof or a $40,000 siding job, the manufacturer’s certification of that contractor is one of the few real third-party signals you have. Manufacturers don’t certify everyone — in some programs (like GAF Master Elite), only the top 2–3% of roofing contractors in the country hold the credential. The certification process usually requires years in business, licensed and insured status, customer reviews and references, and ongoing training.

More practically: manufacturer certifications unlock warranties that aren’t available to non-certified installers. For example, GAF’s Golden Pledge warranty — which covers labor as well as materials for 25 years — is only available when the roof is installed by a Master Elite contractor. Same with CertainTeed’s SureStart PLUS, James Hardie’s ColorPlus finish coverage at the highest tier, and others. When you hire a non-certified installer, you’re leaving warranty value on the table whether you realize it or not.

Here are the certifications we currently hold, organized by service.

Roofing certifications

GAF
Master Elite

GAF Master Elite Certified

GAF’s top-tier roofing contractor designation. Approximately 2–3% of roofing contractors in North America hold the Master Elite credential. Required for installation of GAF’s Golden Pledge warranty, which covers labor and materials for up to 25 years.

Why it matters: Stronger labor coverage on your roof — not just the shingles.

CertainTeed
5 Star Contractor

CertainTeed 5 Star Contractor

CertainTeed’s top consumer-facing contractor designation. Required for installation of CertainTeed’s SureStart PLUS warranty, which extends material and workmanship coverage well beyond the standard manufacturer terms.

Why it matters: Extended warranty coverage on CertainTeed shingles only available through 5 Star installers.

Atlas
Pro Select

Atlas Pro Select Roofing Installer

Atlas Roofing’s certified installer designation. Atlas manufactures the StormMaster impact-resistant shingle line and the Pinnacle Pristine series with Scotchgard Protector.

Why it matters: Access to Atlas’s extended workmanship warranty programs and product-specific install standards.

Siding certifications

James Hardie
Alliance Preferred

James Hardie Alliance Preferred Contractor

James Hardie’s contractor program for installers committed to Hardie’s strict installation standards. Required to register the ColorPlus 15-year finish warranty and to maintain the full 30-year non-prorated substrate warranty.

Why it matters: Without certified installation, the Hardie warranty terms can be reduced or voided.

LP SmartSide
Certified Installer

LP SmartSide Certified Installer

Louisiana-Pacific’s certified installer designation for SmartSide engineered wood siding. Required for proper installation per the SmartSide warranty terms (including the 5-year 100% labor and material replacement coverage and the 50-year prorated substrate warranty).

Why it matters: Improper installation is the most common reason LP warranties are denied. Certified install closes that gap.

VSI
Certified Installer

VSI Certified Installer

Vinyl Siding Institute certification — the industry-wide credential for vinyl siding installation. VSI’s certified installer program tests installers on proper preparation, fastening, expansion gaps, and trim integration per ASTM standards.

Why it matters: Vinyl siding looks simple but is the material most commonly installed wrong. VSI certification verifies you’re getting it done right.

Window certifications

Andersen
Premier Contractor

Andersen Windows Premier Contractor

Andersen’s contractor designation for installers of Andersen’s 400 Series, A-Series, and E-Series window lines. Andersen is one of the most respected window manufacturers in the country for higher-end homes and historic restoration work.

Why it matters: Andersen warranty registration and proper installation standards for premium and architectural windows.

Cornerstone Brands
Premier Contractor

Cornerstone Building Brands Premier Contractor

Cornerstone Building Brands is the parent company of Mastic, Simonton, Ply Gem, and several other major exteriors brands. The Premier Contractor designation applies across the portfolio, covering both vinyl siding and replacement windows.

Why it matters: Multi-brand certification across one of the largest exterior product families in North America — including the Simonton and Mastic products we install most often.

What this means when you hire us

Certifications don’t replace good workmanship. A certified contractor who cuts corners is still a contractor cutting corners. But certification is one of the cleanest third-party signals available, and the warranty access alone is worth thousands of dollars over the life of a roof or siding installation. Whichever material you choose, when we install it, you get the manufacturer’s strongest warranty tier — not the watered-down version.

If you’re vetting other Knoxville contractors and want to compare, here’s a short checklist:

Want a quote with the full manufacturer warranty?

Whichever product line you’re considering, we’ll register your installation for the strongest manufacturer warranty tier available. Free in-home estimate, written quote good for 90 days, no pressure to decide on the spot.

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