New Roof Installation in Marietta, GA for Builds and Additions
New roof installation is different from a replacement. There's no tear-off, no decking surprises, no pre-existing ventilation to fix. The slate is clean. Which means there's nothing in the way of doing it right from the deck up. That's how we approach every new install in Marietta, GA and across Cobb County.
Whether it's new construction, a major addition, a workshop, or a detached garage, we install the full system. Synthetic underlayment, ice-and-water shield in the critical spots, drip edge, starter, lifetime architectural shingles or standing seam metal, and continuous ridge ventilation sized to the attic. Same install standards as our replacement work, just without the tear-off.
Where We Get Called for New Roof Installation
New construction homes
Cobb County keeps growing. We work with general contractors on custom homes and small infill builds. Scheduled to your project timeline so we don't hold up framing or interior trades.
Additions tied into existing roofs
Adding a primary suite, a sunroom, a bonus room above a garage. The hard part is tying the new roof into the old one cleanly. We step-flash, weave shingles, and tie underlayment so the seam is invisible from the curb and watertight from above.
Detached structures
Garages, workshops, pool houses, carports, sheds. Often paired with the main house re-roof so we're already on site with the same materials.
The System We Install on Every New Roof
Synthetic underlayment
Full coverage synthetic, lapped to manufacturer spec, fastened with cap nails. Tougher than felt, doesn't wrinkle in Georgia heat, real secondary waterproofing.
Ice and water shield at penetrations and valleys
Self-adhered membrane in every valley, at the eaves, around every penetration, and along every wall transition. Belt-and-suspenders waterproofing where it counts.
Drip edge and starter strip
Aluminum drip edge along eaves and rakes. Sealed starter strip at the bottom course so the first row of shingles is glued down properly.
Lifetime architectural shingles or 24-gauge standing seam metal
GAF Timberline HDZ or CertainTeed Landmark Pro for shingles. 24-gauge standing seam with Kynar 500 finish for metal. Both come with manufacturer warranties of 30+ years on shingles or 30+ years on factory finish for metal.
Continuous ridge ventilation, balanced with soffit intake
Net free vent area calculated against attic square footage. Soffit intake at the eaves, ridge exhaust at the peak. Without this, even the best shingles fail early.
How We Tie New Roof Into Existing Roof on Additions
This is where most additions show their work. Bad tie-ins look like a patch on the roof. Good tie-ins are invisible. We weave new shingles into the existing field for at least three full courses, step-flash any new wall transitions, and tie the underlayment together rather than overlapping it. If the existing shingles are still in production, we color match. If not, we blend with the closest current run.
What New Roof Installation Costs in Cobb County
Architectural shingles run $4.50 to $7.00 per square foot installed in Cobb County. Standing seam metal runs $10 to $16 per square foot installed. We give a written quote with the full system specified and a clear timeline before any work starts.
Get a New Roof Installation Quote
Call (678) 720-3565 or use the contact form. Free site visit, builder coordination, and a written quote within 48 hours.