Marietta commercial buildings in areas like Downtown Marietta and near Marietta Square often feature older flat roofs that collect standing water during the humid subtropical summers. High humidity accelerates membrane blistering and seam failure on TPO and EPDM systems, while mild winters still allow freeze-thaw cycles around roof drains and penetrations. Cobb County code requires positive drainage and specific wind-uplift ratings that change with building height and exposure near Kennesaw Mountain.
Roof replacement on commercial properties in Whitlock Heights or Forest Hills typically involves removing multiple layers of existing modified bitumen before installing new insulation and cover boards. Edge details around HVAC curbs and parapets must account for the heavy tree cover common in these neighborhoods, which drops debris that clogs scuppers and leads to interior leaks. Proper attachment methods differ between steel deck and concrete deck buildings found throughout the county.
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Leak repairs on commercial roofs in nearby Smyrna and Rosemont frequently trace back to flashing failures around skylights or pitch pockets that were never sealed for the region’s rainfall intensity. We inspect the entire drainage path rather than patching isolated spots because water often travels under the membrane for several feet before appearing inside the building.
Seasonal timing matters in Marietta because intense summer heat can soften adhesives during installation, while the drier fall window allows better adhesion for cold-applied systems. We schedule work around these patterns to avoid callbacks that occur when materials are installed outside their temperature range.
Technician insight
In Marietta the thing that catches most people out with commercial roofing is how quickly humidity and tree debris combine to clog scuppers on buildings near Marietta Square and Glover Park. Older flat roofs in Cobb County often have multiple layers that trap moisture, so skipping a proper moisture scan before re-covering leads to blisters within two summers.
TPO Replacement on Downtown Marietta Office Building
Standing water had formed along the back parapet of a two-story office building near Marietta Square. We found saturated insulation under the existing EPDM and failed flashing at three HVAC curbs. We removed the wet material, installed new tapered insulation for positive drainage, and heat-welded a new 60-mil TPO system with reinforced perimeter details.
Commercial Roofing Services We Offer
✓TPO Membrane Replacement
Heat-welded TPO systems installed over new insulation on commercial flat roofs to resist UV and ponding water common in Marietta summers.
✓Modified Bitumen Repair
Torch-down or cold-applied modified bitumen patches and full replacements that restore waterproofing around HVAC units and parapets.
✓Commercial Roof Coating
Elastomeric coatings applied to extend the life of existing metal and membrane roofs while reflecting heat in Cobb County’s hot summers.
✓Drainage and Scupper Installation
New primary and secondary drains plus scuppers added to correct standing water issues on older commercial buildings near Glover Park.
✓Metal Panel Roofing
Standing seam and screw-down metal systems for sloped commercial structures in Forest Hills and Whitlock Heights that need wind resistance.
Commercial Roofing Cost in Georgia
| Service | Typical Range | What Affects It |
|---|---|---|
| TPO Membrane Replacement | $6–$12 per sq ft | Varies with insulation thickness and number of existing layers |
| Modified Bitumen Overlay | $4–$8 per sq ft | Lower cost when deck is sound and only one layer exists |
| Commercial Roof Coating | $2–$4 per sq ft | Depends on surface prep and number of coats required |
| Drainage Upgrade | $800–$2,500 per drain | Includes new scupper or internal drain and tie-in to membrane |
Ranges are typical for Georgia and confirmed with an exact written quote before any work starts.
How it works
- 1
On-Site Inspection
We walk the entire roof, check deck condition, document penetrations, and test drainage on your Marietta commercial building.
- 2
Material And Code Review
We match insulation R-value, membrane type, and attachment method to Cobb County requirements and the building’s specific deck and slope.
- 3
Removal And Preparation
Existing layers are removed where needed, wet insulation is replaced, and the deck is prepared for proper adhesion or mechanical attachment.
- 4
Installation And Edge Details
New membrane or panels are installed with sealed seams, flashings, and drainage components completed before final inspection.
Pricing
Upfront written quotes after inspection; price depends on roof size, existing layers, and chosen system.