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COMMERCIAL ROOF REPLACEMENT

Black Metal and TPO Roof Replacement With Rotted Decking Repair in South Congress, Austin, TX 78704

An aging, heavily patched asphalt roof was replaced with black metal and TPO—and tear-off revealed $4,500 in necessary decking repairs.

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Roofing contractors in Austin, TX
Years
20 +

Why Austin Homeowners Choose Driftwood Builders Roofing

We’re not a franchise. Not a storm chaser. We’re a family-built roofing company that has called Central Texas home for over 20 years — and we’re still here because we do the job right.

Flat, dark rooftop with several puddles reflecting the cloudy sky and surrounding trees; power lines cross the scene.

Project Overview

Driftwood Builders Roofing completed a commercial roof replacement near South Congress in Austin, Texas. The existing sloped roof used aged asphalt shingles with extensive granule loss, exposed asphalt, roof cement, and repeated patching. The low-slope section also showed standing water and an older roof surface that required replacement.


The original $18,000 scope included tear-off, new roofing materials, complex installation work, a black metal roofing system on the sloped areas, and TPO on the flat section. Once the old roof was removed, the crew discovered widespread rotted and open decking. Correcting those concealed conditions added $4,500, bringing the final project investment to $22,500.


The finished roof combines clean black metal panels with a dedicated TPO system for the low-slope area. The project also included integration of rooftop penetrations and ventilation, cleanup, and final quality-control review.

Project Details

GAF Timberline HDZ Roof Replacement at 12100 Emerald Oaks Drive

Detail Amount
Location South Congress, Austin, TX 78704
Property Commercial
Roof system Black metal + TPO
Timeline Approx. 2–3 days
Original scope $18,000
Final investment $22,500

What Is the Black Tar on an Older Austin Roof?

ROOF CEMENT AND REPEATED PATCHING

WHY WAS SO MUCH BLACK ROOF CEMENT VISIBLE?

Black roofing tar is commonly roof cement used around penetrations, seams, flashings, and temporary repairs. It can be useful when applied correctly for a suitable detail, but widespread surface application often indicates repeated attempts to manage deterioration or water entry. It is not a permanent substitute for sound decking, correct flashing, and a roof system suited to each slope.
Open hole in a damaged roof with exposed wood and torn underlayment; a sneaker rests at the edge nearby.

ROOF REPLACEMENT COST

Why the Roof Was Replaced

The before-condition photos show an asphalt roof near the end of its practical service life, with widespread granule loss, exposed asphalt, aging accessories, and extensive roof-cement repairs. These visible conditions supported full replacement rather than another isolated patch. Tear-off was also necessary to evaluate the roof deck and create a reliable foundation for the new systems.

Scope of Work – Metal and TPO Roof Replacement

The completed roof replacement scope included the following work:

Why Rotted Decking Added $4,500

Decking is the structural surface beneath the visible roofing. Existing shingles and underlayment can conceal moisture-related deterioration, open holes, and weakened wood. On this project, those problems became clear only after tear-off. Installing a new metal or membrane roof over unsound decking would have compromised fastening, transitions, and long-term performance, so the damaged areas had to be corrected first.

The decking work was a documented hidden-condition change of $4,500. That addition increased the original $18,000 roof scope to a final project investment of $22,500.

Person wearing a pink shirt and jeans walks along a rooftop with corrugated metal panels, city streets and trees in the background.

Before Photos

The original commercial roof showed extensive age-related deterioration and repeated attempts to manage problem areas with roof cement and patches.

During Photos – Rotted Decking Discovered

Tear-off exposed widespread deterioration, holes, and unsuitable decking. The low-slope area also showed standing water that reinforced the need for a properly detailed replacement system.

After Photos

The completed sloped roof uses clean black exposed-fastener metal panels with integrated turbine vents. A dedicated TPO system was installed on the low-slope section.

How Much Did This South Congress Commercial Roof Cost?

The original proposal totaled $18,000. Rotted decking discovered during tear-off added $4,500, bringing the final project investment to $22,500.
Project Scope Investment Amount
Tear-off and disposal $1,200
Metal roofing materials, underlayment, and accessories $10,000
Complex roofing installation labor $3,800
TPO replacement on low-slope section $3,000
Original roof-replacement scope $18,000
Rotted decking repairs discovered during tear-off $4,500
Final project investment $22,500

Important Pricing Disclaimer

This pricing applies only to this commercial property and the documented project scope. Roofing costs vary with measured area, access, slope, structural conditions, panel and membrane specifications, rooftop equipment, drainage, permitting, disposal, labor, and conditions discovered during tear-off. The $4,500 decking addition was specific to concealed deterioration found on this project.

What Our Customers Say

We are large enough to get the job done right, yet small enough to provide old-fashioned customer service. Here is real feedback from the South Austin homeowner whose clay tile roof we repaired (roof inspection and roof repair, in the $18,000–$20,000 range).

J Brown
“What a fantastic company! I did a lot of shopping for a roof replacement for our commercial property on South Congress and Driftwood Builders far and beyond was the most affordable and most attentive.”

How Our Roof Replacement Works

1. Free Inspection & Estimate

We inspect the full roof and assess the shingles, decking, flashing, and ventilation, then provide a free, no-obligation estimate.

2. Honest Recommendation

We tell you honestly whether a targeted repair or a full replacement is the right long-term value for your home, with no pressure.

3. Tear-Off & Installation

We protect your property, tear off the old roof, inspect and repair the decking, and install a new architectural asphalt shingle system per manufacturer specifications.

4. Final Check & Cleanup

We verify flashing, ventilation, and workmanship, complete a magnetic nail sweep, and finish with a final quality-control inspection.

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Roofing Tips & Education

Frequently Asked Questions

What is the black tar on an older roof?
It is usually asphalt roof cement used for repairs around seams, penetrations, flashings, or deteriorated areas. Widespread use may indicate repeated patching rather than a lasting correction.
The shingles showed extensive granule loss, exposed asphalt, aging accessories, and substantial prior patching. The low-slope area also required a roof system designed for that condition.

The shingles and underlayment concealed much of the wood. Complete conditions became visible only after the old roof materials were removed.

A sound deck is needed for secure fastening, stable transitions, and a reliable roof assembly. Open or weakened wood cannot provide an acceptable foundation.

The hidden-condition decking work added $4,500 to the original $18,000 scope.

What was the final project cost?
The final project investment was $22,500.
Metal provides a durable finished surface and a clean commercial appearance when installed over a properly prepared deck with correctly integrated details.
TPO is a membrane roofing option commonly used where the roof geometry calls for a low-slope system rather than a steep-slope shingle or metal detail.
Yes. The customer identified the South Congress property as commercial in the supplied review.
The customer’s review states that Driftwood Builders Roofing did not collect payment until the work was completed. Contract terms should always be confirmed for each project.

Commercial Roofing Services Near South Congress

Driftwood Builders Roofing provides commercial roof inspections, roof replacement, metal roofing, TPO and other low-slope roofing solutions, decking repairs, ventilation, flashing, and storm-damage documentation throughout Austin and Central Texas. Businesses and property owners in South Congress, SoCo, and ZIP code 78704 can request an inspection and detailed proposal based on site-specific measurements and conditions.

Rooftop with torn shingles and debris scattered across a sloped surface, a man standing near the edge inspecting damage.
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