Rancho Peñasquitos, San Diego Roof Replacement | Owens Corning Duration Cool Sand Castle
July 2026
🚨 TWO ROOFS WERE HIDING UNDER THIS ONE. From the street, this Rancho Peñasquitos home looked like a typical roof replacement. Once we started tearing it off, we found something many homeowners never expect... Two complete layers of shingles. At first glance, installing new shingles over old ones sounds like a way to save money. In reality, the only significant savings usually come from avoiding the tear-off and disposal. The new shingles, underlayment, flashings, ventilation, labor, and accessories still have to be purchased and installed. Even more important, most major shingle manufacturers do not provide the same warranty coverage when their shingles are installed over an existing roof instead of a properly prepared roof deck. An overlay also traps additional heat because the new shingles cannot dissipate heat as effectively. More heat can accelerate granule loss, increase shingle aging, and cause the fiberglass mat to become exposed much sooner than expected. Instead of paying for a roof that could last decades, homeowners often end up paying for another replacement years earlier. That's why we removed both roofing layers, inspected the roof deck, installed Titanium 30 synthetic underlayment, and finished the home with Owens Corning Duration Cool architectural shingles in Sand Castle. Sometimes the least expensive decision isn't the one with the lowest price today. It's the one you only have to pay for once.
Owens Corning Duration Cool Architectural Shingles – Sand Castle, Titanium 30 Synthetic Underlayment, CertainTeed SwiftStart Starter Shingles, Ridge Cap Shingles, Drip Edge Flashing, New Roof Flashings, Shingle Roof Replacement, Rancho Peñasquitos Shingle Roof Replacement
Rancho Peñasquitos, San Diego Roof Replacement | Owens Corning Duration Cool Sand Castle
🚨 TWO ROOFS WERE HIDING UNDER THIS ONE. From the street, this Rancho Peñasquitos home looked like a typical roof replacement. Once we started tearing it off, we found something many homeowners never expect... Two complete layers of shingles. At first glance, installing new shingles over old ones sounds like a way to save money. In reality, the only significant savings usually come from avoiding the tear-off and disposal. The new shingles, underlayment, flashings, ventilation, labor, and accessories still have to be purchased and installed. Even more important, most major shingle manufacturers do not provide the same warranty coverage when their shingles are installed over an existing roof instead of a properly prepared roof deck. An overlay also traps additional heat because the new shingles cannot dissipate heat as effectively. More heat can accelerate granule loss, increase shingle aging, and cause the fiberglass mat to become exposed much sooner than expected. Instead of paying for a roof that could last decades, homeowners often end up paying for another replacement years earlier. That's why we removed both roofing layers, inspected the roof deck, installed Titanium 30 synthetic underlayment, and finished the home with Owens Corning Duration Cool architectural shingles in Sand Castle. Sometimes the least expensive decision isn't the one with the lowest price today. It's the one you only have to pay for once.