When water begins dripping into a living space, the urgency to find a solution becomes the top priority for any homeowner. A resident in DeBary recently contacted us regarding an active leak coming from their residential skylight. While it is common to assume that an issue like this will only entail a localized repair or a simple window resealing, a comprehensive evaluation of the exterior quickly uncovered a much larger underlying problem. The property did not just have a failing skylight seal; it was burdened with two separate layers of aging asphalt shingles.
Roofs with multiple layers of materials present unique challenges and hidden liabilities, especially in demanding southern climates where intense heat and heavy rain are daily occurrences. The existing double layer meant that finding the exact source of the water intrusion was nearly impossible without performing a complete structural reset. To resolve the ongoing water damage and protect the home long-term, we executed a massive tear-off, removing both layers of old roofing down to the original plywood. We then installed a completely new skylight unit, a premium Owens Corning Duration shingle system, and a brand-new set of seamless gutters to manage the exterior drainage effectively.
The Hidden Liabilities of Multiple Shingle Layers
In previous decades, installing a second layer of shingles directly over an older, failing roof was a relatively common practice used to save time and reduce labor costs during a replacement. However, this method creates severe structural and environmental problems for the property over time. The most immediate issue is the sheer weight. Asphalt shingles are exceptionally heavy, and adding a second layer essentially doubles the dead load pressing down on the home’s wooden trusses and structural decking.
Furthermore, a double layer of roofing acts as a massive thermal blanket. It traps intense solar heat within the attic space, drastically increasing the temperature of the underlying plywood and baking the shingles from both the top and the bottom. This trapped heat accelerates the deterioration of the asphalt, causing the new layer to dry out, blister, and fail long before its intended lifespan. Most dangerously, a second layer completely obscures the true condition of the roof decking. When a leak occurs—such as the one around this specific skylight—water easily becomes trapped between the two layers of shingles. It migrates unpredictably, slowly rotting the wooden foundation out of sight until the structural damage becomes catastrophic.
Executing a Complete Structural Tear-Off
To properly address the failing skylight and the trapped moisture, a complete and aggressive tear-off was absolutely mandatory. Our crews arrived and began the heavy labor of stripping away both generations of old, degraded asphalt shingles. Removing two layers is a highly labor-intensive process that generates double the debris, requiring disciplined site management to protect the surrounding landscaping, the driveway, and the large screened pool enclosure located at the rear of the property.
Once the thousands of pounds of old material and saturated underlayment were removed, the bare plywood foundation was finally exposed. Exposing the deck is the most critical phase of any exterior restoration because it allows us to visually identify and replace any compromised wood. Around the leaking skylight, we found exactly what we expected: water had bypassed the old flashing, traveled between the two shingle layers, and saturated the decking. We cut out the rotted plywood and installed fresh, structurally sound decking, ensuring the new materials would have a perfectly stable, nailable surface.
Flawless Skylight Integration and Replacement
Skylights are incredible architectural features that bring natural light into dark interior spaces, but they are also major structural penetrations that require flawless waterproofing. The original skylight was failing because the old flashing system had completely deteriorated, and the glass unit itself had reached the end of its functional life. Attempting to save or patch an old skylight during a full roof replacement is a risky decision that almost always results in future callbacks and secondary leaks.
With the decking repaired and the opening properly framed, we installed a brand-new, energy-efficient skylight. By replacing the unit simultaneously with the surrounding roof, we were able to seamlessly integrate the new metal step flashing and self-adhering leak barriers directly into the skylight’s curb. This meticulous integration process completely seals the transition point, ensuring that heavy rainwater cascading down the slope is directed safely around the window rather than seeping underneath it.
Upgrading to Owens Corning Duration Shingles
With the foundation secured and the new skylight perfectly integrated, the home was ready for a massive material upgrade. We installed the Owens Corning Duration architectural shingle system across the entire property. After suffering through the accelerated wear of a two-layer system, the homeowner needed a highly durable, breathable, and weather-resistant surface that could withstand high winds and harsh ultraviolet exposure.
The Owens Corning Duration line is engineered specifically to handle extreme weather environments. These premium shingles feature advanced SureNail technology, which utilizes a highly visible, woven fabric strip embedded directly into the nailing zone. This proprietary feature provides an incredibly strong fastener hold, delivering industry-leading wind resistance to protect the property against severe storms and hurricane-force uplifts. Visually, the single, clean layer of dark dimensional shingles instantly modernized the home’s exterior. It added rich texture and striking shadow lines that contrast beautifully against the white exterior walls and the Tudor-style trim on the front gable, completely eliminating the bulky, uneven appearance of the previous double-layered installation.
Full Perimeter Gutter Installation
A high-performance roof sheds thousands of gallons of water during a heavy afternoon thunderstorm. To ensure that this massive volume of runoff does not pool around the home’s foundation or wash out the landscaping, a reliable drainage system is absolutely essential. Recognizing the importance of total water management, especially around the rear pool deck area, the homeowner requested that we handle the perimeter drainage alongside the replacement.
We custom-extruded and installed a completely new seamless gutter system around the eaves. By installing the gutters while the fascia was exposed and accessible during the roof job, we ensured the new drip edge flashing overlapped perfectly into the gutter channels. This critical detail prevents water from wicking backward behind the gutters and causing fascia rot. The new drainage system captures the rapid runoff from the smooth, single-layer surface and channels it safely away from the property.
Comprehensive Exterior Waterproofing
This comprehensive project perfectly illustrates why taking shortcuts on residential exterior work ultimately costs more in the long run. By completely removing the problematic double layer of shingles, replacing the failing structural penetrations, and upgrading the perimeter drainage, the property is now fully fortified against the elements. If your home is dealing with an active leak or you suspect an older layer of material is hiding beneath your current exterior, contact DeSantis Roofing at (321) 501-6220. We provide thorough, honest evaluations and deliver structural solutions that perform flawlessly for decades.
