How J-Channel Gaps Can Cause Leaks and What to Do

How J-Channel Gaps Can Lead to Leaks and What to Do About It

When replacing a roof, it’s essential to address potential issues at the roof-wall intersection, such as gaps caused by a J-channel sitting too high. At Mattsson Roofing, we recently encountered this problem during a project in Bergen County, NJ. Here’s how we resolved it and what homeowners need to know to prevent leaks in these critical areas.

The Problem: J-Channel Sitting Too High

In this case, the J-channel—a siding component used to hold edges—was sitting far too high above the roof surface. This happened because the roof previously had two layers of shingles. When the old roof was torn off and replaced with just one layer of shingles, a pronounced gap was left between the roof and siding.

Why This Happens

Multiple roofing layers can disrupt the alignment of key components like siding, flashing, and the roof itself, leaving gaps vulnerable to water infiltration.

Risks of Ignoring It

These gaps can allow water to seep into the home, causing leaks, mold, and structural damage.

The Solution: Proper Waterproofing at Roof-Wall Intersections

Here’s how we addressed the issue to ensure the home was fully protected:

• Removing the Extra Layer of Shingles: We eliminated the second layer of shingles to prevent any unnecessary buildup at the intersection points.
• Taking Off the Siding: The siding around the affected area was removed to allow for thorough waterproofing.
• Installing Ice and Water Shield: A layer of ice and water shield was applied from the roof surface up the wall. This acts as a waterproof barrier to prevent any water penetration.
• Adding Step Flashing: Step flashing was installed on top of the ice and water shield, ensuring a secure and watertight connection between the roof and the wall.
• Reattaching the Siding: Once the waterproofing measures were in place, the siding was carefully reinstalled for a seamless finish.

Why Proper Waterproofing Is Essential

The roof-wall intersection is one of the most vulnerable areas for water infiltration. Proper waterproofing ensures:

• Prevention of Leaks: No water can enter the home through gaps or weak points.
• Longevity of Roof and Siding: Prevents damage to roofing materials and siding components.
• Peace of Mind: Homeowners can trust their roof is built to last and withstand the elements.

Why Choose Mattsson Roofing?

At Mattsson Roofing, we specialize in addressing complex roofing challenges like J-channel gaps and intersection waterproofing. Here’s why Bergen County homeowners trust us:

• Expertise in Roof-Siding Transitions: We understand the intricacies of roof-wall intersections.
• Comprehensive Waterproofing: Our team uses industry-best practices to ensure a watertight seal.
• Commitment to Quality: We prioritize long-term solutions over quick fixes.

Protect Your Home from Roof Leaks Today

If you notice gaps between your roof and siding or have concerns about previous roofing work, let Mattsson Roofing provide the expertise you need. Contact u s at 201.925.9709 or CLICK HERE to schedule an inspection.