The Problem:

A homeowner in Roslyn, NY contacted Zavza Seal about an active roof leak coming from the front dormer. Water was entering at the valley joint where two roof sections meet. The leak was slowly spreading moisture into the wall below the window area.

The homeowner noticed water stains forming inside the home after heavy rain. The valley joint had old, cracked sealant that was no longer protecting the seam. The horizontal joint under the dormer window was also exposed and vulnerable to water penetration.

Roof valleys are one of the most common leak areas because they collect and direct a large amount of rainwater. According to the National Roofing Contractors Association, roof valleys must be properly sealed and maintained to prevent water intrusion. When sealant fails, water can quickly find its way inside.

If left untreated, this type of leak can lead to wood rot, mold growth, and interior damage.

The Solution:

Our team at Zavza Seal created a clear and simple repair plan to fully waterproof the valley joint and protect the dormer area.

Here is what we did:

• We cleaned out the entire valley joint from the top ridge of the roof peak down to the window level.
• We continued across the lower roof area, covering approximately 8 linear feet of the horizontal joint under the dormer window.
• We removed loose debris and failed sealant to prepare the surface for a strong bond.
• We pumped in new high quality sealant along the entire length of the repair to completely glut and waterproof the joint.
• We tooled the sealant to create a smooth and neat finish for long term durability.
• Any stucco finish that was disturbed during the process was carefully touched up to match the existing material.
• We used a colored sealant that blends with the roof and wall colors so the repair looks clean and natural.
• This process restored the waterproof barrier and sealed the most vulnerable areas of the dormer roof.

The Result:

After the repair, the valley joint and horizontal seam were fully sealed and protected against future water intrusion. The homeowner immediately felt peace of mind knowing the leak was properly addressed.

No more water stains. No more active leaks during rainstorms.

The repair blended in with the existing roof and stucco, keeping the home’s curb appeal intact. Most importantly, the structure underneath is now protected from further moisture damage.

Proper roof maintenance is essential for protecting your home. The Federal Emergency Management Agency also highlights the importance of sealing roof penetrations and joints to reduce the risk of water damage.

Why Homeowners in Roslyn, NY Choose Zavza Seal?

• Experienced in dormer and valley leak repairs
• Clean and detailed workmanship
• Color matched finishes
• Long lasting waterproof solutions
• Honest and simple communication

If you are dealing with a roof leak in Roslyn, NY, especially around a dormer or roof valley, Zavza Seal is ready to help. We focus on stopping the leak at the source and protecting your home for the long term.