JMD Construction | Roofing Services in Port Jefferson, NY 11777

Overflowing gutters often signal improper drainage or leaks in the roof system itself, allowing water to seep into your home's structure. Our moisture control repair service addresses these hidden leaks and water pathways in your roof deck, attic, and walls. By sealing these entry points and improving ventilation, we stop the moisture at its source, which reduces the burden on your gutters and protects your home's foundation and siding from water damage common in our coastal climate.

Granule loss exposes the asphalt layer of your shingles to UV rays and moisture, accelerating wear. While shingle replacement may eventually be needed, a professional waterproofing installation beneath your roofing layers is a crucial protective measure. We install high-grade underlayment and membranes that create a secondary barrier. This shields your roof deck and interior from leaks, even if shingles are compromised, buying you time and providing essential protection against Long Island's rain and humidity.

For masonry or concrete foundations in Port Jefferson, waterproofing repair starts with a thorough inspection to find cracks, porous areas, or failed previous sealants. We then clean and prepare the surface before applying specialized, penetrating sealants or installing exterior drainage membranes. This process stops water intrusion that can cause basement dampness, mold, and structural weakening. It's a targeted repair that addresses the root cause, complementing your roof and gutter system to keep your entire home dry.