Project Overview

Location: Patchogue, NY
Client Need: Structural repairs, waterproofing, and energy efficiency improvements in a deteriorating crawl space.
Scope of Work: Replacement of seven rusted Lally columns, creation of a new crawl space entrance, installation of a drainage and sump pump system, membrane sealing, and ceiling insulation.

A homeowner in Patchogue, NY, contacted Zavza Seal LLC to address serious concerns in their crawl space, including structural instability, standing water issues, and poor insulation. The project demanded a multi-step process involving foundation reinforcement, water management, and thermal insulation.

Step 1: Structural Repairs – Lally Column Replacement

The crawl space contained seven rusted and damaged Lally columns, which posed a serious structural risk.

Our Solution:

• Provided temporary structural support to floor joists.

• Removed and disposed of the damaged Lally columns.

• Excavated and installed new 12″W x 12″L x 16″D rebar-reinforced concrete footings.

• Allowed proper curing time (48+ hours) before proceeding.

• Installed new 4″ diameter concrete-filled steel Lally columns equipped with top and base plates for maximum stability.

• All columns were factory primed with rust-inhibitive paint, ensuring long-term durability.

Step 2: Creating a New Crawl Space Entrance

To provide safe access to the crawl space, we constructed a new entry point.

Process Highlights:

• Provided temporary structural support to the foundation wall and sill plate.

• Used diamond blades to cut the crawl space foundation wall.

• Installed steel plates and structural reinforcement at the new entry point.

• Finished the task by installing a secure access door.

Step 3: Water Management – Drainage and Sump Pump Installation

We implemented a complete drainage and sump system to combat existing and future water issues.

Executed Tasks:

• Excavated perimeter and dual center trenches in the crawl space.

• Installed perforated PVC drain pipes on a 2″ gravel bed, wrapped with soil separators.

• Connected pipes to a newly installed sump pump basin.

• Installed a duplex sump pump system, offering dual-pump redundancy with separate power cables.

Step 4: Crawl Space Encapsulation

To create a clean, dry, and energy-efficient environment, Zavza Seal carried out a full encapsulation.

Materials and Methods:

• Covered dirt floor and walls with a 20-mil crawl space membrane, leaving a 3″ termite inspection gap at the top.

• Anchored the membrane to the foundation wall to ensure long-term adherence.

• Installed 10M Heavy Duty Reflective Insulation (R-value 18) between joists across the ceiling using Premium Foam Core Radiant Barrier.

Project Outcome

Thanks to Zavza Seal’s comprehensive approach, the homeowner in Patchogue, NY, now benefits from:

• Restored structural integrity via new Lally columns.

• A clean, moisture-free crawl space.

• A reliable drainage and sump pump system that helps prevent flooding.

• Improved energy efficiency through radiant barrier insulation.

• A safe and permanent crawl space entrance.

Why Zavza Seal?

Our work is always backed by:

✅ Licensed professionals
✅ Long-lasting, code-compliant solutions
✅ Eco-conscious and energy-efficient materials
✅ Transparent communication and no-mess policies

Looking for Crawl Space Repair or Waterproofing in Patchogue, NY?
Zavza Seal LLC provides expert solutions in structural repairs, crawl space encapsulation, and drainage installation across Long Island. Contact us today for a consultation and protect your home from the ground up.