Problem:

A homeowner in Hicksville NY contacted Zavza Seal after noticing unusual floor movement and visible sagging in parts of the basement ceiling. During inspection, our team discovered a critical structural issue. The span between the existing support foundation wall and the wooden beam stretched 13 feet with no adequate reinforcement. Over time this type of long unsupported span causes the joists to settle and eventually crack.

In addition to the structural concerns, the chimney foundation showed signs of moisture intrusion. The exterior basement window also lacked proper drainage which increased the risk of water pooling around the foundation.

The homeowner needed a solution that addressed both structural stability and waterproofing protection. Demolition of small sections of walls, floors, and ceilings was required to reach the structural elements, and we made sure to keep removal minimal.

Solution:

1. Structural Reinforcement

To correct the unsupported 13 foot span, our team began by cutting into the concrete using diamond blades and excavating the planned locations for the new steel columns. We constructed new rebar reinforced footings at each location, sized 12 inches by 12 inches and 16 inches deep. High strength fiber mixed concrete was poured and allowed to cure for 24 hours.

Once ready, we installed two 4 inch diameter steel columns with factory primed rust inhibitive top and base plates. One column was positioned three feet from the north wall and the other near the bar area for optimal structural load transfer. After securing the columns, we cleared debris to maintain a clean worksite.

2. Beam Preparation and I-Beam Placement

We reinforced the joists by installing four feet of 2×6 lumber at the center of the new beam location and fastening them with structural screws. Galvanized 3 by 7 inch steel plates were added to the opposite side of each joist for additional stability.

With preparations complete, we fabricated and installed a W6x20 3/8 inch steel I beam directly on top of the new columns. Precision welding and structural bolts secured the beam in place, fully resolving the unsupported span issue.

3. Chimney Foundation Waterproofing

We excavated approximately seven linear feet around the chimney down to the footing. Using mechanical abrasion, we cleaned the foundation wall and removed loose or damaged material. All voids were patched before applying a long lasting liquid rubber waterproofing coating.

A pressure relief drainage system was installed at the base of the chimney to manage water pressure. We then applied a waterproofing membrane for added protection and backfilled the area to restore it to grade.

4. Basement Window Well Drainage Improvement

To resolve drainage issues around the exterior basement window, we excavated the area and installed a galvanized window well securely anchored to the foundation. The seam between the well and foundation wall was sealed to prevent leakage. A self contained drain was installed in the center of the well about four feet deep, and a gravel bed was added to improve flow. A heavy duty rain guard was installed above the well to block rainfall from entering directly. The area was backfilled and restored upon completion.

This Hicksville NY project restored the structural integrity of the basement while providing crucial waterproofing improvements. The new steel beam and column system ensures long term stability, while the chimney and window well waterproofing protect the home from moisture damage.