Local Expert in Long Island for Fixing Foundation Problems

Zavza Seal LLC: Your Premier Solution for Foundation Problems in Long Island

Zavza Seal LLC brings a wealth of experience in resolving foundation problems in the Long Island region, including Suffolk, Nassau, Brooklyn, and Queens. As a trusted service provider, we are dedicated to delivering the highest quality service to our valued customers.

Keeping Your Home Strong is Our #1 Priority

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When do you need Foundation Repair?

While you may initially think foundation problems manifest in horizontal surfaces like floors or ceilings, the vertical surfaces of your home often reveal the actual signs of foundation issues. Walls, door frames, and wall finishes signal the need for immediate foundation repair.

Recognizing the early signs of foundation problems is crucial for homeowners to address the issue promptly and avoid being discouraged by potential costs. For instance, if you notice any foundation cracks, it’s imperative to schedule foundation crack repair as soon as possible. If you observe several of the following signs, you likely require foundation repair or, at the very least, an assessment by a foundation repair expert.

Common Signs of Foundation Problems

Common Indicators of Foundation Problems

Foundation problems exhibit distinct signs that differ from normal wear and tear. Here are some common indicators you should be vigilant about:

  • Slanting or Sloping Cracks on Interior Walls
  • External Stair-Step Brick Cracks
  • Doors Sticking or Failing to Latch Properly
  • Gapping or Separation of External Trim
  • Movement of Wood Trim and Built-Ins
  • Evidence of Shifting in Other Interior Fixtures
  • Deterioration of Foundation Support

Causes of Foundation Problems

Understanding the Root Causes of Foundation Issues

Several natural and artificial factors contribute to the weakening and damage of foundations. Let’s delve into these causes:

Water Damage

Water plays a significant role in the development of foundation issues. The soil surrounding your foundation can expand or contract depending on its moisture content. Both scenarios can result in problems with your home’s foundation, mainly if the expansion or contraction is concentrated in one section. Poor drainage can lead to soil erosion, which may necessitate water damage restoration services later on

Soil Expansion

Certain soils, particularly those containing smectite clay minerals, are prone to significant swelling and shrinking due to moisture absorption and release. When the ground beneath a structure remains consistently moist or dry, it has less impact on the foundation. However, excessive swelling and shrinking can place substantial strain on the foundation.

Improper Foundation Construction

Foundation issues can also arise when the soil experiences drastic changes in moisture content, which is common in areas with clay soil. Building a home on different soil types can also lead to differential settlement, resulting in structural damage. Proper drainage, such as sump pump installation, can mitigate water pooling around your home.

Naturally Occurring Sinkholes

Sinkholes develop due to subsurface water drainage without a proper exterior drainage exit. It can lead to subterranean soil erosion, potentially forming underground caverns. Sinkholes, regardless of size, pose a severe threat to your home’s foundation. Early detection is crucial, so keep an eye out for signs.

Why Hire Us?

We focus only on waterproofing and insulation services


We focus only on waterproofing to ensure you work only with the best

We use only high quality products for Foundation crack repair

Quality Products

We use only high quality materials to ensure years of uncompromising performance

Our Foundation crack repair service is very cost effective

Cost Effective

We deliver quality waterproofing service at reasonable prices

We provide five star services

5 Star Service

Our team is committed to delivering 100% customer satisfaction

What’s Next?

Request a free estimate

Request a Consultation

Schedule a consultation now and share with us your needs

Schedule a consultation

Schedule a Meeting

We set up a phone call and a subsequent meeting on location to understand the size of your project

Request a quote / contract

Quote / Contract

We deliver a quote for your work and if you agree provide a contract to start the job

We do the service requested


Our team of experts performs the work on location

100% customer satisfaction assured

100% Satisfaction

Our project manager ensures you are completely satisfied with the results

5 Star Google & Home Advisor Reviews

100% Google's Five Star Reviews
100% Home Advisor Five Star Reviews


Five Stars Reviews 1

Annette Casatelli

I received a few quotes to get the walls in my home filled in with blown in insulation. Zavza Seal was affordable and they did an excellent job.

They were very concerned with cleaning up, which I appreciated. I felt the difference in my home immediately. No more freezing cold walls. I recommend them, hands down.

Five Stars Reviews 2

Noemi Herles

Our experience with Zavza Seal was wonderful and smooth. The crew is well organized. They listen to your plans. They showed out in time. They left everything clean. They did an amazing job! I highly recommend this company.

Five Stars Reviews 3

Ellen Szuchmacher

Efficient, courteous and responsible workers. The job was quoted as being completed in 2 days but more work was required and they returned on the 3rd day and completed the job without additional charges. They reinsulated my crawlspace (not an easy job). I recommend Zavza Seal without reservation.

Five Stars Reviews 4

Michael Rutigliano

Couldn’t be more satisfied with the job Zavza Seal did. Brendan and Jake were accommodating, fair and extremely knowledgeable. Their team worked incredibly hard that day under difficult conditions and did a great job. I manage a multi-unit HOA and we will definitely be using them again.

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