Project Location: Westbury, NY
Client: Residential Homeowner
Service Provider: Zavza Seal LLC
Project Overview
A homeowner in Westbury, NY contacted Zavza Seal LLC after experiencing persistent moisture problems in their crawlspace, especially along the cinder block foundation wall. Upon inspection, our waterproofing and insulation specialists confirmed water intrusion through the crawlspace walls, inadequate rim joist insulation, and poor downspout drainage contributing to excess moisture buildup.
This comprehensive project focused on three key areas:
- Waterproofing 132 sq. ft. of crawlspace wall
- Insulating and air sealing 22 linear feet of rim joists
- Installing four downspout extensions with a drywell drainage system
Subject Area 1: Crawlspace Wall Waterproofing (Approx. 132 sq. ft.)
Challenge:
Water infiltration through porous cinder block walls was causing moisture accumulation and contributing to an unhealthy crawlspace environment.
Zavza Seal’s Solution:
- Surface Prep: We began by cleaning and scarifying the cinder block wall to ensure a solid bond for waterproofing materials.
- Structural Sealant: Applied 6,000 PSI waterproofing cement at the wall-to-floor joint to block active water pathways.
- Mesh Reinforcement: Installed a strip of 4.5 oz fiberglass mesh that extended 6 inches up the wall and 6 inches across the slab, reinforcing the sealant and preventing cracking.
- Top Coat Application: Covered the mesh with a second coat of waterproofing cement to seal the system completely.
- Extended Waterproofing: Applied two additional coats of 6,000 PSI waterproofing cement up to 3 feet high on the interior walls to create a long-lasting moisture barrier.
Our crawlspace waterproofing services in NY use high-strength cement and advanced mesh reinforcement techniques for unmatched durability.
Subject Area 2: Rim Joist Insulation (Approx. 22 LF)
Challenge:
Uninsulated and unsealed rim joists were allowing air leaks and contributing to temperature imbalances and energy loss.
Zavza Seal’s Solution:
- Surface Prep: Carefully prepared the rim joist surfaces to ensure proper adhesion.
- Insulation Installation: Installed R-18 closed-cell polyethylene foam rolls with reflective reinforced foil for thermal efficiency.
- Air Sealing: Hermetically sealed the edges using spray foam insulation to block air movement and increase energy performance.
Subject Area 3: Downspout Drainage & Drywell Installation (4 Downspouts)
Challenge:
Improperly terminated downspouts were discharging water too close to the foundation, contributing to water pooling and infiltration.
Zavza Seal’s Solution:
- Downspout Extensions: Used fittings and adapters to extend each of the four downspouts below grade.
- Trenching: Excavated 12 linear feet away from the house for each run.
- Drywell System: Installed a 5-gallon drywell at the trench end, positioned on a 1-foot gravel bed to promote filtration.
- Drainage Pipe Installation: Connected each downspout to the drywell using 4” solid PVC drainage pipe.
- Pop-up Emitter: Integrated a pop-up emitter to discharge excess water to the surface during heavy rains, preventing backflow.
We provide expert downspout drainage and drywell installation services in NY for long-term exterior water management.
Final Outcome
✅ Crawlspace walls sealed with industrial-grade waterproofing
✅ Rim joists are properly insulated and sealed against air infiltration
✅ Downspout system upgraded to redirect water away from the home’s foundation
✅ Improved crawlspace air quality and reduced moisture levels
✅ Enhanced foundation longevity and homeowner peace of mind
Why Homeowners Choose Zavza Seal LLC
With our deep expertise in crawlspace waterproofing, insulation, and exterior drainage, Zavza Seal LLC delivers tailored solutions that address the root causes of water damage. Our commitment to using high-performance materials and best-practice techniques ensures every project meets the highest standards of durability and protection.
💧 Need Expert Crawlspace Waterproofing or Drainage Solutions in NY?
Call Zavza Seal LLC today to schedule your free on-site assessment.