Town/Neighborhood: Williamsburg
Borough/County: Brooklyn
Construction Type: Residential
Category: Basement Waterproofing, Door Frame Replacement, Ceiling Repair, Insulation
Problem
The residential property at 21 Devoe Street in Brooklyn was plagued by rotted door frames, a damaged underground storage ceiling, and insufficient insulation. These issues not only posed a threat to the structural integrity of the building but also compromised its safety and energy efficiency.
Solution
Zavza Seal implemented a multi-faceted repair and insulation strategy across several key basement areas, combining waterproofing, structural reinforcement, and energy efficiency upgrades. We replaced rotted door frames with pressure-treated wood, sealed and waterproofed the underground storage ceiling using high-strength mortar and Basecrete cement, and installed vapor barriers and cellulose insulation in the boiler room ceiling. Additional insulation was applied using closed-cell polyethylene foam with reflective foil across exposed joists and basement doors to enhance thermal performance. The client also benefited from a ConEdison rebate, which we applied as an upfront discount.
Subject Area: Front Basement Door
We replaced the exterior rotted door frames with new, pressure-treated door frames to ensure long-lasting durability and improved security.
Subject Area: Ceiling of Underground Storage
Our team executed a comprehensive repair strategy. We used a steel brush to clean the area, applied high-strength mortar to all holes, gaps, and large spaces, and then applied a layer of 7,050 PSE Basecrete waterproofing cement. We installed 4.5oz reinforced fibermesh where necessary and completed the job with a second layer of Basecrete.
Subject Area: Boiler Room Metal Ceiling (approx. 16′ x 8′)
Our experts installed point-bonded non-woven netting or vapor barrier sheets to cover all the gaps, holes, and spaces. This allowed access to our blow-in machine’s hose, which we used to blow in cellulose insulation, maximizing the R-value of the area.
Subject Area: Basement Back Wood Door
We installed a roll of R-15 closed-cell polyethylene foam with reflective reinforced foil to cover the entire area, enhancing the door’s insulation and energy efficiency.
Subject Area: Basement Back Room with Exposed Wood Joists (approx. 12′ x 12′) and Vestibule near Back Door (approx. 7′ x 3′).
We installed a roll of R-17 closed-cell polyethylene foam with reflective reinforced foil to cover the bays between the joists, providing superior insulation.
Note: The client received a ConEdison Rebate as a discount.
PHOTOS FROM PROJECT
Conclusion
This project demonstrates the expertise and dedication of the Zavza Seal team in providing high-quality and efficient waterproofing and structural repair solutions. The client was highly satisfied with the results, which not only resolved the immediate issues but also improved the energy efficiency and safety of the property. At Zavza Seal, we continue to deliver proven, reliable solutions for all types of construction challenges.
Need help with basement waterproofing or structural repairs in Brooklyn, New York? Contact Zavza Seal now at (631) 980-1800 or schedule a free inspection by filling out this form and receive expert solutions with guaranteed results.