Waterproofing
Sealants, building envelope sealing, and long-term water management for Connecticut’s commercial, places of worship, and institutional buildings.
Where the building meets the weather.
Water is the long-term enemy of every building. F.J. Dahill provides comprehensive waterproofing services as a single-source contractor with roofing, masonry, and carpentry working together.
Every waterproofing capability we offer.
Sealants & Caulking
Commercial-grade sealants at joints, transitions, and penetrations. Specified to substrate, movement class, and exposure.
Through-Wall Flashing
New and replacement through-wall flashing at masonry transitions, parapets, and window heads.
Deck & Plaza Waterproofing
Pedestrian and vehicular plaza waterproofing systems with appropriate wearing surfaces.
Air & Vapor Barriers
Modern air and vapor barrier systems integrated with roofing and wall envelope work.
Leak Diagnostics
Water testing, infrared scanning, and leak diagnostics to identify the actual point of entry.
How we deliver waterproofing projects.
Diagnosis before repair
We diagnose the actual source before recommending the fix.
System integration
Roofing, masonry, and envelope sealants work together as one system.
Long-warrantied systems
Manufacturer-backed warranties on qualifying installations, and a long-term preventative maintenance plan that addresses potential issues.
Recent waterproofing work.
Project names and photos to be confirmed by client.
Often paired with waterproofing.
Have a waterproofing project?
Tell us about your building, your timeline, and your operational constraints. We will respond in a timely manner.