Above & Below Grade Waterproofing
Protecting
Buildings
from Water
Intrusion
Comprehensive waterproofing solutions above and below grade - combining decades of restoration experience with industry-leading certified systems.
Certified Waterproofing Systems
Water Intrusion Shortens a Building's Life.
Interstate Contracting & Restoration provides comprehensive waterproofing solutions for commercial buildings, addressing both facade-related above-grade and foundation-related below-grade conditions.
Our team combines decades of restoration experience with industry-leading waterproofing systems to help property owners protect assets, prevent costly damage, and extend service life.
Above-Grade Waterproofing
Manufacturer-Backed Protection
Above-grade waterproofing prevents moisture penetration, wind-driven rain intrusion, and deterioration of the building envelope.
Elastomeric Coatings
Protective coating systems bridge minor cracks, resist moisture infiltration, and improve long-term exterior performance.
Joint Sealant Replacement
Failing sealants are removed and replaced using premium products from Tremco, Pecora, and Dow Corning.
Clear Masonry Repellents
Penetrating water repellents protect masonry while preserving natural appearance and vapor transmission.
Below-Grade Waterproofing
Foundations, Drainage & Water Management
Below-grade waterproofing addresses groundwater infiltration, hydrostatic pressure, seepage, and drainage deficiencies at the source.
Foundation Waterproofing
Commercial-grade membrane, coating, and dampproofing systems selected for the conditions of each foundation.
Excavation & Access
Safe access solutions expose the full extent of conditions requiring attention before waterproofing repairs begin.
Drainage Improvements
Site drainage corrections relieve hydrostatic pressure and direct water away from building foundations.
Crack Repairs
Specialized epoxy injection and waterproofing techniques restore integrity and prevent ongoing water infiltration.
Thermal Drone Detection
We Find Leaks Others Miss.
Using thermal-equipped drone technology, we identify trapped moisture behind facades and building envelope systems.
Thermal data helps pinpoint the exact source of above-grade leaks and develop targeted repair solutions without guesswork or unnecessary openings.
Thermal imagingPrecise source identificationTargeted repair scopesWarranty support
Project Gallery
Waterproofing Systems in the Field
Roof decks, plaza areas, wall assemblies, foundation conditions, coatings, and access-supported waterproofing work.
Pedestrian Ramp CoatingsUrethane Coatings
Coatings to protect the structure, improve aesthetics, and create a non-slip surface.
Clear Water RepellantsPenetrating Non Film Forming
Exterior masonry water repellants reduce freeze-thaw damage.
Elastomeric Coatings100% Protection
Keep water out, improve aesthetics, and bridge hairline cracks.
Foundation Waterproofing20 Year Warranties Available
Sheet membranes, roll-on, and spray-applied systems.
Air BarriersCavity Wall Air and Water Barriers
Liquid and self-adhered systems available.
Atriums and SkylightsRoutine Maintenance Is Critical
Thermal expansion, wind loading, and UV degradation take a toll on the system.
Dow DefendairAir and Weather Barrier
Efficient spray-applied applications.
Raised Patio SystemsMembrane and Liquid Systems
Waterproofing membranes designed to keep spaces below dry.
Elevator Pit WaterproofingCrystalline, Liquid and Membrane Systems
Keep water out of critical elevator systems.
Elevated Paver SystemsMulti Component Systems
Integrated drainage, accessible and maintainable.
Footer DrainsEvery System Is Customized
Drainage systems installed to divert water away.
Deck CoatingsPlaza Decks
Liquid-applied plaza deck waterproofing systems.
Protect Your Building Before It Becomes a Bigger Problem.
Schedule a professional waterproofing assessment and receive expert recommendations tailored to your property - above grade, below grade, or both.