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Business Details
35 Years
experience
Expert Trenchless Sewer Replacement in Seattle
Founded in 1991, we have dedicated over three decades to delivering quality, cost-effective waterproofing and drainage solutions across the Pacific Northwest. Our core values of quality, honesty, integrity, and reliability guide every project, ensuring we provide the most effective solutions tailored to our clients' needs. With extensive experience and investment in the latest trenchless technology, our skilled crews minimize property disruption while delivering durable, efficient results. We pride ourselves on prompt, reliable service, offering personalized attention to every client.

Our commitment to excellence ensures projects are completed swiftly and to the highest standards, giving homeowners peace of mind. Recognized for our strong work ethic, we aim to proactively address aging infrastructure before emergencies arise. As the owner, Paul Korenovsky, I oversee operations to maintain our reputation for exceptional service and technical expertise. Our focus remains on solving problems permanently, saving clients time and money compared to traditional methods. We serve Seattle, Eastside, and Everett, offering free, no-obligation bids for all trenchless solutions.
Services
Trenchless Pipe-Lining Pipe-Bursting Sewer Line Replacement Water Line Replacement Waterproofing Drainage Solutions
Details
  • Year established: 1991
Highlights and features
  • We offer over 30 years of experience in trenchless solutions
  • Our crews use the latest trenchless technology for minimal disruption
  • We provide cost-effective replacements saving thousands compared to traditional methods
  • Our minimally-invasive approach preserves your landscaping and infrastructure
  • We guarantee prompt, reliable service with personal attention to each project
What people say
Strong work ethic Commitment to job well done Effective solutions Cost-effective replacements Minimally invasive methods
Services
Trenchless Pipe-Lining
Our trenchless pipe-lining process rehabilitates damaged sewer lines using cured-in-place pipe technology. After cleaning and inspecting the existing pipe, we install a resin-saturated liner that forms a durable, jointless replacement. This method requires only small access points and preserves existing infrastructure.
Pipe-Bursting
Pipe-bursting replaces old sewer or water lines with new high-density polyethylene (HDPE) pipes. Using specialized equipment, we fracture the existing pipe while pulling in the new replacement. This method allows upsizing of pipes and requires minimal excavation compared to traditional digging.
Sewer Line Replacement
We specialize in complete sewer line replacement using trenchless technology. Our methods eliminate the need for extensive digging, preserving landscapes and hardscapes. We handle both residential and commercial projects with diameters ranging from 4 to 8 inches.
Waterproofing
Our waterproofing services protect properties from water intrusion using proven methods and materials. We address foundation waterproofing, exterior drainage systems, and interior moisture control solutions tailored to Pacific Northwest conditions.
Drainage Solutions
We design and install comprehensive drainage systems to prevent water accumulation. Services include French drains, sump pump installations, and grading solutions that redirect water away from structures while maintaining property aesthetics.
People
Paul Korenovsky
Owner
With over 30 years in the industry, Paul Korenovsky leads Allied Waterproofing & Drainage, overseeing operations and ensuring adherence to quality standards. His expertise in trenchless technology and commitment to customer satisfaction drive the company's success.
Questions
What trenchless services do you offer?
We provide pipe-lining for sewer rehabilitation and pipe-bursting for complete replacement, both requiring minimal excavation compared to traditional methods.
How much can I save using trenchless technology?
Customers typically save 50% or more compared to traditional digging methods, with costs thousands less for most projects.
How long does a trenchless repair take?
Most projects complete in 1-2 days, significantly faster than traditional methods that often require a week or more.
Do you serve areas outside Seattle?
We serve Seattle, Eastside, and Everett, providing free no-obligation bids for all trenchless solutions in these service areas.
What makes your trenchless method different?
Our patented inversion method handles complex pipe transitions without structural compromise, using reinforced liners that prevent stretching during installation.