Proven
Expertise.

“Every structure tells a story.
Our job is to ensure that story stands the test of time.”

— Brent Cornelison, President, NWRC

WORK

  • Large concrete surface under construction with barriers and equipment, adjacent to a building.

    Hot Fluid-Applied Rubberized Asphalt Waterproofing

    Spokane, WA

    For a downtown sports complex, we conducted electronic leak detection and quality assurance. Identifying multiple membrane breaches, we facilitated timely repairs before overburden installation.

  • Flat rooftop with ventilation systems and building in the background

    Thermoplastic Polyolefin (TPO) membrane.

    Central Montana

    At a hospital in central Montana, our quality assurance services uncovered installation deficiencies overlooked during the manufacturer’s warranty inspection. Our intervention ensured corrective actions were implemented.

  • Flat white roof with surrounding trees

    Polyvinyl Chloride (PVC) Membrane

    Spokane, WA

    We provided forensic investigation, structural and roof design, quality assurance, and construction administration for a historic building in Spokane, ensuring the integrity and longevity of its roofing system.

  • Small building with mural in a park setting, featuring trees and a cloudy sky.

    Wood Shingle Replacement

    Addressing severe deterioration, we oversaw the replacement of existing wood shakes with new cedar shingles, coordinated with the installation of a low-slope roof system.

  • Rooftop construction site with worker and materials

    Roof System and Insulation Upgrades

    Upgrading a roof system lacking insulation, we introduced R-38 polyisocyanurate rigid insulation and tapered insulation to enhance drainage efficiency.

  • Flat rooftop with equipment, surrounded by buildings and trees

    PVC Reroof Project at a Medical Facility

    Spokane, WA

    In downtown Spokane, we managed a comprehensive roof replacement and upgrade for a large medical facility, encompassing assessment, design, procurement assistance, construction administration, and quality assurance.

  • Flat rooftop with skylights and distant buildings under a cloudy sky

    Condition Assessments

    We are an independent engineering and consulting firm providing unbiased assessments of your building’s exterior assemblies. Our expert evaluations help you understand each system’s condition, allowing for informed planning of repairs and replacements.

  • Gravel rooftop with several rectangular skylights and a cloudy sky background.

    Ballasted Roofs

    Understanding whether a re-cover or a full tear-off and replacement is needed empowers building owners and property managers to make the best investment decisions.

  • A person wearing a safety vest and helmet inspecting a flat rooftop with metal pipes and spray-painted markings in orange.

    Electronic Moisture Scan Services

    Identifying moisture intrusion and the extent of damaged or deteriorated materials will help prevent the moisture from remaining in the roof system. Moisture laden insulation will not perform as intended and trapped moisture may allow microbial growth as well as severe deterioration to wood or steel roof structures.

  • Rooftop view with HVAC unit, and Goodwill store visible across the street.

    Roof Repairs

    Improperly installed roof penetrations can lead to costly water intrusion. Always hire a licensed roofing contractor for flashing installations on mechanical upgrades and an independent consultant to ensure the roof remains undamaged.