We specialize in the roofing & waterproofing of large commercial, industrial, residential and retail projects. Installing Single-Ply, Built up/Hot asphalt, Tile, metal and shingle roofing systems as well as bellow grade waterproofing. We also employ a full service department providing roof maintenance, repairs and emergency repair service, for after hours, weekend and holidays. Western Single Ply holds residential, commercial roofing and general contractor licenses for re-roofing; we belong to the Flagstaff Chamber of Commerce and the Northern Arizona Builders Association.

Professional Associations & Certifications

  • Flagstaff Chamber of Commerce, Northern Arizona Builders Association, National, Arizona, California

Serviced Areas

  • Flagstaff, Sedona, Cotton Wood, Prescott, The Greater Phoenix Metro, Casa Grande and Tucson

Payment Options

  • Cash Only, Personal Checks

Contact Details

  Website
  Person Ron Diggs
  City Flagstaff, AZ
  Zip Code 86001
  Address 506 N Grant St. Suite E
  Phone Number (928) 864-7050
  Fax 602-485-4460

Business Representative

Ron Diggs

Roof Services Representative

From Our Website

Discover the latest Intelligent Transport Systems (ITS) industry trends and best practices, and watch our recent Snack & Learn Webinars featuring safe road systems. We are pleased to announce the acquisition of kW Mission Critical Engineering, a leading 175-employee engineering firm based in Troy, New York serving the data center market. We are also pleased to announce the acquisition of tk1sc, a 240-employee mechanical, electrical and plumbing engineering firm based in Irvine, California. The extraordinary technical challenges faced by WSP / Lievense during the renovation and expansion of Palais Het Loo, a 17th century palace and one of the Netherlands' most popular museums, included jacking up the listed palace buildings, a discontinuous ground water level, a basement constructed underwater and an immovable deadline.


From our local beginnings over 130 years ago to our vast international presence today, WSP has enjoyed continuous growth and enrichment of its service offering. Every milestone reached has enabled us to better fulfill our purpose of preparing our communities and environment for the future. WSP is a globally recognized professional services firm. Our talented people are well positioned to deliver successful and sustainable projects, wherever our clients need us. We welcomed experts from six different acquisitions in 2019, adding to existing expertise in all our operating regions.


The Minnesota Department of Transportation (MnDOT) develops and implements policies, plans and programs for roads, bridges, aeronautics, freight and passenger carriers, ports, waterways, and railroads for over five million urban and rural residents. WSP USA has worked with MnDOT on a variety of initiatives to maximize operational performance and support the delivery of billions in transportation improvements. Northwest Parkway, Jefferson Parkway and E-470 public highway authorities represent three alternative delivery entities in the growing Denver metropolitan area, providing convenient access to residential and employment centers, including the Denver International Airport.


We develop creative, comprehensive and sustainable engineering solutions for a future where society can thrive. Equipped with an intimate understanding of local intricacies, world-class talent and proactive leadership, we plan, design, manage and engineer long lasting and impactful solutions to uniquely complex problems. We help clients across all sectors unlock opportunities to meet the rising demand for power, maintain secure and reliable energy supplies, reduce greenhouse gas emissions, and deliver future energy schemes to help create a sustainable world.


We are the sum of our collective passion, vision and expertise. Discover the people, purpose and stories that are helping shape the organization we are today and the one we are designing for the future. We believe that for societies to thrive, we must all hold ourselves accountable for tomorrow. That means creating innovative solutions to the challenges the future will bring. It inspires us to stay curious, act locally, and think internationally. From our earliest roots in the US over 130 years ago to our vast international presence today, WSP has enjoyed continuous growth and expansion.