CDR Bulletin - Current Issue

In the wet Pacific Northwest flat roofs are not uncommon.  This Bulletin takes a look at the three most common flat roof systems used in the area.

Flat Roof Membranes 

See our Bulletin Library for previous issues.

Construction Consulting 


Our consulting services can vary widely and include:

  • Introductory project review 
  • Plan review and related mark-ups during the design process
  • Plan review with focus on specific areas of concern following design completion
  • Verbal, photographic and written reports of findings and opinions
  • Analysis of work/cost as executed by various construction trades
  • Selective review of on-going construction issues and concerns
  • Creation of support documentation for construction in process
  • Creation of support documentation for future construction


CDR is also experienced in analyzing a variety of specialized documents involved in the design and construction process, including:

  • codes and regulations
  • competitive bid documents
  • consulting agreements
  • contract specifications
  • daily job diaries
  • installation instructions



  • material specifications
  • prime contracts
  • proposals requests
  • purchase orders
  • subcontracts