Leasons Learned

the technical resource consultant....
"Design Oriented Architectural & Engineering firms" want to work with.

Let our firm bring added value to your team...

We have developed technical building specifications for nearly
$3 billion in construction projects
in the last 5 years

Thomas Berger, Managing Principal



Expanding L.A. Office

DTR Los Angeles Office


DTR Consulting Services, the "Building Science Guys" continue to grow their latest Los Angeles Area Office, just north of down town in the city of Glendale.  This location will help us to better serve our Clients in the Los Angeles metropolitan area. This office will help support our Orange County office in Irvine along with or two northern California offices. This unadulterated office location allows for the continued expansion of DTR Building Science Division.

Overseeing this office is the Firm Managing Principal | Senior Building Envelope Consultant, BEC, RCI, CDT, SCIP Thomas Berger brings with him a long history of experience and connection to the local community.  DTR Consulting Services continues to work with new and existing Architectural/ Engineering Clients, Building Owners, Contractors and Developers and in the Los Angeles, Orange County and San Diego Area since early 2003. This move allows DTR to build upon our current client base and to expand our Firm to better serve our current and future A/E Clients.

DTR continues to recruit the best new technical building science architects, engineers and consultants the Los Angeles area. Mr. Berger be in charge mentoring new staff members into the existing DTR Culture, providing guidance to both experienced and junior members, and increasing our market share based on our excellent reputation; DTR approach to serving our Clients.  DTR will be looking to hire both Building Envelope Consultants specialized in Building Science, Technical Architects, Construction Specifiers and Construction Inspection & Building Enclosure Testing Staff.

Golden Gate Bridge photo

Please help us Celebrate the Growth of this new DTR Office Location…


Updated: February 2019

Industry News:

4 specs


Dynaflair Corporation - name change to Security Closures
Irwin Telescopic Seating Company - merged into Irwin Seating Co.
Compudyne - changed company name to Norment Security Group, had previously combined Norshield Security Products
Dynamic Lighting - name change to Amerlux Exterior
Alcan Composites USA - name change to 3A Composites USA
Oldcastle Glass is now Oldcastle BuildingEnvelope

Updated: January 03, 2011

Professional Events:

Conferences & Seminars

Contractor-Architect image

Green California Summit & Exposition- Sacramento, CA
April 19 - 20, 2011

AIA National Convention - New Orleans
May 12 - 14, 2011

CSI Construct 2011 - Chicago, IL
September 13 - 16, 2011

Cal Green Seminars - California
January thru April 2011

Updated: January 16, 2011

What have we Learned

Incorporating Lessons Learned

Albert Einstein

Education is what remains after one has forgotten what one has learned in school.

This term means different things to different people. I was fortunate early in my career to work for some really great organizations. It was there that I first saw the implementation of "Lessons Learned" through tracking reports and Lunch & Learn meetings in which those of us that were in the field, shared problems we faced that were either attributed too, or not helped by our own construction documents.

When founding DTR Consulting Services I felt this feedback was extremely important, especially for Consultants who may not get the same field exposure as the architectural person in the field would on a weekly basis. How many times do you answer questions in the field or respond to an RFI because something on the documents is not clear or conflicts with another portion of the documents. Many of us have seen this time and time again.

As a technical consultant, we rely on our Clients to give us feedback on our specifications or other technical services. It is through that feedback along with individual experience with current field conditions that we develop our services.

It is also with that same experience we like to conduct client presentations/ discussions in which we can interject specific case studies into a common theme topic to get direct feedback from CA folks, Project Architects & Project Manager.

In many of these presentations we identify items that caused additional work on the part of the Architect or Engineer (or both) which ultimately hurts your firm in lost revenue. Some of these items result in Change Orders, others simply consume time. Both are counterproductive.


Test & Measure


How do we know what we are doing is working?

We Measure... Our Change Order Goal Rate is less than one half of one percent. We are currently well below that. Ask us to track this on your project.


Thomas C Berger

Managing Principal/CEO




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