Les Brown Excavating Ltd. has a proven record of excellence in designing and managing building and construction projects in Oshawa, Ontario.more...See more text
When it comes to Excavation Contractor, Project Management for Roadwork, Retaining Wall Construction and more, no one compares to Grant Contracting Services.
With years of combined...more...See more text
Durham Basement Technologies Inc. (DBTI) is a waterproofing company located in Whitby. Incorporated in 1997, DBTI primarily carries out work on residential and commercial propertie...more...See more text
DBTI has built many great ECHO System finished basements over the years. All of them have depressurization versus exhaust flow rate values that exceed our minimum requirements. To my knowledge there has never been a call back. This takes quality, honest workmanship, something I know you can count on from Bill Walls every time.
Douglas S. Walkinshaw, Ph.D., P.Eng.
ECHO System inventor
ASHRAE Fellow
Founding Member of the ISIAQ Academy of Fellows
University of Alberta Alumni Honour Award Recipient
Indoor Air Technologies Inc.
VEFT Aerospace Technology Inc.
ECHO Air Inc.Read more