X0306 4 2019-11-15 0 0001340476 DIRTT ENVIRONMENTAL SOLUTIONS LTD DRTT 0001788773 Calkins Jeffrey 7303-30TH STREET SE CALGARY A0 T2C 1N6 ALBERTA, CANADA 0 1 0 0 Chief Operating Officer Common shares 2019-11-15 4 P 0 9400 3.213 A 9400 D The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.12 to $3.32, inclusive. The reporting person undertakes to provide to DIRTT Environmental Solutions Ltd., any security holder of DIRTT Environmental Solutions Ltd., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within this range. /s/ Nandini Somayaji, as attorney-in-fact for Jeffrey A. Calkins 2019-11-18