Mass timber construction is a fast-emerging method in the construction industry, both in Canada and abroad; unsurprisingly, proposed regulatory changes to expand its use have therefore been the subject of significant interest and discussion within the industry. In particular, the proposed regulatory changes will bring greater alignment amongst Canadian model codes, with the goal of fostering harmonization between the national and provincial codes on the use of mass timber. …The key proposed changes to the NBC relate to Encapsulated Mass Timber Construction (“EMTC“). …EMTC is different than two other widely-known mass timber construction methods, known as “combustible construction”and “heavy timber construction” . Both combustible construction and heavy timber construction, which often have larger areas of timber exposure, each only stipulate a fire resistance rating of under 45 minutes, which mean that they fall below the degree of fire protection required of EMTC.