The tariff will cost US builders and consumers dearly, and hurt Canadian forest industry.  All tariffs and retaliatory tariffs do this.

While Trump focuses on goods and shoots the general economy in the foot, we should focus on services and intellectual property (IP).   The US consistently has surpluses with us in this field, and takes every opportunity in trade negotiations to extend patent, copyright, and trade secret protections to entrench their lead.   IP is only as valuable as governments allow it to be, and retaliation there actually reduces our consumer costs and frees tech newcomers to compete with incumbents.  This is the lever Canada should use.