Understanding Snow Load Requirements for Moncton Roofs
The National Building Code of Canada 2020 specifies minimum snow load design values for each region. Moncton falls in a zone with significant ground snow load requirements. Properly constructed post-2000 homes easily handle normal seasonal accumulations.
Problems arise when: (1) snow accumulates in valleys or against dormers rather than distributing evenly; (2) ice dams add weight to eave edges beyond design load; (3) aging structures have compromised rafters or sheathing from previous water damage.
Signs of Snow Load Damage on Moncton Roofs
Sagging ridgeline or roof planes (visible from ground), creaking or popping sounds from the attic during heavy snow, doors that suddenly stick or won't close (frame racking from load), and visible cracks in interior drywall along the roofline.
If you see any of these signs after a heavy snowfall, call for an emergency inspection. Do not attempt to go on the roof yourself in winter conditions without proper fall protection equipment — NB OHS 91-191 requires full harness systems for roof access.