CE 2.9: Efflorescence Icicle or Ice Damming Formation

Attics should be provided with sufficient ventilation (if designed to include ventilation), air sealing and thermal insulation, and roofs should have adequate eaves protection to minimize ice damming and icicle formation.

One-Year - Work and Materials

Where icicle or ice damming development can be related to a defect in the attic ventilation, eaves protection, thermal insulation, and air leakage from the interior or other workmanship-related concerns, the defects shall be corrected to minimize ice build-up.

Icicle formation can pose a hazard to building users. Some regions are more susceptible to icicle formation than others. Where water, snow or ice can accumulate on a building, provision shall be made to minimize the likelihood of hazardous conditions arising from such accumulation.