Observation From The Field: Poor Adhesion

Benchmark Service: Construction Phase Services

Issue: The Contractor failed to apply adequate weight to adhered insulation boards resulting in failed hot asphalt adhesion.

Solution:  The loose insulation boards were removed and re-adhered in hot asphalt with proper weight applied after placement to ensure adequate adhesion.

Possible Impact: Poor adhesion increases the risk of failed wind uplift resistance, displaced insulation boards, and roof blow-off.

Removing poorly adhered insulation boards as advised.	Insulation and facer paper remnants after removal indicate very few areas of adequate adhesion.