Tags: #airtightness #buildingenclosures #buildingenvelopes #buildingmaterials #buildingscience #fasteners #materialsscience #waterdamage
Can conventionally treated fasteners perform as well as a fastener patch?
The short answer, yes they can – if treated perfectly. Each time, thousands of times.
Using EIFS as an example, it is customary, per installation requirements, to treat sheathing fasteners. This is typically accomplished by dabbing each head with the AWB/WRB coating or liquid flashing prior to coating the field. The problem arises when this initial treatment is incomplete or imperfect. The ensuing field coat offers little protection and the fastener leaks. I’ve seen it too many times.
A variant of the fastener patch has evolved to receive liquid coatings. As compared to conventional treatments, coverage and consistency are improved remarkably – from 40-60% efficacy to 100%. The patch is faster, more complete, and more consistent.