top of page

PDB Debrief: EIFS Types

November 2022


EIFS (Exterior Insulation Finishing System) is a common material used in construction. It allows for cost effective incorporation of architectural and aesthetic design choices.


PB versus PM

PB (polymer-based) is by far the most common type. It is attached to the substrate, mesh is embedded into the base coat, and a finish coat is applied for finishing and applying colors and textures.


PM (polymer-modified) is fairly uncommon, with a mesh that is attached with screws and plates versus being embedded in the base coat layer.



4 Types of EIFS Systems

Direct Applied EIFS (DAFS): This is the original system created in Europe in the mid 20th century. This is not really used in the US.

Barrier EFIS (“Classic” EIFS): Basic EIFS, it has no back up system or redundancy for moisture penetration. This is the “original” EIFS that has gained a reputation for moisture issues.

Water-managed EIFS (“Drainable” EIFS): A water resistant barrier (WRB) is incorporated into the EIFS as a back up in case of cracking or leaking. This system will create a way for the moisture to drain out of the structure, rather then into the walls.

Rainscreen EIFS (EIFS with a Cavity Wall): A water-managed EIFS with a cavity behind it for secondary waterproofing to be installed. The most expensive option, but most robust moisture protection.


EIFS General Information:

  • Follow the manufacturer’s instructions—improper installation can lead to moisture issues

  • Special inspections are required for EIFS systems

  • A cost effective way to incorporate aesthetic design elements

  • Provides an energy efficient insulation for reducing thermal loads

  • Codes and ordinances can vary widely from jurisdiction to jurisdiction on the use of EIFS

  • Moisture intrusion is the biggest enemy of EIFS

  • Most EIFS systems are troweled on, but there are special finished (metallic, stone, etc.) that must be sprayed on under very strict weather and temperature conditions.


Further Reading:

https://www.lerchbates.com/news/how-to-tell-the-d ifference-between-eifs-and-stucco/#:~:text=There%20are%20two%

20types%20of,to%20a%20cementious%20finish%20coat.

https://www.abbae.com/articles-exterior-insulation-and-finish-systems-eifs-101/


Tags:

Featured Posts
Recent Posts
Archive
Search By Tags
Follow Us
  • Facebook Basic Square
  • LinkedIn Social Icon
  • YouTube Social  Icon
bottom of page