Exterior Insulation and Finish System (EIFS) Research

Testing three different EIFS applications

For this research I will construct samples using a piece of OSB as the substrate. I will be focusing on the affects of moisture to the samples. Each sample will allow moisture to enter the system and I will measure how well the OSB holds up to the introduced moisture. I will be testing three systems. 

  1. The 80’s and early 90’s barrier system when the manufacturers were using glue to adhere the foam.
  2. The late 90’s to early 2000’s system where a cloth barrier and mechanical fasteners was used. 
  3. The cutting edge of technology in the industry using a liquid moisture barrier.

These three systems represent the 3 systems used on residential Exterior Insulation and Finish System construction. In the 80’s when the industry moved to the residential market we were applying the eps foam to the wood with glue. Later, a cloth barrier and mechanical fasteners were used to attach the foam. It was not till after 2000 that a liquid moisture barrier was introduced. Personally it was not until the reports from the Oak ridge National Laboratory were released in 2007 that I started using the liquid moisture barrier exclusively.   

Research EIFS RepairThe samples will be designed to allow moisture to the back side of the system. A half inch of water every day will be added to the top a the samples. The same amount of water will be added to each and will will monitor how well each drains the water before it is absorbed by the foam and the OSB. The samples will be tested with a Delmhorst moisture meter. The making of the ‘EIFS Samples‘ page including images and videos.

The samples will be placed in a tank with each one having a funnel type apparatus attached to the top where the water will be added each day. There will be a container under each of them to catch the water that drains through the system. The object of the experiment is to see which system drains the moisture the best and which absorbs the moisture. We will test the moisture content behind the system and see at the end of the testing if the moisture affects the OSB. A half inch of water will be added to the top of each sample 4 days a week and one day a week 2 inches of water will be added with 2 days a week with no water added at all. A total of 88 inches of water will be added over a 30 day period. There will be two phases of the experiment each spanning 30 days. The first 30 days simulating summer conditions where the temperature will reach a high of 90 degrees and a low of 72 degrees. The second phase of the experiment will simulate winter conditions where the temperature will drop below freezing  each day. Data will be gathered each day. 

The experiment will be video recorded and posted to our YouTube channel. 

This experiment is scheduled to start on Monday, January 30th. 2017.

Research by Corey Turcotte

Research EIFS by Corey Turcotte




EIFS (Exterior Insulation and Finish System) Research