Expansive soils are well known in Denver and Colorado. These soils are also found in 40 of the 50 United States and worldwide in all but the polar regions. Different remedies have been used to meet the expansive soils challenge. One material being used is the geomembrane. This geotextile is treated to make it relatively waterproof. Moisture change will cause the expansive soil to swell or shrink. Minimize the moisture change and the volumetric change will be minimized. The DuPont Company brought their geomembrane to the United States in the 1960's. One of the first geomembrane projects in this country took place in Colorado. The geomembrane was placed horizontally between sand layers. Initial reports were encouraging. The Texas Highway Department used the geomembrane on a San Antonio urban arterial street project in 1976. Testing took place prior to and following construction. The geomembrane was placed horizontally on the subgrade, base dumped and spread, watered, and compacted. Paving and testing followed. The next Texas highway geomembrane project was on Interstate Loop 410 in San Antonio. The fabric was placed 8 feet deep along the shoulders of both northbound lanes. The adjacent southbound lanes of the divided highway received no geomembrane. Post construction testing showed the geomembrane protected lanes provided the smoother ride and required less maintenance. Over twenty additional Texas highway projects used the geomembrane usually as a deep vertical moisture barrier and usually successfully. Wyoming DOT has used the geomembranes on over 50 projects across the state beginning in 1981 totaling more than 4,000,000 square yards at prices of $1.25 per square yard. Their early projects placed geomembrane horizontally. Later, and currently they are placing it horizontally and vertically, and are pleased with the results. Other states have used the geomembranes on their highways. Australia is using geomembranes on their highways. and around some buildings. They have developed a trenching boom capable of cutting 6 to 6-1/2 feet deep, only 3 inches wide, permitting the use of a flowable backfill of cement, sand, water, and fly ash. Several buildings sites in Texas have been similarly protected by using geomembranes. The fabric is placed horizontally and then vertically. The geomembranes have been used on railroads in France, China, and Russia. Israel and the United States have used them on canals and airport runways. Tests of geomembrane material confirm its decades long durability. The geomembrane costs have significantly decreased in Texas from early bids of $20 per lineal foot down to $6 per lineal foot. Geomembranes can be an effective remedy when dealing with expansive soils and their resultant damages.