Tarlton installed an air and vapor barrier system during construction of the St. Louis University main hospital, pavilion and ambulatory care buildings. The system is a high-build, fluid, elastomeric membrane that is applied to a glass mat exterior sheathing designed, installed and integrated with the building façade to stop the flow of air and water vapor into and out of the building enclosure. The air vapor barrier is tied into the below-grade waterproofing, window, curtainwall and door systems to ensure sustainability for the life of the structures.
The hospital building has 11 levels which required the use of manlifts with booms ranging in size from 40 to 150 feet, along with swing stages to access areas above lower-level roofs. The Tarlton team worked with full exposure to the weather elements during the course of a year.
The schedule required that the AVB work be accomplished in the time frame between completion of the substrate wall system and start of the glazing and exterior façade installations. The team carefully planned its tasks to safely and efficiently work in coordination with as many as 1,000 workers from every building trade.