Product Guide Weather & Air Barriers Prosoco Cat 5 products were eligible to be used on the Living Building Challenge-certified Bullitt Center in Seattle. Photo: John Stamets. License: CC BY-NC 2.0 (used with permission) Behind the recommendations Related articles Behind the recommendations Related articles Weather & Air Barriers High-performance air- and weather-barrier products with the lowest toxicity on the market More about Weather & Air Barriers The Hidden Science of High-Performance Building Assemblies Any four walls and a roof make an enclosure, but for efficiency, comfort, and durability, those elements have to be meticulously designed and installed. Seal, Tape, Gasket: A Sticky Search for Better Materials Given the importance of sealing hidden joints in our air and water barriers, you'd think we'd know how long our sealants, adhesives, and gaskets last. Sealing Without Stickum: Gaskets Make a Place for Themselves Compressible gaskets keep air and water barriers continuous without liquid sealants or adhesive tapes. But they don’t all last equally well. An Air Barrier Engineered for Real-World Jobsites The continuity of air and water barriers depends on the quality of workmanship, and Prosoco’s Cat 5 system is hard to get wrong. All-in-One Sheathing and Air Barrier Speeds Construction The Securock ExoAir 430 system combines USG’s gypsum sheathing with a factory-applied air-and-water barrier from Tremco for jobsite quality control. Tremco: Getting the Devil Out of Air and Water Details The Tremco ETA system offers the first-ever warranty on the performance of an assembly's air and water barriers. Silicone Air Barrier Offers Simple, Systematic Approach A whole-building air barrier system with a 15-year warranty is offered as a package from Dow Corning. Verifying Performance with Building Enclosure Commissioning For a lot less than the cost of a lawsuit, BECx uses collaboration, design-to-occupancy reviews, and testing to ensure quality and high performance.