When superior resistance to gas and moisture transmission is of upmost importance, the performance of the vapor barrier is only as effective as how well it was installed, no matter the quality of the product. W. R. MEADOWS’ PERMINATOR EVOH is a highly resilient gas/vapor barrier designed to restrict naturally occurring gases from traveling through the ground and into the concrete structure above. When properly installed, PERMINATOR EVOH is an effective barrier against radon, methane, solvents, oils, and hydrocarbons. To ensure the ability for PERMINATOR EVOH to show its strength, step-by-step directions in the form of installation guidelines are available as a reference to assist with proper application. A printable PDF version can also be downloaded thorough our website. Common barrier leaks take place around penetrations. Additional penetration guidelines have been created to aid in the correct treatment of these obstacles during installation. They can also be downloaded in PDF form.