Dörken Systems Inc.
4655 Delta Way, Beamsville, ON L0R 1B4, Canada

Phone: +1 (905) 563-3255
Tech Support:
+1 (888) 433-5824
Fax: +1 (905) 563-5582

DELTA® is a registered trademark of Ewald Dörken AG, Herdecke, Germany.

Water tight. Air tight. Weather tight. 

The water-resistive barrier that’s both air tight and vapor permeable 

Fully adhered from back to edge, DELTA®-VENT SA allows for simple, straightforward application without any fasteners required. The unique edge lap then makes it easier to apply succeeding rows. DELTA®-VENT SA comes with very clear and comprehensive installation materials, videos and technical manuals – the best in the industry – making installation easier, faster and more reliable. And the complete line of application accessories is designed to ensure every corner, window, gap and edge is 100% sealed, meaning you can be confident that the job is done right, and that it meets the specifications.

Brochure >Technical Data >Installation Guide >

How to Install DELTA®-VENT SA

DELTA®-VENT SA is proven to keep buildings dry and comfortable for the life of the building for better building performance, efficiency and customer satisfaction. It is ABAA evaluated, Building Code Evaluation ICC-ESR 2932 (AC38), meets most stringent air tightness requirements when tested per ASTM E2357 (air barrier assembly test), NFPA 285 compliant, Red List Compliant, DECLARE, and has a Health Product Declaration (HPD 2.0).

DELTA®-VENT SA leads the industry in vapor permeability with a rating of 50 perms. Water-resistive barriers with much lower permeability ratings can trap moisture within the envelope, leading to mold and damage – causing further issues with occupant comfort and health. While keeping external air and water out of the building, DELTA®-VENT SA allows moisture and vapor to escape, for more effective drying

DELTA®-VENT SA comes fully adhered for simple and straightforward application, no fasteners required. With the self-adhesive edge-lap feature, ensuring an airtight overlap is easier than ever, and takes the guesswork out of the application process. It’s lightweight, tear free, and works seamlessly with additional accessories in the system.

DELTA®-VENT SA is the only manufacturer that offers a complete line of application accessories that are chemically compatible, so every corner, window, gap and edge is 100% sealed, and your building has a continuous envelope. The team behind DELTA®-VENT SA also provides knowledgeable recommendations and Design Logic to solve air and water concerns.

Industry-leading Vapor Permeability

Complete System


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Get the Most Vapor Permeable Self-Adhesive Membrane on the Market

The superior technology of DELTA®-VENT SA is proven to keep buildings dry and comfortable for the life of the building, contributing to better building performance, energy efficiency, customer satisfaction, and keeping your reputation intact.


DELTA®-VENT SA vapor permeable, self-adhesive, air- and water-resistive barrier (WRB) allows moisture within the building enclosure to escape through the membrane via diffusion, meaning moisture won’t collect in the wall cavity. Fully adhered membranes are less prone to air and moisture leaks that are common with other types of barriers, such as spray and fluid applied.

Watch our webinar with expert Dr. John Straube 

The proof is in the building science! In this webinar, Dr. John, Principal at RDH Building Science Inc., explains how you can build high-performance enclosures with the perfect wall.