All of our information is sourced from manufacturer data.

Delta-MS Underslab

Dorken Systems

Delta-MS Underslab

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Vapor Retarder (Class I) Vapor Retarder (Class I)

Mechanically Attached Mechanically Attached

Polymer Polymer

Ceiling, Sloped Roof, Wall Ceiling, Sloped Roof, Wall

Concrete Concrete

Design Options

Product Description

DELTA-MS UNDERSLAB provides reliable long-term protection for permanently dry basements. It is a high-performance vapor retarder and sub-base course with high compressive strength, allowing long-term protection from rising moisture.

Sheet Width


Standard Sizes: 3' 6", 5' 0", 6' 0", 6' 6", 7' 0", 8' 0", 9' 10"



Sheet Length



Standard Sizes: 5' 5-9/16"




Manufacturer Design Notes

DELTA®-MS UNDERSLAB is a dimpled membrane, impermeable to water and water vapor. It acts as concrete waterproofing and vapor retarder.

Performance Data

Air Permeance

Rate of airflow through the barrier per square foot at a specified pressure difference

Roll Tensile Strength

Weight needed to break the roll, per inch of width

Water Vapor Transmission

An imperial perm is defined as 1 grain of water vapor per hour, per square foot, per inch of mercury

perm (imperial)


Product Weight Per Area

lb / ft ^ 2

28, 77

Minimum Temperature Rating

The lowest temperature that the product has been confirmed to still function at.



Dorken Systems

Dörken Systems Inc.4655 Delta Way Beamsville L3J 0T6

1 (905) 563-3255