Polyguard_Underslab_Membrane
Polyguard Underslab MembraneBASIC USES.
Underseal® Underslab Membrane is used as a
waterproofing membrane/vapor barrier to virtually
eliminate water and vapor transmission through concrete
slabs on grade. In addition to protecting floor finishes and
indoor air quality, Underslab Membrane also acts as a
barrier to methane gas and radon gas.
Features:
• Creates a continuous seal underneath the concrete slab.
Forms a strong mechanical bond when the concrete, at
time of pouring, intermingles with the fibers of the
nonwoven geotextile.
Creates a strong adhesive bond when the static load of
the concrete slab causes the sealant/adhesive compound
to “cold flow” throughout all remaining voids between the
fabric and the underside of the concrete slab. (See the
McGraw‐Hill Dictionary of Architecture and Construction
for a definition of cold flow). The Underslab System has
been tested to ensure no water migration occurs between
membrane and concrete
Underslab Membrane has a puncture resistance of 220
lbs., which is 64 times higher than current Class A Vapor
Barrier requirements (2200 grams, or under 5 lbs). A
higher puncture resistance is critical to the vapor barrier
underslab system due to abuse caused by construction
methods, i.e. concrete truck routes, motorized‐equipment
contact with rebar during concrete applications, normal
foot traffic, and regular vibration.
Features fully‐adhered, watertight laps and other details.
Acts as a barrier against toxic contaminants, including
methane and radon gas, which may attempt to enter the
structure through concrete cracks.
May qualify for L.E.E.D. certification via these credits:
o IAQ Credit 5 ‐ Indoor Chemical and Pollutant
Source Control (below‐grade toxin barrier)
o SS Credit 3 ‐ Brownfield redevelopment
o ID Credit 1 ‐ Innovation in design
Typical Properties
* Typical results under standard laboratory conditions.
