conditions that will prevent a satisfactory application. Do not start
application until defects and conditions have been corrected.
3.2
SURFACE PREPARATION
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NOTE: A paragraph should be added to Section 03300,
"Cast-In-Place Concrete," to the effect that curing
compound containing wax or oil should be removed
prior to application of waterproofing.
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Ensure surfaces to be treated are clean, dry, smooth, and free from
deleterious materials and projections. [Thoroughly wet holes, joints,
cracks, and voids in [masonry] [concrete] with water and fill with Portland
cement mortar, strike flush, and permit to dry.] Cut off high spots or
grind smooth. Finish top surfaces of projecting masonry or concrete ledges
below grade, except footings, to a steep bevel with Portland cement mortar.
Sweep surfaces to be covered before applying waterproofing to remove dust
and foreign matter. Cure concrete by a method compatible with the
waterproofing system.
3.3
APPLICATION
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NOTE: Delete requirements for cant strips if cant
strips are not required.
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Follow manufacturer's printed installation instructions. [Where indicated,
mop continuous cant strips in place at vertical and horizontal corners
before installing the waterproofing membrane. Do not use untreated wood or
wood fiber cants.] When using solvent welding liquid, avoid prolonged
contact with skin and breathing of vapor. [Provide adequate ventilation.]
Carry waterproofing of horizontal surfaces up abutting vertical surfaces as
indicated and adhere solid to the substrate. Avoid wrinkles and buckles in
applying membrane and joint reinforcement.
a.
Non-Self-Adhering Membrane: Unroll membrane and allow to remain
flat for at least one-half hour before application. Apply an
asphalt concrete primer prior to application of asphaltic
adhesive. Where solvent adhesive is applied, allow major portion
of solvent to evaporate so that bonding adhesive does not stick to
a dry finger touching it. Apply elastomeric waterproofing
membrane in a full bed of adhesive at a uniform coverage rate in
accordance with the recommendations in the membrane manufacturer's
printed instructions. [Where membrane on horizontal surfaces are
to receive concrete fill, apply adhesive in 100 mm 4 inch wide
strips at 600 mm 2 feet on center.] Pull membrane tight without
stretching. As soon as adhesive is fully set and dry, recheck lap
splices. Where openings or fishmouths appear, reseal and reroll
lap splices.
b.
Self-Adhering Membrane: Apply composite, self-adhering membrane
on surfaces primed at a uniform coverage rate in accordance with
membrane manufacturer's printed instructions. Remove release
sheet and apply with tacky surface in contact with dried primer.
c.
Protection:
Protect membrane over horizontal surfaces from
SECTION 07131
Page 11
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