SPECIFICATION
CONDITIONS
General and Special Conditions shall govern this work.
SCOPE OF WORK
This work includes all material, labor, equipment, supervision necessary for,
and incidental to, executing and completing installation of Hydro-Guard 2000
Membrane as manufactured by Mer-Krete Products, Inc. This material shall be
installed in strict accordance with the manufacturer’s printed instructions
and only by one of their pre-qualified contractors.
MATERIALS
Hydro-Guard 2000 Membrane shall be composed of a flexible, polyester reinforced
waterproof membrane with integral base flashing and synthetic rubber latex mastic.
Acceptable physical qualities for this latex mastic membrane system are as follows:
1. Synthetic rubber latex used in this formualtion shall have a minimum total
solids content of 58% when tested by the dry cup method.
2. The tensile strength shall be a minimum of 450 psi.
3. The membrane shall elongate a minimum of 500%.
4. The membrane shall withstand a waterhead of 115 ft. for a period of sixty
minutes without water transmission or rupture of the membrane.
5. The average thickness of this covering shall be approximately 30 mils dry
film thickness.
6. Elongation over a crack shall be .22 inches.
7. Adhesion in shear shall be a minimum of 500 p.s.i.
8. Adhesion of the membrane to tile using the thin set method shall be a minimum
of 500 p.s.i.
9. The membrane shall show no change after freeze-thaw cycling (250 cycles after
cure).
10. The membrane system shall have I.C.B.O. approval.
All raw materials used to produce this waterproof covering shall be fire retardant,
and therefore not represent a potential fire hazard and shall not emit solvents
or other recognized pollutants into the atmosphere.
Compositions of oxychloride cement, epoxies, urethanes, PVC’s, PVA’s,
silicones, solvent thinned elastomer solutions or combinations thereof will
not be considered acceptable under this specification.
All materials used to formulate this coating shall be delivered to the job in
unopened bags and pails labeled with the manufacturer’s name and address
as well as the date of manufacture. All materials shall be completely pre-packaged
and pre-blended at the factory.
Underlayment materials shall be Underlay-M or as approved by manufacturer.
Thin-set adhesive shall be Latex 200 and Filler 211.
Drains shall be a type approved by the membrane manufacturer as illustrated
in their printed detail drawings.
*NOTE: CSI format specifications are available on floppy disc.
Call any Mer-Krete office.
SPECIFICATION
SUBSURFACE PREPARATION
A. CONCRETE
Concrete must have a smooth and uniform finish free of dirt, grease, oils and
film-forming curing compounds and be properly pitched for drainage as shown
on plans and specifications (1/8" per foot minimum). The concrete mix for
the slab shall have a sufficiently low water to cement ratio to insure the cohesive
strength necessary to accept the overlay.
B. WOOD
Consult manufacturer.
C. THERMAL
INSULATION OR OTHER SURFACES
Consult manufacturer.
INSTALLATION
This membrane covering shall be installed in strict accordance with the manufacturer’s
printed application instructions and as outlined below:
1. Apply a coat of Hydro-Guard 2000 Mastic using a brush or roller for vertical
surfaces and a trowel for flat surfaces.
2. While the coating is still wet, roll in the reinforcing fabric, overlapping
the fabric edges a minimum of 2 inches and turning up all base and flashing
areas a minimum of 4 inches.
3. Apply an additional coat of Hydro-Guard 2000 to “sandwich” the
fabric between coats of mastic and allow to cure.
4. When positive waterproofing is required, apply a final coat of mastic after
the membrane has dried to the touch to ensure that any pinholes are completely
filled.
*NOTE: Hydro-Guard 2000 is intended to be installed over the mortar bed for waterproofing and crack supression.
PROTECTION
After completion, the latex mastic membrane shall be adequately protected by
the prime contractor against damage or misuse by other trades until final acceptance
of the building.
WARRANTY:
The membrane covering shall be guaranteed against faulty workmanship and/or
materials for a period of five years. See Mer-Krete warranty for specific requirements.
Mer-Krete
Systems
a Division of ParexLahabra
501 Van Ness Avenue, Torrance, California 90501
(323) 775-2461 / FAX (310) 320-4938
E-mail: info@merkrete.com
(800) 851-6303