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    SECTION 07105

    BITUMINOUS MEMBRANE WATERPROOFING

   PART 1 - GENERAL

   1.01 SECTION INCLUDES

    A. Hot applied coal tar bitumen waterproofing with fabric reinforcement.

    B. Cant strips.

    C. Protective cover.

   1.02 RELATED SECTIONS

    A. Section 02223 - Backfilling.

    B. Section 03300: Concrete foundation surfaces.

    C. Section 07160 - Bituminous Dampproofing.

   1.03 REFERENCES

    A. ASTM D450 - Coal-Tar Pitch Used in Roofing, Dampproofing and Waterproofing.

    B. ASTM D43 - Creosote Primer Used in Roofing, Dampproofing and Waterproofing.

    C. ASTM D227 - Coal-Tar-Saturated Organic Felt Used in Roofing and Waterproofing.

    D. ASTM D1668 - Glass Fabrics (Woven and Treated) for Roofing and Waterproofing.

    E. ASTM D2178 - Asphalt Glass Felt Used for Roofing and Waterproofing.

    F. ASTM D4022 - Coal Tar Roof Cement.

    G. NRCA (National Roofing Contractors Association) -Waterproofing Manual.

   1.04 SYSTEM DESCRIPTION

    A. Waterproofing System: Applications of bitumen with plies of integral fabric reinforcement to prevent moisture migration to interior.

   1.05 SUBMITTALS

    A. Submit under provisions of Section 01300.

    B. Product Data: Provide properties of primer, bitumen, mastics, and characteristics of reinforcement fabric.

    C. Manufacturer's Installation Instructions: Indicate special procedures and perimeter conditions requiring special attention.

    D. Manufacturer's Certificate: Certify that Products meet or exceed specified requirements.

   1.06 QUALITY ASSURANCE

    A. Perform Work in accordance with NRCA Waterproofing Manual.

    B. Test material samples in accordance with ANSI/ASTM D450.

   1.07 QUALIFICATIONS

    A. Applicator: Company specializing in performing the work of this section with minimum 5 years documented experience approved by manufacturer.

   1.08 ENVIRONMENTAL REQUIREMENTS

    A. Maintain ambient temperatures above 40 degrees F for 24 hours before and during application until membrane has cured.

   1.09 WARRANTY

    A. Provide five year warranty under provisions of Section 01700.

    B. Warranty: Include coverage for waterproofing failing to resist penetration of water, except where such failures are the result of structural failures of building. Hairline cracking of concrete due to temperature change of shrinkage is not considered a structural failure.

    C. For warranty repair work, be responsible for removing and replacing materials concealing waterproofing.

   PART 2 - PRODUCTS

   2.01 MANUFACTURERS

    A. Koppers Industries, Coal Tar Waterproofing System.

    B. Substitutions: Under provisions of Section 01600.

   2.02 COAL TAR MATERIALS

    A. Coal Tar: ASTM D450, Type II.

    B. Coal Tar Primer: ASTM D43, creosote type.

    C. Coal Tar Sealing Mastic: ASTM D4022, bitumen filled with mineral dust and mineral fibers, to mastic consistency.

    D. Glass Mat: Coal tar saturated, Koppers Tar-Glas manufactured by Koppers Industries.

   2.03 ACCESSORIES

    A. Protection Board: 1/2 inch thick bitumen impregnated glass fiberboard treated to resist fungi and insects, bitumen coated both sides.

    B. Cant Strips: Bitumen impregnated fiberboard.

   PART 3 - EXECUTION

   3.01 EXAMINATION

    A. Verify substrate surfaces are durable; free of matter detrimental to adhesion or application of waterproofing system.

    B. Verify items which penetrate surfaces to receive waterproofing are securely installed.

   3.02 PREPARATION

    A. Protect adjacent surfaces not designated to receive waterproofing.

    B. Clean and prepare surfaces to receive waterproofing in accordance with manufacturer's instructions.

    C. Do not apply waterproofing to surfaces unacceptable to manufacturer or applicator.

    D. Apply mastic to seal penetrations, small cracks, or minor honeycomb in substrate.

   3.03 APPLICATION

    A. Conform to NRCA - Waterproofing Manual details.

    B. Prime surfaces in accordance with manufacturer's instructions.

    C. Install cant strips at internal corners.

    D. Apply hot moppings of bitumen and embed fabric reinforcement in accordance with manufacturer's instructions.

    E. Apply bitumen at a temperature limited by equiviscous temperature (EVT) plus or minus 25 degrees F (14 degrees C); finish blowing temperature not to be exceeded for four hours.

    F. Apply the required number of plies of reinforcing material using the phased method of application. Divide the total number of plies into 2 phases. Install each phase in shingle method with each strip overlapping preceding strip 26 inches for 32 inch wide material and 29 inches for 36 inch wide material.

    G. Roll or press sheet firmly into bitumen eliminating wrinkles, air pockets, or disruptions of continuity.

    H. Apply two extra 12 inch wide fabric plies at corners, intersections, angles, and over joints.

    I. Apply two extra 12 inch wide fabric plies diagonal to internal corner interruptions to membrane.

    J. Extend membrane over cants and up intersecting surfaces at membrane perimeter as per manufacturer instructions.

    K. Terminate top edge of membrane and flexible flashing under counter flashings, seal with mastic.

    L. Continue reinforced membrane over control and expansion joints in accordance with reinforcement manufacturer's instructions.

    M. Apply top coat at a rate recommended by the manufacturer.

    N. Seal protrusions through membrane with multiple plies of reinforcement and flood coating, mastic and flexible flashings. Seal watertight.

   3.04 FIELD QUALITY CONTROL

    A. Field inspection and testing will be performed under provisions of Section 01400.

    B. On completion of horizontal membrane installation, dam installation area in preparation for flood testing.

    C. Flood to minimum depth of 1 inch with clean water. After 48 hours, inspect for leaks.

    D. If leaking is found, remove water, repair leaking areas with new waterproofing materials as directed by Architect/Engineer; repeat flood test. Repair damage to building.

    E. When area is proven watertight, drain water and remove dam.

   3.05 PROTECTION OF FINISHED WORK

    A. Protect finished Work under provisions of Section 01500.

    B. Do not permit traffic over unprotected or uncovered membrane.

    C. Protect membrane from damage by adhering protection board, applied with mastic over membrane surface. Scribe and cut boards around projections and interruptions.

   3.06 SCHEDULE

    WATERPROOFING SCHEDULE

    A. Exterior concrete or masonry surfaces in contact with earth, walls or roofs or galleries, dry-wells, tunnels and basements, except manholes, valve basins, meter vaults and the underside of slabs on grade see table for plies and mopping rates. Glass fiber fabric reinforcement.

    B. Floors under showers and floors of channels wet wells, and other structures above areas that are to remain dry. See table below for plies and mopping rates. Glass fiber, fabric reinforcement.

    C. Exterior concrete surfaces of walls and roofs of reservoirs, wet wells, filter beds, clear wells and other structures intended to contain or convey water.

    Head of

    Water Plies of Bitumen

    Ft. Fabric Moppings

    1-3 2 3

    4-10 3 4

    11-25 4 5

    26-50 5 6

    END OF SECTION

Rembco Geotechnical Contractors specializes in slope stabilization, foundation repair and support, shoring, grouting, soil nails, micropile installations, and sinkholes. We are experienced in these applications: micro piles, sinkhole repair, permeation grouting, pressure grouting, soil nails, chemical grouting, micropiles, compaction grout, rock anchors and compaction piles. Our specialties are rock anchor, chemical and compaction grouting, mini piles, sinkhole repair, micropiles, and soil nailing. We use a problem-solving approach in the geotechnical portions of buildings, bridges, water plants, sewage plants, tunnels, sinkholes, caisson, and roads. Rembco techniques apply when adding new real estate structures: especially rock anchor, microfine grouting, soil nailing, micropile installations for foundation support. Add URL Construction, Drilling and Concrete