4. Finished Dry Thickness: See Article 3.04, Paragraph H herein
5. Bond Strength: 2,000 psi (per ASTM C882)
PART 3 - EXECUTION
3.01 GENERAL:
A. Contractor shall accurately field-measure and size the rehabilitation products for each
individual manhole. Each existing sewer manhole to be rehabilitated may have a
different configuration and varying field dimensions. All field measurements shall
conform to the requirements of the manufacturers of the rehabilitation products.
3.02 INTERNAL LINER SYSTEM:
A. All loose and protruding mortar, bricks, manhole steps, roots, and anything else that
might prevent proper application of the liner shall be removed prior to application.
Manhole steps and protruding pipe shall not be replaced after installation of the liner.
B. High pressure water shall be used during surface preparation to produce a clean, abraded,
and sound surface with no evidence of laitance, loose material, or other contaminants.
Surface shall have a suitable profile for application of liner in accordance with the
manufacturer’s requirements.
C. All areas to be lined shall be dry, clean, and free of dust, dirt, sand, and other
contaminants as recommended by the manufacturer prior to installation. A torch or heat
lamp may be required to ensure a dry surface.
D. Any spray equipment used for application shall be specifically designed to accurately
ratio and apply the liner system. Liner system shall be installed in strict accordance with
the manufacturer’s installation instructions over the entire interior of the manhole and 2
inches up onto the frame and 6 inches down onto the bench.
F. Epoxy coating, if ordered by the Engineer, shall be installed in strict accordance with the
manufacturer’s installation instructions, including those for materials handling, primers,
mixing, environmental controls, working time, working temperature, pot life, allowable
time between coats (recoat time), safety, and spray equipment. Installation of epoxy
coating over cementitious base coat shall not occur until the cementitious base coat has
cured to the extent and time required by the manufacturer. A permanent identification
2019 CIPP Lining Project Manhole Rehabilitation
Nashua, NH 02800-7
