INSTALLATION INSTRUCTIONS
1 1/2 HOUR FIRE RATED LAMINATED
COUNTERTOP INSTALLATION
ES 10-234
REVISION:
#0002
ECO# 1558
BY:
JD
DATE:
10/23/2012
Field Over-Laminating Instructions for UL Classified Countertop
Cornell’s UL classified laminated countertop assemblies may be field over-laminated in order to provide a
seamless surface between a Cornell UL classified countertop and non fire rated countertops that will be
installed adjacent to these units. The classified countertop assembly provided by Cornell shall not be
modified in any way other than preparation of the existing surfaces in the field that are required to be
over-laminated. Acceptance of this procedure is subject to approval by the Authority Having Jurisdiction
(AHJ) and it is advisable to check the acceptability prior to proceeding with the over-lamination process.
The materials used and field installation of the over-laminate must be applied according to the following
requirements and installation instructions in order to maintain the original listing of the UL classified
countertop.
The following are the only acceptable laminate materials that can be used in the over-lamination process.
All materials used are to be maximum .050 thick general purpose laminate provided by the following
manufacturers.
“Wilsonart” general purpose laminate manufactured by the Ralph Wilson Plastic Co.
“Formica” general purpose laminate manufactured by Formica Corporation
“Nevamar” general purpose laminate manufactured by Panolam Industries
“Pionite” general purpose laminate manufactured by Panolam Industries
The following are the only acceptable adhesives to be used to apply the second layer of laminate to first
layer of the UL listed countertop. Wilsonart #810 or
#811 contact adhesive or Borden’s catalog # PVA-
104A/M304L.
Important:
All surfaces intended to be over-laminated in the field must be prepared to insure proper adhesion of the
second layer of laminate to the first. The original layer of laminate applied to the classified countertop
should be thoroughly sanded to roughen the surface to allow a proper bond with the new surface. It
should be clean, free of oil or grease, and uniform in thickness prior to applying the second laminate
layer. The adhesive listed above should be applied to the laminate surfaces according to the
manufacturer’s instructions and the second layer of laminate should then be applied over the first layer
on the UL classified countertop and the adjoining non-rated countertop supplied by others.
Please Note:
The job site contractor applying the over- laminate surface will be held responsible for de-
lamination of the field applied material due improper preparation or installation of the over-
laminated surfaces. Failure to use the required materials and procedures listed above will result
in voiding of the UL classification of the fire rated countertop assembly.
