Installation Guide

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18.2 Adhesive Application - Follow manufacturer’s recommendations. Generally, a thin
film of pressure-sensitive adhesive is used to prevent lateral movement of modules.
19. Patterned Carpet Installations
19.1 Uninstalled Patterned Carpet - Carpet is a textile fabric subject to inevitable
processing variations in the four pattern conditions: bow, skew/bias, elongation
variations and trueness of edges. Measurement of these four conditions is
performed on an uninstalled breadth of carpet. Individual manufacturers have
tolerances to which their patterned products are required to conform. There are no
industry standards for carpet pattern variations.
19.2 Understanding Carpet Manufacturer Tolerances – A successful patterned carpet
installation requires a thorough understanding of patterned carpet characteristics by
designers, specifiers, and all others involved with carpet selection and installation.
Carpet is a textile fabric subject to inevitable process variations, which are more
critical when patterns are involved. Most manufacturers provide established
tolerances and specific installation instructions for their patterned goods, although
most do not guarantee exact pattern match. Skilled, responsible and competent
craftsmen experienced in the installation of patterned carpet can effectively make
adjustments within manufacturer tolerances to provide a successful installation. To
assist this process, clearly understand manufacturer tolerances. It is required that
these tolerances be communicated and agreed upon by all parties prior to the
specification, bid, purchase and installation.
Factors affecting pattern match on the job site include, but are not limited to: the
method of installation, the condition and levelness of the floor and the type of carpet
backing system selected. It is imperative that all parties agree upon realistic levels
of expectation before the carpet is installed.
Installation of patterned carpet requires more time and expertise, requiring the use of
mechanical stretching devices and additional staffing, thus affecting the cost of
installation.
19.3 Patterned Carpet Installation Methods - Generally, patterned carpet may be
installed by all installation methods. Consult the carpet manufacturer for restrictions.
19.4 Seaming Diagram – It is required that the seaming diagram reflect the desired
pattern direction (6.1).
19.4.1 Patterned Carpet in Corridors - It is highly recommended that carpet with width-
wise linear patterns not be installed breadth-to-breadth along the length of a corridor
to avoid inconsistent alignment of pattern.
19.5 Roll Sequence - Roll sequencing information may be available from the carpet
manufacturer. In the absence of roll sequencing information from the carpet