Installation Instructions

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14.3.1 Seam Sealing (Attached Cushion Products)
Apply a bead of seam adhesive to the cut edge of one side only in sufficient
quantity to seal both trimmed edges. Ensure the bead thickness is sufficient to
cover the primary and secondary backing (above the cushion) without
contaminating face yarns (See Figure 3). In order to bond the seam edges
together, join the edges while the seam adhesive is still transferrable.
Figure 3
14.4 Pre-applied Adhesive Systems (“peel-and-stick”)
Pressure sensitive adhesives sometimes are applied to attached-cushion backings
during manufacturing. Backings of this type have special floor preparation
requirements. Consult the carpet manufacturer for recommended installation
procedures and the use of primers, if needed.
15.0 Carpet on Stairs
15.1 Preparation
It is required that the stair tread, riser and stair nose should be clean, dry and
structurally sound. The stair nose return should be rounded ¾ to 1 inch (19 to 25
mm) to prevent sharp stair edges from cutting carpet and/or cushion, and to
provide proper carpet contact for adhesive installations. When carpet is installed
over a separate cushion, extend the cushion over the stair nose.
15.2 Stretch-in Installation
Tack strip is to be installed on each tread. It is required that pins on the tread point
toward the riser. On a waterfall-type stair installation, tack strip is to be installed
on risers also. Pins on risers point down to the tread. It is required that the gully
between strips be slightly less than double the carpet thickness. Where a turned
finish is desired, tack strip and cushion are about 1½ inches (38 mm) less than the
carpet width, to allow for a turn under on each side of the stairs. Some stairs
require tack strip on the sides to maintain the proper tension. When using a cap-
and-band or contoured technique, tack strip is not used on riser.