Installation Instructions

16
Broadloom Carpet
10.0 Carpet Seaming
All seams must be properly prepared in strict compliance with carpet manufacturer
recommendations.
10.1 Trimming
Carpet seams must be trimmed using tools and techniques best suited for the
carpet style (e.g., loop-pile, cut-pile, cut-and-loop pile). Refer to the Tools and
Materials table in the appendix of this standard. Trim edges far enough into the
material to maintain the structural integrity of the carpet and to seam without gaps
or overlaps.
NOTE: Although “row-cutting” both edges is preferred, other
trimming techniques may be more suitable on some carpet. Many
carpets do not lend themselves to all methods of cutting. Trimming too
far into patterned carpet will compromise pattern match. Contact
carpet manufacturers for specific seaming methods.
10.2 Sealing Edges/Seams
All seams must be sealed unless otherwise specified by the manufacturer.
Regardless of installation method, most carpet requires an edge protective
material be introduced between the edges to be joined. This material can be a
liquid or thermoplastic and can be applied using various procedures and
techniques.
10.2.1 Edge Sealing
For carpet backings that require edge sealing, apply an appropriate seam
adhesive covering the thickness of the primary and secondary backing without
contaminating face yarns on both edges of the seam. This ensures that all edges
trimmed for seaming are protected from edge ravel. Allow seam adhesive to
dry before proceeding with the installation to prevent transfer to the face yarn.
10.2.2 Seam Sealing (direct glue down only)
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 without contaminating face yarns
(See Figure 1). In order to weld the seam edges together, join the edges while
the seam adhesive is still transferrable.