Installation Instructions

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CRI 105 - STANDARD For INSTALLATION of

RESIDENTIAL CARPET

Carpet Seaming

All seams must be properly prepared in strict compliance with carpet manufacturer

recommendations.

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 Table I – Tools & Materials at the end of

this document. 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.

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.

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.

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 transferable.

Hot Melt Seaming

A seaming tape pre-coated with a thermoplastic adhesive is centered beneath the seam.

Tape is heated by a seaming device which melts the adhesive, laminating the carpet backing

to the tape. Seams should be made over a hard, flat surface (i.e. seaming board). A carpet

seam roller is recommended to achieve proper penetration of adhesive into the carpet

backing from the seaming tape.

Summary of content (4 pages)

PAGE 1
CRI 105 - STANDARD For INSTALLATION of RESIDENTIAL CARPET Carpet Seaming All seams must be properly prepared in strict compliance with carpet manufacturer recommendations. 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 Table I – Tools & Materials at the end of this document.
PAGE 2
NOTE: •Premium grade tape with high tensile strength, sufficient adhesive on the woven scrim and a minimum adhesive width of 2 ¾ inches is recommended. •Rollers with star or spike design are not recommended for use on hot melt seams, especially, cut or cut-loop constructions. When using a seaming iron, a grooved iron is recommended for better penetration of the adhesive. Proper iron temperature is essential to avoid secondary backing distortion.
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Power Stretching Power-stretch carpet following the 7 step procedure described in Figure 2. Figure 2: Stretch Diagram for Tufted Carpet In the absence of carpet manufacturer stretch recommendations, use this diagram. NOTE: Size and shape of the room will determine corner designation. Red arrows denote use of a power stretcher and blue arrows denote use of a knee kicker. Step 1: Hook onto tack strip approx. 3 ft. in both directions along corner A. Step 2: Power stretch at approx.
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Step 6: Power stretch at approx. 15° angle from wall AB and hook along wall from C to D. Step 7: Power stretch from wall AC and hook along wall from B to D. The use of a Power Stretcher is MANDATORY. Devices used as a substitute for, or an attachment to such devices that penetrate through the carpet backing may cause injury, damage carpet or substrates, or result in inadequate stretch. Such devices are not acceptable.