Installation Guide

14
14.2 Preparation – Refer to Section 6.0 and 9.0 of this Standard for floor preparation
requirements.
14.3 Cushion installation - Install cushion in the longest continuous lengths possible
with consideration to traffic patterns and carpet seam placement. It is required that
cushion seams be at a right angle (90º) to carpet seams or offset at least six inches
(150 mm). Butt cushion seams net without compression, leaving no gaps. Do not
tape or staple cushion seams for double glue down installations.
14.4 Layout –Where applicable, allow for pattern repeat. Align all carpet breadths to their
proper position and trim seams. Take care to avoid cutting into cushion under
seams.
14.5 Adhesives and Trowel Notch Sizes - When applying cushion to floors and carpet
to cushion, select the appropriate adhesive and trowel notch size recommended by
the carpet, cushion and adhesive manufacturer. If recommendations are not
available, refer to the general minimum guidelines in Table II. Spread adhesive
uniformly over the cushion with the specified trowel or other application procedure.
After sufficient open time, the carpet is to be pressed into the adhesive and rolled
with the appropriate roller. Proper open time is critical for a successful installation.
Note: excessive trowel pressure causes cushion to expand into the trowel
notch reducing effective adhesive coverage rate.
14.6 Seaming - A variety of seaming options exist. Consult the cushion and carpet
manufacturer for specific recommendations.
14.7 Rolling – Refer to Section 13.6.
15. Attached-Cushion Installations
15.1 Relaxing/Conditioning Carpet – Refer to Section 7.11.
15.2 Carpet Layout - Refer to Section 9.2 (Direct-Glue Installations)
15.3 Floor-Applied Adhesive Installations - Use the carpet adhesive and seam
adhesive recommended by the carpet or adhesive manufacturer. Also, refer to
Table II.
15.3.1 Trowel Notch Size - Refer to Table II
15.3.2 Open Time – Allow adequate open time for adhesive. Open time varies depending
upon environmental conditions and the adhesive type.
15.3.3 Installation Procedures – Cut seam edges with appropriate tools based on carpet
manufacturer recommendations. Trim edges to eliminate possible height variation at
the seam. In the case of woven goods, carefully refer to the manufacturer’s