Carpet Installation Information

Carpet Installation Information

Basic Installation Guidelines

Carpet installation must be properly planned, estimated, and coordinated. The installation plan should include accurate measurements, seam placement, and detail areas requiring special considerations, such as unusual room shapes, closets, borders, etc.

Installation specifiers

Provide drawings with the approved location of seams, edge moldings, carpet direction and accessories (adhesives, cushion, etc.).

General contractor

Provide an appropriate surface upon which to install carpet, including confirmation of concrete moisture and alkali conditions, cleanliness, surface quality, and floor levelness. The contractor must also set appropriate room temperatures 48 hours prior to installation (65 to 95 degrees) and provide ventilation during and 48 to 72 hours after installation.

Installation contractor

The installation contractor must use qualified labor and specified tools and accessories; provide accuracy of measurement and coordinate with the general contractor on all applicable details, including the installation date, delivery, storage, security, and insurance.

Download this helpful Installation Timeline (44 KB) as an effective guide, whether the installation is for a new facility or for the replacement of carpet in an existing facility.

Installation Standards and Methods

Design with Carpet

CRI 104/105 Carpet Installation Standards

The industry’s gold standard resource for commercial and residential carpet installation, the CRI 104 and 105 standards provide installers, retailers, specification writers, and building professionals with detailed principles and guidelines for carpet installation.

Representing more than 25 years of information-gathering and installation expertise, CRI’s 104 and 105 carpet installation standards are the only carpet installation standards created and supported by the industry.

In 2015, the CRI convened industry leaders to update the 104 and 105 standards to address innovations that require new approaches to carpet installation, particularly planning, and subfloor preparation. These changes reflect the industry’s ongoing dedication to quality and customer satisfaction.

Understanding Different Installation Methods

Stretch-in Installation

There are situations in which a specifier will wish to utilize the stretch-in method. Its selection may be for one of the following reasons:

  • Provides enhanced underfoot comfort and acoustical properties (i.e., higher noise reduction coefficients and higher impact noise ratings) when installed with a separate cushion
  • Increases thermal insulation (R-value)
  • Can be used over floors that are unsuitable for glue-down
  • Corrective measures, such as seam repair, may be easier to perform
  • Removal costs usually are less than the removal of an adhered installation

Stretch-in installations should be avoided in the following cases:

  • On ramps and inclines
  • Where office systems furniture and demountable partitions are utilized
  • Where heavy rolling traffic is likely
  • Where there is excessive humidity
  • When carpet has a unitary backing or other backing systems designed only for glue-down installation

Direct glue-down installation

  • Suitable for rolling traffic and ramp areas
  • Seams are more durable since there is no vertical flexing
  • Minimized buckling in buildings that have HVAC systems turned off for extended periods of time
  • No restretch situations
  • Virtually eliminates incidences of seam peaking
  • No restrictions to area size
  • Intricate borders and inlays are possible

Double glue-down installation

This method combines the stability of direct glue-down carpet with the cushioning benefits of a separate cushion, stretch-in installation, as outlined below:

  • Improves carpet appearance retention, underfoot comfort and overall performance
  • Simplifies carpet bordering and inlaying
  • Suitable for wheeled traffic areas
  • No restrictions on size of area