Understanding the benefits of different types of installation

Stretch-in Installation

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

Provides enhanced underfoot comfort, 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
Facilitates access to electrical and telephone lines under floor
Practically eliminates incidences of seam peaking
No restrictions to area size
Intricate borders and inlays are possible
Usually less expensive

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, under foot comfort and overall performance
Simplifies carpet bordering and inlaying
Suitable for wheeled traffic areas
No restrictions on size of area