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What is CarpetLOK?

CarpetLOK is a system for installing carpet tiles. Other methods eliminate wet glue by substituting dry adhesives, but only CarpetLOK eliminates adhesives entirely. CarpetLOK also precisely aligns carpet tiles with raised access floor panels, which makes change easier & sharply reduces waste. One tile; one panel; one move.

CarpetLOK is also a physical product that facilitates actual installation. Each anchor is a small, cruciform component which integrates with the raised floor system & forms a mechanical barrier—every 8’ in both directions—which engages the carpet backer & keeps tiles in place.

How long has the CarpetLOK system been in use?

The first large-scale installations were completed in 2010.

What are anchors made of?

Anchors are made in the U.S. from 100% recycled, post-consumer, engineered plastic.

How far do anchors extend above the floor panels?

The top of each anchor extends a tiny fraction of an inch, by design reaching slightly below the top of the carpet tile backer

The top of each anchor extends a tiny fraction of an inch, by design reaching slightly below the top of the carpet tile backer

No. Anchors cannot be detected—either visually or by “feel”—once carpet is laid.

We’ve often been on site when a designer or facility manager demonstrating the system to colleagues wants to reveal an anchor…& can’t find one. (This is the only situation in which you may need to lift extra tiles!)

What keeps anchors from being damaged if run over by hard-wheeled dollies or book carts?

Because the top of each anchor lies within the plane of the backing material & below the carpet pile, anchors are well-protected.

Note that anchors are often exposed to an active construction environment for weeks between floor & carpet installation. The occasional anchor gets replaced (extras are supplied), but they’re remarkably resilient.

How do I get info for my planned project?
If it’s your 1st CarpetLOK project, we recommend reviewing the video courses on this site & browsing the documentation in our Library. Your Interface & Haworth reps can usually answer any remaining questions…but we’re also available to help with specific application concerns; write to


How are anchors attached to the floor system?

Anchors have locating studs for precise positioning on pedestal heads, but are held in place by the floor panels. (Unless all 4 panels at an intersection are removed, anchors stay put.)

Are more anchors better? Can I put anchors @ every intersection?

In a word…no. It’s human nature to think “if they recommend every 8’ on center, then every 4’ will yield a ‘stronger’ or more secure installation.” However, extensive testing—both in the lab & in the field—proves this is not the case.

The CarpetLOK grid creates “islands” of individual, unrestrained tiles between each set of anchors, & the recommended spacing allows just enough room for lateral forces to be optimally absorbed without causing tiles to dislodge. Adding more anchors, except in special cases (such as the foot of a ramp), can negatively impact performance.

Why not put TacTiles @ every intersection?

The short answer is that—just like adding more anchors—adding TacTiles throughout the field will negatively impact performance. TacTiles combine individual carpet tiles into a single membrane…but CarpetLOK works best when tiles perform as individual modules.

TacTiles are essential, though, for stabilizing the perimeter of every room between each wall & the 1st row of anchors, & also for securing all cut carpet tiles.

Should CarpetLOK anchors be used on a ramped surface?

Anchors are commonly installed on ramps, & recommended to maintain carpet alignment with adjacent areas. However, carpet installers must follow specific Interface glue-down installation instructions for ramps.

Is special protection required for move-ins?

No. The same protection recommended by virtually all carpet manufacturers—laying boards of masonite or lauan plywood along the path that furniture-laden dollies will travel—works perfectly on a CarpetLOK installation. (Light-duty Visqueen or similar plastic sheeting may also be used, but this is NOT a substitute for hardboard protection of moving aisles.)

Can anchors be easily replaced by facility staff?

Yes. In the unlikely event an anchor is broken during a move or by contractors working in the space, we provide a small supply of spare anchors on each job, along with simple instructions (see CarpetLOK College course #202).


Can I place an order just for anchors?

No. CarpetLOK anchors are only available when ordered with carpet from Interface.

Will CarpetLOK work with carpet manufactured by companies other than Interface?

CarpetLOK anchors are exclusive to Interface, & only available with a carpet order.

We licensed the product in this fashion in large part because Interface tiles have the most consistent & best-performing backers in the industry; that’s critical for sustained system performance.

When it’s time to replace carpet, am I still restricted to Interface?

While all carpet wears out, anchors don’t. Unlike virtually any other carpet tile installation method, CarpetLOK is installed once & lasts for the life of the facility.

It’s essential Interface replacement carpet be continuously used for reasons cited above: rigid, reliable & consistent backer performance. The fact that completely standard Interface carpet can be used, straight out of the box, makes replacement easier, faster, & less costly than with any other system.

My project has a mix of raised floor & slab. Do I need to order two kinds of carpet tiles?

Not at all. Interface tiles supplied for use with the CarpetLOK system are exactly the same as any other Interface carpet tiles, just factory cut to a slightly larger module. Any Interface 24” tile, straight out of the box, will perform equally well with CarpetLOK anchors on raised access floor, & on concrete slab.

Most facility managers choose to simply order all their carpet as 24” tiles, making all areas interchangeable & reducing inventory requirements.

What’s the cost per square yard?

The cost of CarpetLOK anchors is always included in the quoted cost of the carpet. Material cost may be slightly higher; installed cost may be the same or lower.

Interface carpet with the CarpetLOK system is slightly more expensive. However, far fewer TacTiles are required than in a non-CarpetLOK installation, & most carpet installers find their productivity jumps between 30-50%. These factors tend to make the system extremely competitive.

Do CarpetLOK installations really cost less over time?

Absolutely. Occupancy cost always varies with churn rates, but the benefits of a) much faster moves, b) sharply reduced attic stock, & c) little or no waste when changes are made can be very substantial.