How to Keep a Modular Couch from Sliding Apart

By CHITAShare September 20, 2026

Quick answer: To keep a modular couch from separating, first check whether the bases, the whole sofa, or only the cushions are moving. Engage the original connectors as instructed and check every foot’s support and floor contact. For freestanding designs such as Kenna, inspect the non-slip feet and surface. Contact us about damaged parts or persistent movement instead of drilling into the frame or floor.

A gap between modular sofa seats can come from several places: a loose connector, feet moving across the floor, or a cushion shifting on a frame that has stayed still. Look at the bases first. Once you know what is moving, you can choose a fix that matches your sofa.

Identify what is moving

What you notice	Where to look	First step
Two entire modules move apart	The gap between the bases	Check the series connection system and the feet.
The whole sofa shifts together	The floor under every foot	Check floor contact and the surface under the sofa.
Cushions separate while bases stay aligned	Loose seat and back cushions	Reposition the cushions and check their orientation.
A module rocks or sits unevenly	Feet, floor level, and frame	Stop using the unstable seat and inspect it with our support team.

Remove loose cushions so you can see whether the gap continues down to the frames. Compare the arrangement with the instructions for your series. Take photos before lifting or separating a heavy piece. Clear a place to set the module down and arrange help for the lift. HSE’s load-handling guidance includes planning the route and using help or handling aids when needed.

Cream Kenna modular sofa with an ottoman extending the left seat.

Reconnect the modules your sofa was designed to join

A modular sofa may use brackets, clips, or another connection system. Some designs use freestanding pieces with non-slip feet. Identify your series before buying a universal connector or trying to force two modules together.

Clear the surrounding area and remove items stored in or beside the sofa. For a powered piece, unplug it before the handling steps specified in its instructions.
Check that the pieces belong in those positions. Arm, armless, corner, and ottoman modules can have different sides and attachment points.
Follow the supplied instructions to align and engage each connector. Ask another adult to help when the instructions require lifting.
Set every foot back on the floor and gently check the connection in normal use.

Our sectional and modular sofa guide explains why the word modular describes a range of layouts and connection designs. The connection instructions for your specific sofa provide the assembly method.

Check the feet and floor contact

Inspect the feet for missing parts, loose attachment points, and debris. Keep the contact surfaces clean using the sofa and flooring care instructions. A rug edge under only some feet can leave a module uneven; arrange the sofa so each module has the support its design requires.

If you are considering an anti-slip pad, check the pad material against your flooring care requirements and the sofa foot shape. Some flooring finishes have restrictions on rubber or adhesive products. The pad should sit securely under the foot without changing the module height relative to the next piece. The National Wood Flooring Association recommends leg protectors in its wood-floor scratch-prevention guidance. For a sliding module, also check the pad’s grip; a floor protector and an anti-slip pad serve different purposes.

Use the sofa’s intended feet and attachment points. Avoid drilling into the frame or floor, adding extra legs, or bridging modules with boards. Those changes need a design-specific assessment and can introduce an uneven load or obstruct moving parts.

How Kenna modules stay in place

Our Kenna Modular 4 Seat Sofa-Chaise Sectional has non-slip legs tucked beneath the base. Keep those feet fully supported and arrange the modules on a suitable, level surface. Check the floor contact again after moving a piece.

Non-slip feet help resist movement through contact with the floor. The amount of grip also depends on the surface and how the sofa is used. If a Kenna module keeps shifting during ordinary seated use, send us the configuration and clear photos of the feet and floor so we can help you assess it.

The Kenna layout can be rearranged within its available components. Move each piece using the handling instructions, rather than pulling a connected arrangement across the room. Our Kenna collection shows the current configurations. Before carrying modules through another doorway, use the route measurements in our first-apartment sofa delivery guide to check turns and the largest piece.

A family and a dog beside a cream modular sofa in a bright living room.

Separate cushion movement from frame movement

Loose cushions can need repositioning even when the modules remain in place. Put each cushion back in its correct position and reshape the fill as directed. Keep the seam and cushion edges aligned with the seat beneath them. Our cloud couch care and value guide discusses the cushion arranging that comes with loose, plush seating.

For Kenna, the listed loose cushions can be fluffed to maintain their shape. Follow the care label for the particular cover when cleaning. A cushion that looks uneven calls for a different check from a frame that separates. The care-letter explanation in our fabric sofa cleaning guide helps distinguish the cleaning method for a cover from the reshaping of its fill. A stain treatment still requires compatible cleaners. The Association for Contract Textiles explains that point in its stain-repellent fabric cleaning guidance.

Cream Kenna three-seat modular sofa with aligned bases on a continuous wood floor.

When to contact us about a loose module

Contact us if a connector is bent, a foot is damaged or missing, a frame rocks, or the pieces separate after you have followed the assembly instructions. Send the order or model details, an overall photo, a close view of the connection, and a photo of the floor contact.

Those views help us distinguish an assembly issue from a part or surface issue. Keep the affected seat out of use if it is unstable while we help you identify the next step.

Modular sofa connection questions

Do all modular couches lock together?

No. Some use connectors, while others use freestanding modules with non-slip feet. Check the connection design for the sofa series you own before adding hardware or trying to engage two pieces.

How do I stop a modular couch from separating on a hard floor?

First confirm that any original connectors are correctly engaged and that every foot is secure and fully supported. Clean the contact surfaces according to their care instructions. If extra grip is needed, check pad compatibility with the flooring finish and sofa feet.

Can I screw brackets into my sofa to hold it together?

Use additional brackets only if your sofa’s instructions specify those brackets and attachment points. Drilling brackets into an unspecified part of the frame can damage it or interfere with the mechanism. Contact us with the model and photos so we can help you identify the right connection or replacement part.

Why do gaps return even when the sofa bases stay together?

Loose cushions may be shifting while the bases remain aligned. Reposition the cushions, check their orientation, and reshape the fill as directed. If the gap reaches the frames, inspect the module connections and floor contact instead.