Spring Units

Pre-Assembled Upholstery Spring Units for Sofas and Chairs

Shop pre-assembled upholstery spring units for repairing and manufacturing chairs, sofas, settees and other upholstered seating.

Livedale supplies ready-made mesh-top spring units in two depths, with width options for chairs, two-seater sofas and three-seater sofas. These replacement furniture spring assemblies provide a complete connected seat foundation without the need to position and hand-tie individual coil springs.

The range includes:

• 22″-deep mesh-top spring units
• 25″-deep mesh-top spring units
• Chair-width spring assemblies
• Two-seater sofa spring units
• Three-seater sofa spring units

These products may also be described as sofa spring units, chair spring units, mesh-top seat springs, ready-made spring assemblies or replacement furniture spring interiors.

The correct unit depends on the usable internal frame dimensions, available depth, required seat height and the construction of the original furniture.

Shop Mesh-Top Sofa and Chair Spring Units

Both spring-unit depths are available in chair, two-seater and three-seater widths.

The units taper slightly from front to back, so both the front and rear widths must be measured before ordering.

22″-Deep Mesh-Top Upholstery Spring Unit for Chairs and Sofas

The 22″-Deep Mesh-Top Upholstery Spring Unit for Chairs and Sofas is designed for furniture frames requiring a shallower front-to-back spring assembly.

The unit measures:

• 22″ deep
• 5½″ high at the front
• 4½″ high at the back

Available widths include:

• Chair: 19″ at the front and 17″ at the back
• Two seater: 43″ at the front and 42″ at the back
• Three seater: 57″ at the front and 56″ at the back

This ready-made seat spring unit may suit suitable:

• Armchairs
• Two-seater sofas
• Three-seater sofas
• Traditional and reproduction furniture
• Furniture repairs
• New upholstered seating

The 22″ depth should be checked against the clear internal frame depth rather than the external dimensions of the chair or sofa.

Allow sufficient room for:

• Front and rear furniture rails
• Spring-unit fixing points
• Edge construction
• Hessian or spring canvas
• Felt and upholstery fillings
• Foam or wadding
• The finished seat cushion

25″-Deep Mesh-Top Upholstery Spring Unit for Chairs and Sofas

The 25″-Deep Mesh-Top Upholstery Spring Unit for Chairs and Sofas provides additional front-to-back depth for larger furniture frames.

The unit measures:

• 25″ deep
• 5½″ high at the front
• 4½″ high at the back

Available widths include:

• Chair: 19″ at the front and 17″ at the back
• Two seater: 43″ at the front and 42″ at the back
• Three seater: 57″ at the front and 56″ at the back

This deeper replacement sofa or chair spring unit may suit:

• Deep armchairs
• Larger two-seater sofas
• Three-seater sofas
• Deep upholstered seating
• Furniture restoration
• New furniture manufacture

The additional depth does not change the published front and rear widths or the tapered height of the spring assembly.

Choosing the Correct Replacement Spring Unit

Before ordering a replacement upholstery spring interior:

1. Identify the original furniture spring construction.
2. Measure the usable internal frame depth.
3. Measure the internal width at the front.
4. Measure the internal width at the back.
5. Check the available height.
6. Record the original fixing positions.
7. Inspect the supporting frame rails.
8. Allow for the upholstery layers above the unit.
9. Check for centre rails or mechanisms.
10. Compare every measurement with the selected spring unit.

Do not choose solely according to whether the furniture is described as a chair, two seater or three seater.

Furniture frames vary considerably. The chair and sofa descriptions identify the approximate unit format but do not guarantee compatibility with every item of furniture of that size.

Measuring a Sofa or Chair for a Spring Unit

Measure the clear internal area where the new spring assembly will sit.

Record:

• Front internal width
• Rear internal width
• Front-to-back depth
• Available front height
• Available rear height
• Position of the fixing rails
• Location of centre supports
• Clearance around the frame corners

The spring units taper from front to back. The chair-size unit, for example, measures 19″ across the front and 17″ across the rear.

A single width measurement is therefore not sufficient.

Check that the unit will not interfere with:

• Timber corner blocks
• Cross rails
• Recliner mechanisms
• Sofa-bed mechanisms
• Existing brackets
• Previous repairs
• Other internal furniture components

Choosing Between 22″ and 25″ Spring Units

Choose the 22″-deep upholstery spring unit where:

• The furniture has a shallower seat frame
• The original unit was approximately 22″ deep
• A 25″ unit would interfere with the rear rail
• Additional clearance is needed behind the assembly

Choose the 25″-deep furniture spring unit where:

• The internal seat frame is deeper
• The original assembly was approximately 25″ deep
• The 22″ unit would leave excessive unsupported space
• A larger front-to-back spring foundation is required

The deeper unit is not automatically the better option. It must match the usable frame dimensions and original furniture construction.

Chair Spring Units

The chair-size spring units measure:

• 19″ wide at the front
• 17″ wide at the back

They may suit compatible armchairs, occasional chairs and other single-seat furniture.

Armchair frame widths and tapers vary, so both the front and rear dimensions must be checked.

Two-Seater Sofa Spring Units

The two-seater spring units measure:

• 43″ wide at the front
• 42″ wide at the back

They may suit compatible two-seat sofas and settees designed around one connected mesh-top spring assembly.

Before ordering, check whether the sofa uses:

• One complete spring unit
• Two separate seat sections
• A central timber support
• Independent spring systems beneath each cushion
• A reclining or sofa-bed mechanism

Three-Seater Sofa Spring Units

The three-seater spring units measure:

• 57″ wide at the front
• 56″ wide at the back

They provide a wider connected seat-spring foundation for suitable three-seat furniture frames.

Check for:

• Centre rails
• Timber cross supports
• Divided seat constructions
• Recliner mechanisms
• Sofa-bed components
• Existing attachment brackets
• Differences between the front and rear frame widths

Pre-Assembled Spring Units or Individual Coil Springs?

A pre-assembled mesh-top spring unit combines several springs into one connected furniture-support system.

This can reduce the need to position, secure and hand-tie individual springs separately.

Choose a ready-made upholstery spring unit where:

• The original furniture used a similar connected assembly
• The complete seat foundation requires replacement
• The furniture frame was designed for a spring unit
• The available dimensions match the internal frame

Choose Double Cone & Coil Upholstery Springs where:

• The furniture originally used individual coil springs
• A traditional hand-tied seat is required
• Only selected springs need replacing
• The frame is designed for webbing, coil springs and spring twine

The two systems should not normally be interchanged without assessing the complete furniture-frame construction.

Spring Units or Zigzag Springs?

Zigzag, sinuous and serpentine springs are normally fitted individually across the furniture frame using compatible clips.

A mesh-top furniture spring unit is supplied as a complete connected assembly.

Choose a spring unit where the original sofa or chair used a similar ready-made spring interior.

Choose Zigzag, Sinuous & Serpentine Upholstery Springs where the furniture uses separate curved-wire springs retained by frame clips.

Matching the original support system is usually more straightforward than converting the furniture to a different spring construction.

Return to Upholstery Springs to compare the full range of furniture spring systems.

Inspecting the Furniture Frame

Before fitting a replacement sofa or chair spring unit, inspect the frame for:

• Split or loose timber
• Damaged joints
• Missing corner blocks
• Old nails, staples or screws
• Loose fixing brackets
• Previous repairs
• Signs of movement
• Insufficient support beneath the unit

A new spring assembly should not be installed into an unstable or badly damaged furniture frame.

Remove redundant fixings and complete any necessary frame repairs before securing the new unit.

Browse Staple Removers, Tack Lifters & Ripping Chisels for furniture-stripping and fastener-removal tools.

Upholstery Materials Used Above Spring Units

Once the replacement spring unit is securely fitted, suitable upholstery layers can be built above the spring foundation.

These may include:

• Hessian or spring canvas
• Upholstery felt
• Hair or coir
• Polyester wadding
• Flexible upholstery foam
• Platform or lining cloth
• The final furniture covering

Browse:

• Upholstery Hessian
• Upholstery Felts
• Hair & Coir Upholstery Fillings
• Polyester Wadding
• Foam & Fillings

The upholstery build-up should reflect the original furniture construction and the required finished seat profile.

Safe Handling and Installation

Pre-assembled spring units contain tensioned metal components and can be awkward to handle because of their size.

Wear suitable eye and hand protection.

Take care when:

• Removing the old spring assembly
• Cutting old fixing wire
• Releasing brackets or clips
• Manoeuvring the replacement into the frame
• Compressing spring sections
• Working near sharp wire ends
• Securing the spring unit
• Handling old staples and tacks

Keep hands and face away from components that may move suddenly when released.

Support wider sofa spring units properly during lifting and installation.

Trade Upholstery Spring Units

Livedale supplies pre-assembled upholstery spring units, mesh-top sofa spring assemblies and replacement chair spring interiors to professional upholsterers, furniture manufacturers, restorers and training workshops throughout the UK.

Choose from 22″- and 25″-deep spring units in chair, two-seater and three-seater widths.

Approved trade customers can access preferential pricing across eligible products after registering for a trade account.

Measure the front width, rear width, depth and available height before ordering.