The sofa sags. Restoring upholstered furniture with your own hands: tips with before and after photos

Furniture can be expensive or not, high or low quality. Regardless of this, through certain time it wears out and it becomes necessary to repair the sofa yourself. All the work can really be done independently; it is enough to have basic work skills, the necessary tools and materials.

If you have old sofa with a frame made of chipboard, then it will be more difficult to repair it than one that has wooden frame, but everything will depend on the condition of the frame.

In order to repair a sofa with our own hands, we need to know its design.

Design Features

Exist various models sofas, but almost all of them consist of basic elements:

the armrest can be soft or not, made of metal, wood, chipboard or MDF;
upholstery material can also be different: leather, leatherette, fabric;
a layer of batting or padding polyester, furniture foam rubber is usually used as a filler;
to improve shock absorption, in some models a layer of polyurethane foam is installed;
the main shock-absorbing element is a spring block;
burlap is used to ensure that there are no extraneous sounds when rubbing against plywood or metal;
The sofa frame is made of wood or chipboard.

Your sofa may not have all of the listed elements, but now you will know their name and purpose.

In many ways, the durability of your sofa will depend on the quality of the frame and the material from which it is made. The service life of the sofa, the comfort of its use and environmental friendliness will depend on what filler is used.

Disassembling the sofa should begin by removing the sides, after which the back and seat elements are removed.

Types of transformation mechanisms:

the most common is the sofa book;
when using a Eurobook, the seat extends and the back rests in its place;
the Eurobook does not move out tick-tock, but moves in a circle;
the accordion type consists of 3 parts, but it is practically not repairable;
the use of a click-clack mechanism allows you to make 3 positions: in the form of a sofa, in a semi-unfolded state and in the form of a bed;
The dolphin mechanism is used in corner sofas.

In the event of a breakdown, the transformation mechanism of the old sofa must be replaced only with the one used in the specified model.

If we talk about fillers, one of the best is considered to be a spring block covered with batting and burlap, but this option is expensive, and often foam rubber and calico are used to reduce the cost. The cheapest models do not use a spring block; instead, several layers of polyurethane foam or similar material are placed.

Since you are renovating an old sofa for yourself, you need to use high-quality materials. Polyurethane foam must be at least 40 mm thick. Using holofiber allows you to do wet cleaning sofa Sintepon does not absorb moisture and makes the furniture textured.

For spring block A padded jacket works well - 5 cm of cotton wool, covered with a layer of coarse fabric. Periotec holds its shape well, has high strength and heat resistance.

The upholstery is fabric or leather. Working with leather is quite difficult, so this work must be done by specialists. You can work with fabric yourself; it is divided into woven and non-woven textiles. Most often, when deciding how to repair a sofa, the following fabrics are used: flock, velor, jacquard, chenille, tapestry.

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Sequence of work

Knowing all the main elements of the sofa and the materials that are used for its restoration, you can begin to carry out the repair itself.

To complete the work you will need:

screwdrivers;
pliers;
stapler;
wood glue;
hammer, scissors;
screwdriver and screws.

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Upholstery replacement

Before you begin the repair, you need to disassemble the sofa. It is necessary to remember the location of the parts so that you can put everything back together later. To simplify the assembly process, you can use a camera or video camera during disassembly.

First, remove the armrests; they can be combined with the legs. The sidewalls are attached to two bolts; to unscrew them, you need to lift the seat. After this, the transformation mechanism is removed and unscrewed from the frame, seat and backrest. Now they dismantle the remaining parts of the sofa until only one frame remains.

The upholstery must be removed carefully so as not to damage it, since it will then be used as a pattern for cutting out new upholstery. If the mattress is in good condition, then there is no need to disassemble it.

In order to make a cover, you need to have basic sewing skills. If the sofa complex shape, then you will have to work harder. The finished case is secured with staples. If the stretching is carried out manually, then first the fabric is secured with front side, at the attachment points it must be folded in half. After this, they are fastened on the opposite side, and then in the corners, making sure that the fabric is taut and there are no folds.

The upholstery on all other structural elements is replaced in a similar manner. After this, the sofa is assembled in the reverse order.

During use, upholstered furniture wears out and loses its original appearance. Dents in the seat, failure of the spring unit and damaged upholstery are the most common problems. You can solve them without serious expenses by repairing the sofa yourself, without resorting to the help of professionals. The work does not require special skills, but it must be done carefully and consistently.

All upholstered furniture, regardless of design, includes basic elements. This:

frame consisting of solid wood, metal or chipboard;
soft part (foam rubber filler, spring block);
upholstery, which uses furniture fabric, natural or artificial leather.

The sofa can be a sleeper or intended exclusively for sitting. Folding, in addition to the listed elements, has special mechanism transformation, with which you can organize a place to rest at night. Failure of its elements - main reason why the sofa is not functioning well. For restoration, you will have to determine the type of mechanism in order to repair it or install a new one. The most popular are:

"Book". The most common. To recline the sofa, you need to raise the seat until you hear a click and then lower it.
"Eurobook". The seat moves forward and the backrest lowers into the resulting space.
“Click-clack.” Models with this mechanism have metal carcass, in this case, you can transform the sofa in 2 ways - completely or in a reclining position.
"Accordion". The back of the sofa is double-sided. It rises, extends, both parts straighten. Most often, due to high load, the elements of the mechanism are deformed; they cannot be repaired; replacement is necessary.
"Dolphin". Most often found in corner models. The lower part of the sofa moves forward, which is leveled to the height of the seat using pillows or filler.

If the mechanism is not broken, but it is difficult to transform or the sofa does not fold out, you need to inspect the structure and find out what is stopping you normal operation. Perhaps some furniture elements are bent or rusted. In this case, you can try to solve the problem without completely changing the mechanism. Other common breakdowns and methods for eliminating them are presented in the table.

Problem	Cause	Solution
The seat is pressed through	Filler deformation	Replacing foam rubber in a sofa with your own hands or to order. They use a special furniture one, the thickness of which is from 40 mm or more.
Creak when pressing on the seat, uneven surface (dimples and bulges)	Spring unit malfunction	Inspection of the spring block, assessment of its condition. Repair or complete replacement
The sofa fell in the middle	The problem is in the frame	The frame is a frame made of wood or metal, covered with sheet material on top ( furniture board, plywood or chipboard). It is the upper part that experiences a lot of stress, so it can crack over time. It is necessary to dismantle the damaged element and install a new one. If a wooden frame is cracked, disassemble it completely, make a part with similar parameters and replace it. It is impossible to repair a metal frame at home - you will need a welding machine
Torn, frayed or stained upholstery	Wear, mechanical damage	Furniture reupholstery

Eurobook

Click-clack

Accordion

Required Tools

Before you begin home renovations, the furniture needs to be disassembled. Should be prepared necessary tools, consumables and new materials to replace those that have become unusable. To repair a sofa yourself you will need:

screwdriver;
flat screwdriver;
open-end wrenches (diameter 10, 12, 14 mm);
pliers;
corner key.

To troubleshoot problems you will also need:

self-tapping screws;
wood glue;
furniture stapler and staples;
construction knife;
roulette;
pencil.

To replace the upholstery, you will need furniture fabric or leather, to restore a dented sofa - a new spring block, filler (foam rubber or polyurethane, as well as padding polyester or batting). To repair the frame you will need bars and sheet material(plywood, chipboard). When performing repairs corner sofa equipped with a dolphin retractable mechanism, new rollers may be required. In cases where the metal frame is bent or cracked, you will not be able to straighten it yourself; you will need to replace the elements.

Tools

Repair materials

How to disassemble a sofa yourself

Repair work begins with disassembly. As you work, it is recommended to photograph each step so that during assembly you can see if everything is being done correctly. Procedure:

Removing the armrests. They are fixed to the frame using bolts on the sides wooden frame. To open access to them, pull out or lift the seat (depending on the design of the furniture), then unscrew the fasteners with keys of the appropriate diameter.
Removing the transformation mechanism. It is attached to the sides of the frame, backrest and seat. Using a screwdriver or Phillips screwdriver, unscrew the fasteners.
Removing the backrest and seat. Both elements are connected to each other by a transformation mechanism. After removing the latter, they are easy to detach from each other and from the frame. In some models, the backrest may be screwed to the frame, then you need to remove the bolts holding it.
Removing the upholstery. The back and seat are turned upside down using flat screwdriver carefully pull out the staples holding the fabric to the frame. Each piece of material is signed or marked so as not to get confused when re-stretching.
Removing the filler and spring block. Between the upholstery and the foam rubber there is usually a layer of batting or padding polyester. Carefully remove it, unfastening the staples, then inspect the filler. If there are noticeable indentations, dirt or signs of destruction on it, remove it. Assess the degree of damage to the block. If there are burst springs, broken connections, or bent areas on the frame, you will have to replace it with a new one. The old one is removed by removing the nails or staples from the frame.

Removing the upholstery and further actions are performed only if the upholstered part of the sofa is repaired or the upholstery is changed. If there are problems with the frame or transformation mechanism, a complete disassembly is not required. In order to most accurately understand the possible scope of work, you should first familiarize yourself with thematic videos, for example, on the topic “Repairing upholstered furniture.”

How to repair it yourself, taking into account the type of damage

The sequence of repair actions depends on the type of breakdown. Often it is necessary to perform several operations at once. For example, along with changing the spring block, you can replace the foam rubber in the sofa.

Soft part

If the sofa sags and when you press on the seat, dents remain on it, then change the filling. After disassembling the furniture, removing the upholstery and internal contents, they begin cutting out parts from the new material. In a sofa, replacing foam rubber is done as follows:

Spread a piece of new foam rubber on a flat surface and place the old one on top. Using a pen, trace the contours, construction knife cut out.
Place the workpiece against the frame, check for any protruding parts, and cut off the excess if necessary.
The lower part of the part is coated with wood glue.
Place the workpiece on the frame and press firmly evenly.

After the glue has dried, a layer of batting or synthetic padding is laid on top of the filler, attaching the edges of the material to bottom side frame with a stapler. The sofa is then covered with new upholstery. To increase the service life of furniture fabric, a non-woven lining can be additionally used.

On new piece foam rubber put old

We trace the contours with a pen

Cut along the contour with a construction knife

We attach the workpiece to the frame

Coat with wood glue

Place the workpiece on the frame and press firmly

Spring block

Replacing the spring block is not always necessary - if the main part is intact, then you can try to repair it problem areas. To do this you will need pliers, wire cutters and small diameter hardened wire. They start by inspecting the block. Bent springs can be returned to their original position using pliers without dismantling or disassembling the structure. If elements are damaged, they are replaced with new ones. To do this, carefully cut off the problematic spring with pliers, and install a new one in its place, tying it to the block with wire.

If there are a lot of broken springs in the sofa, you will have to completely dismantle the unit and install a new one.

Scheme of the spring block “snake”

Use pliers to straighten the bent spring

Damaged spring

We connect the springs to the block with wire

In budget models, instead of a spring block, a “snake” can be used - a structure made of individual thick springs attached to the sides of the frame at an equal distance from each other. The repair in this case is simple. Usually the loss of elasticity of the seat is caused by the detachment of one or more elements from the frame, so it is enough to fasten the spring back. If these products are cracked and there is no way to find new ones, textile belts are used. Procedure for repairing a spring block in a sofa:

The tape is wound on a wooden block.
The free end is applied to the place where the removed spring was located. Bend the tip and use furniture stapler securely attached to the frame.
Apply the tape to the opposite end of the frame. To ensure high-quality tension, the bar is pulled back and the textile sling is nailed with staples, and the secured piece is cut off from the main skein.

In this way, you can not only solve the problem of missing springs, but also additionally cover the entire frame in order to extend the life of the “snake” and give the seat greater elasticity.

Using textile tape we strengthen the “snake” spring block

Frame

To repair the frame, the armrests, upper and lower parts of the structure are dismantled. Inspect parts and identify damage. If there are cracks in the frame, disassemble the structure completely, take measurements of the broken element and make new part. For its manufacture, only dried wood is used - raw wood is deformed in the process, which will lead to new problems. If you don’t have the skills to work with the material, order a part according to your dimensions in a carpentry shop, then reassemble the frame. If necessary, strengthen the frame by installing additional transverse joists, screwing in furniture bolts or self-tapping screws at the joints of parts, and coating areas with a tongue-and-groove joint with wood glue.

Crack in the sofa frame

Cutting out a new one wood block and fasten with self-tapping screws

Transformation mechanism

Repair of a folding sofa most often involves replacing the transformation mechanism or its individual parts. Rust on this element may prevent you from laying out the sofa normally. To remove it, use special anti-corrosion sprays, for example, WD-40. The liquid is sprayed onto problem areas, and after the time indicated on the package has passed, wiped with a dry cloth. After this treatment, all parts are lubricated. Repairing the mechanisms of sofas with damaged (bent, cracked) elements is useless; a complete replacement is necessary. You need to purchase a structure of the same type and install it in place of the old one.

Sofa transformation mechanism

Lubricate individual parts of the mechanism with anti-corrosion agents

Case and cover

After disassembling the sofa, carefully remove the upholstery from all parts. Then:

Lay the furniture fabric face down on the floor and straighten out all the folds.
Lay old covers on top of it. Trace the contours with tailor's chalk, making allowances of 5-7 cm on each side.
Cut out patterns with scissors.
The cut fabric is spread on a flat surface with the wrong side on top. The part to be covered is placed on it, face down.
The edges of the upholstery are brought to the back side and secured to the frame using a furniture stapler. The fabric should be stretched enough so that folds or wrinkles do not form on the surface of the product.
First, the material is secured with 2 staples on each side, then, straightening it evenly, they are driven in along the entire perimeter of the frame.

Repairing sofas on your own is not a technologically complicated process, but it requires care and precision. With the right approach, you can return furniture to its functionality and original appearance with minimal costs. The restoration time will depend on the skills of the master and the amount of work.

We spread new furniture fabric on the floor, put old covers on it and make patterns

Intense operating loads to which a sofa in any family is exposed every day inevitably leads to wear and tear of the product. The structure becomes loose, the upholstery wears out, the folding mechanism begins to play tricks - these are signals that it’s time to restore your favorite furniture. When it is not possible to turn to specialists for help, restoring a sofa with your own hands will also help restore its luster and comfort. Do-it-yourself repairs and updating save on expensive professional services, while you can be 100% sure that all stages of restoration were carried out conscientiously.

Before you begin restoring a product, you should determine which parts need updating. The wear process is accompanied by violations in the design and appearance products. Sometimes it is enough to update the upholstery, but most often all structural elements need repair and restoration. It's time to restore the sofa if:

The fabric or leather covering has become dull, abrasions and tears have appeared. The filler hidden under the upholstery has become less elastic, and sagging spots have formed on the seat - in this case, replacement of materials will be required.
The structure became loose and the integrity of the internal fastenings was damaged. A loose frame must be repaired, but if the sheathing boards are cracked or broken, they will need to be replaced.
It has become difficult to unfold and fold the sofa, it requires effort, and the transformation mechanism gets stuck. Problems may be associated with deformation of the fittings or weakening of the return springs - they will need to be replaced.

It is advisable to use components from the same manufacturer that were originally installed, otherwise incomplete fit of the parts and rapid failure of the mechanism are possible.

Required tools and materials

To restore the covering and interior of the sofa you will need upholstery fabric, filling, padding polyester, non-woven fabric. It is not necessary to use the same “filling” as it was. You can purchase better and more modern material.

Before you restore an old sofa with your own hands, you need to prepare the following tools and consumables:

spanner wrench or pliers;
screwdriver;
screwdriver set;
furniture stapler, needle with a large eye, strong nylon thread;
tape measure, pencil, chalk for cutting (or soap);
universal adhesive (for fixing sheets of soft filler, repairing frame elements);
screws, metal tongues.

To process repaired chipboard parts, you should prepare sandpaper. And for servicing the folding mechanism - a suitable lubricant.

Without experience in calculating the material for replacing upholstery and filling, you should not purchase it in advance. It would be more correct to go to the store after removing the old coating and measuring it.

Stages of work

Each stage of restoring a sofa with your own hands must be approached with great responsibility, because even with minor mistakes, the final result will be poor. Repairs take several days, so it is recommended to place the furniture in a separate room. The procedure consists of a number of stages:

preparation and disassembly of worn-out products;
marking and cutting of material;
tightening of soft seats and backrests;
repair of the frame and metal elements of the folding mechanism;
assembly of updated sofa parts.

Disassembling and reassembling the sofa is easier and safer with an assistant.

Preparation and disassembly of the product

The work begins with dismantling the structure and assessing the scale of the restoration. Operations are carried out in the following sequence:

The sidewalls with armrests are dismantled (the fastening bolts are located with inside, to remove them you will need either a hex wrench or pliers).
The seats and backrest are removed. If there are retractable parts, they are also dismantled. After disassembly, you need to check the condition of the frame elements for any breaks or cracks. In case of folding sofa with a retractable sleeping block - disconnect it.

When removing fittings, they should be placed in separate bags and labeled so as not to be confused with each other during assembly.

Once the product is disassembled, you can begin removing old upholstery. To do this, all staples securing the material are carefully removed. Under the finishing fabric there may be several layers of felt or synthetic padding, which are also removed for replacement. Next, you need to remove the filler, checking it for integrity and possibility reuse. If it is necessary to replace it, you will need to approximately estimate the size, thickness and number of new plates.

If the furniture is more than five years old, it is not advisable to leave the old filling when restoring the sofa, even if the foam looks intact and not dented.

The last thing to evaluate is the condition of the springs. If there are no burst parts, play, cracks, or squeaks, there will be no need to restore this element. Nice block can last for several decades.

Sectional sofa

Dismantling the sofa

Selection of materials

If you plan to update your sofa at a minimum cost, you should choose practical ones. inexpensive materials. Can be used as upholstery furniture fabrics or eco leather. It is worth keeping in mind that the cost of leatherette is higher, and working with it is much more difficult than with woven-based materials. Fabrics used for upholstering furniture must be wear-resistant, environmentally friendly, and practical. Perfect for:

classic jacquard;
chenille;
inexpensive velor;
flock;
microfiber;
tapestry.

Polyurethane foam, foam rubber, and latex can be used as filler. Foam rubber is considered to be the cheapest option; its average service life is 3-5 years. It provides the required softness, but over time it loses its ability to restore its original shape. The best option when restoring a sofa with your own hands, latex is considered. It is distinguished by its environmental friendliness, optimal elasticity, durability, and its porous structure eliminates the possibility of mold. The only drawback is the high cost. Due to its good price-performance ratio, the most popular material is polyurethane foam. It is quite elastic, does not deform over a long period of time, and provides high level comfort.

Microfiber

Repair of elements

In most cases, the transformation mechanism, frame and spring block must be restored, and the substrate and cladding material must be replaced. Work with parts is carried out in the following sequence:

Renewing damaged or rotten frame elements. Heavily worn wooden blocks need to be replaced with new ones, minor chips should be treated special composition to protect wood. Laminated chipboard is the most fragile element: even if small cracks or deflections are detected on any part, it must be removed from the structure and then a new one installed.
Repair and replacement of transformation mechanism parts. The latter is in most cases represented metal elements, which can only deform under heavy load. A bent metal support should not be straightened; it is better to replace it immediately. The type of repair performed depends on the extent of the damage. In case of slight deformation, it is enough to apply force with your hands in the direction of straightening; severe defects are removed by welding or replacing the part. The spring folding mechanism, as a rule, does not need major renovation. Usually it is enough to slightly correct it, remove rust from all parts using WD, and, if necessary, treat it with machine oil or other lubricant.
Updating the filling, covering the elements with new upholstery. The filler is placed on a felt base and glued. Between it and the covering fabric it is necessary to lay padding polyester or holofiber. Restoration upholstered furniture Doing it yourself is often considered impossible precisely because of the difficulties with sheathing, but with a careful consistent approach the result will be no worse than that of professionals. When cutting yourself upholstery fabric A margin of about 5-10 centimeters should be left along the edges of the workpiece. Size adjustments are made immediately after measuring the dimensions of the seat and backrest. It is necessary so that the material can be hemmed at the places where it is attached. The new upholstery should not be pulled too tightly, step by step, adjusting the folded material every 8-10 cm.

To calculate the amount of fabric and subsequent cutting of the new covering, you should take measurements from the old covers.

Lubrication points for the folding mechanism

Frame repair

Installing a spring block

Removing old upholstery, cutting fabric

Updating the filling, covering the elements with new upholstery

Upholstering a sofa with new fabric using a stapler

Old furniture after for long years use becomes unusable. The sofa looks like an old, humpbacked camel, the fabric on the sides is worn out, and when sitting in a chair, can you reach the floor with your heel? A completely logical question arises: what to do?! Throw it away and buy a new one or restore it? In our case, start repairs immediately!

To restore an old sofa we will need:

Manual stapler with 6-8 mm staples,
Hammer, pliers, set of keys (13, 14, rarely 17),
A screwdriver with a thin blade for pulling out old staples,
Awl, needle (crescent), thread, wide belts, scissors,
Upholstery materials.

Materials

For upholstery, it is best to use high-quality material such as velor, matting, chenille, jacquard, etc.

Matting Chenille Velor Jacquard

As a filler in furniture production use spring blocks or foam rubber. To replace them you need to disconnect sleeping area from the linen pallet (sofa) using wrench. For ease of work, you can use a table that will not only reduce disassembly and assembly time, but also preserve your health.

Dismantling the sofa

The upholstery fabric can be removed using special device. This is an ordinary screwdriver, sharpened in a special way (for pulling out staples), or factory staple removers.

Such devices are not only effective, but also safe, as they completely protect your hands from involuntary slipping.

We must not forget that repairing sofas at home is considered unsafe, so excessive forethought and caution will not hurt.

After we took off old fabric, you can begin to replace the spring block or those springs that are broken.

Changing a spring block at home is very problematic; it must be ordered from the manufacturer, and this takes time.

Replacing sofa springs

A marker indicates a broken spring. Spring block after repair.

Using pliers, unscrew the spiral tape; if it is a rope (twine), then cut it off.

We install the new springs in place, and do not forget to secure them to the bottom of the frame.

It is necessary to lay batting under the springs so that the springs do not create an unpleasant sound while sitting or sleeping.

Methods for tying springs Method for passing twine

It is very important to know and follow correct technique upper weave to maintain uniform protrusion of the springs in height. You can use the options suggested above.

When the springs are replaced, we lay upper layer hard batting to prevent the springs from touching the fabric.

Sewing covers

Let's start cutting and sewing a cover for the sofa. In order to make the task easier, you can use the old cut, having first measured all the sewing details.

We remove the old fabric from the sofa. We carefully sew the seams into individual parts using a special steaming device. If there is such an opportunity, time and desire, then each part can be ironed well to maintain its original dimensions.
After ironing, it is advisable to number the parts so as not to get confused in the future. We lay out everything we got on a new piece of fabric.
You need to try to arrange them so as to “fit” into a width of 1 m 40 cm - this is standard width. Pay attention to how the fabric fibers run. Longitudinal ones can be used on the seat and back, and transverse ones are best used on the sides.

Difficulty may arise if the fabric has a pattern. It is necessary to extremely accurately calculate the moments of joining, for example, strips, in order to avoid unnecessary consumption. The direction of the pile is also taken into account, this is especially visible on velor fabric.

Always buy fabric with a reserve. Take at least 100 mm of extra length and width!

When all the parts have been cut out, the frame has been previously repaired, the springs have been changed, new batting is in place, only then can you begin to adjust the fabric cover.

All seams are basted by hand. Marking needles can be used for fixation. Where the fabric sags, you don’t need to cut it right away, measure everything to the end and only then can you cut and sew it up.

If the work involves sewing machine, adjust it for the appropriate fabric. Check the quality of the seam on a separate piece. Where there will be allowances, make small cuts, especially in those places where the fabric runs at a right angle or along an arched line.

When the cover is sewn, you can try it on.

Upholstery of a sofa with fabric

The next stage, the final one, will be shooting the remainder of the fabric onto the fold.

It is best to secure the fabric in four places; this will serve as a kind of beacon.
We begin hammering in staples at intervals of 2-3 cm, while simultaneously ensuring uniform tension along the edges of the frame. There should be no overtightening or sagging. We do the same with the chair.

This is what it looks like at first glance in a simple way You can do the restoration of an old sofa with your own hands!

It happens that after several years of use the sofa needs to replace the spring. What to do: send it to a landfill or try to correct the situation? Let's talk further about how to repair sofas at home yourself, replace springs, their type characteristics and much more.

When to replace

The sofa has several structural elements that provide its user with high comfort, comfortable rest, and relaxation of the muscles of the musculoskeletal system: springs, frame, upholstery. When choosing a specific model, you need to pay attention to their quality so that the product long time no repairs were required.

If upholstered furniture is made from quality materials, it will be different long term services. But sometimes even first-class models need repairs after some time of use.

Sofa arrangement diagram

Replacing the spring system of sofas different sizes, colors and configurations are required in a number of cases:

The model served for a very long time, so the springs weakened their effect. As a result, there are dents and bulges on the sitting surface, and the product is not very comfortable to use, especially when unfolded;
furniture needs to be repaired if the spring structure used in the manufacturing process had a manufacturing defect, low quality, and so on, but this fact became clear only after using the furniture for some time;
repairs may be necessary when the level of rigidity of the spring elements was chosen irrationally, that is, they do not suit its owners in terms of comfort and rigidity. But, unfortunately, such a characteristic as the level of rigidity cannot be significantly adjusted. You can either replace the spring system with a different model, softer or stiffer, or slightly soften the mattress using foam rubber.

Dents on the sofa

Types of springs

One of the most important criteria, from the point of view of the comfort of such furniture, is a block with practical springs. Repairing sofas at home may require replacing all the elements, but before you start, you need to determine what type of these elements are present on the sofa. Modern manufacturers use these types of springs.

Types of springs	pros	Minuses
	Simple design, high comfort, long service life, affordable cost.	High softness, the ability to sag (hammock effect), which is why they are rarely used for the manufacture of seats for folding models.
Solid Bonnell block	Affordable cost, wide distribution, durability, high comfort.	It may creak over time; if individual springs are damaged, the entire unit will need to be replaced.
Block of independent springs	Each spring is isolated from the rest, so this option provides the person sitting on the sofa with the maximum level of comfort.	High price. If one or two elements are damaged, only them can be replaced.

Note that the service life of the described types modern systems different, which also affects the final cost of the sofa. The most durable and expensive are designs with a block of independent springs, and the most affordable options are those with a flat spring snake.

Bonnel block

Independent springs

Snake

Required Tools

Repairing a sofa in the living room or kitchen yourself allows you to save a lot, because the services of professionals in this area can be expensive, and the springs they offer to replace old ones can have more high cost than their counterparts in the store. It’s not difficult to replace sofa springs with your own hands if you prepare for the job carefully: purchase new ones structural elements, acquire up-to-date tools, compose detailed instructions performing operations.

To repair a sofa spring unit yourself, you will need to have the following tools at your disposal:

yardstick;
a wrench for disassembling the sofa frame;
a flat-head screwdriver for removing staples on the upholstery;
pliers for replacing metal products;
a stationery knife or scissors for cutting the underlying layer;
construction stapler for fixing upholstery to the frame.

Tools

How is the replacement done?

If you want to repair your sofa without hiring the services of professional furniture makers, you should carefully study the procedure. You need to start by disassembling the sofa, or rather, by disconnecting its side parts using a wrench. Do not allow these structural elements to fall freely after dismantling; mark each of them so as not to confuse the left and right parts during subsequent assembly. Next, the mechanisms are dismantled, the seat, the backrest and, if present, the tray are disconnected one by one.

To remove the covers you will need to use pliers. Using them, carefully, without jerking, pull out the fastening brackets. Otherwise, the upholstery may be damaged.

Disassembling the sofa should begin by removing the side elements

Unassembled sofa

Pull out the mattress, proceed to repairing the springs. Using a damp rag, you should remove dust from the surface of the structure, and then carefully inspect all the springs. Remove damaged springs using pliers and replace with new ones. Next, cover the spring block with foam rubber or other material to increase its service life.

Carefully remove the upholstery

Damaged spring

Spring fastening options

The fact is that when using a sofa, differences are created between those springs that are pressed by the person’s weight, and those springs that remain unused. This leads to deformation of the spring block and the need for its repair. If you fill the gaps between the springs with foam rubber, and also cover the entire mattress with similar material, this can somewhat smooth out the load difference. Ultimately, the sofa mattress will last longer.