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What is Fusible Interfacing? (2023)

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In your quest as a sewer novice, you may have come across patterns telling you to add interfacing. Most of the time, new creators don’t even know what interfacing is.

This isn’t shocking, because I hid interfacing from view. By the way, there are people who don’t use interfacing at all!

fusible interfacing

By Kelly (Creative Commons Attribution-Share Alike 2.0 license)

Have you ever noticed that when you buy clothes in a store, sometimes there is a hidden layer behind the clothes? You would usually see this in collars, especially in outward facing cuffs, and even in necklines.

If you touch the fabric you would notice that these parts are stiff, this supported extra layer. It is not for aesthetic, as this layer . This layer of fabric the interfacing.

Interfacing is a term used to refer to a piece of fabric attached to the wrong side of a garment to make the garment more sturdy.

You could see it as extra support for clothing; it adds structure and firmness to maintain proper shape and body.


Fusible vs. sew-in interfacing

Interfacing fabric comes in two main types: fusible and sew-in.

These two types refer to how interfacing to your material. Each of them has their own pros and cons, and learning when to use them is an important sewing skill.

Fusible interfacing, also known as iron-on interfacing, derives its name from the word’wick.’The Something literally fused interfacing with your material.

Fusible interfacing has an adhesive layer on one side, which allows it to stick to your fabric with heat. This heat by ironing one side of the intermediate layer so that the glue melts and sticks.

The sew-in layer must, as the name implies, . On. Sew-in interfacing can as you would any other fabric, and can sometimes to as non-fusible interfacing.

Usually you will want to opt for fusible interfacing as it takes less time. and energy costs. However, deciding when to use fusible or non-fusible depends on the properties of the substance to which you want to attach the interface.

interfacing sewing

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Here are just a few materials that you cannot use fusible interfacing on as the fabric would .

Use of thumb to sew in when working with delicate fabrics or fabrics damaged by heat or glue. Otherwise, fusible interfacing will give you the results you need for every day, casual projects.

When to use interfacing fabric

There are three major functions of an interface. First, it adds stiffness to the fabric. You’ll usually find interfacing on the inside of shirt collars so they stand up straight. You can also see interfacing on the inside of the handles of handbags, so they keep their shape.

Secondly, interfacing is used to reinforce a piece of fabric. We often see this in areas where buttonholes or zippers , or on the inside of pockets.

Thirdly, the interfacing helps a project keep its shape. This is especially important for fabrics that tend Totò stretch, such as knitwear.

You may notice that there are bags that hold their shape even if they are unusually soft; interfacing makes this possible.

The color and weight to choose for interfacing

With all different interfacing, how do you know which one to choose?

The two most important elements of an interfacing are color and weight.

Choose color

Interfacing comes in a dark or light shade, and the choice between these usually depends on your own preferences. However, for practicality you should try to match the color of the fabric to which you attach the interface.

Even if it is a hidden layer, there can still be instances where sees through the interface and a huge contrast between the fabric and the interface can look unprofessional.

interfacing sewing

By Kelly (Creative Commons Attribution-Share Alike 2.0 License)

Choose weight

Interfacing is available in three different weights: light, medium and heavy. Patterns usually specify the weight of the interface to use, but if it’s not specified, choosing the weight itself isn’t as difficult as it seems.

Try of thumb, adjust the weight of the liner to the fabric. You can go a little lighter, but don’t attach interfacing that is heavier than the fabric.

If you need a stiffer texture, change the fabric you want. to make sure it can handle the weight of the interfacing – otherwise it will sag anyway.

You can also test different weights on a small piece of fabric to ensure that it has the intended effect. You can see an example of this here.

Here is a video with more information on the basics of interfacing fabric.

Sewing different interfacing

Because your interfacing should depend on the type of fabric you use, there are many options in the current market.

Choosing the right one depends on the fabric you want to attach for, but also on the effect you want to achieve with your fabric.

For a better idea of which match is best, here are a few types of interfacing.

Lightweight fusible interfacing

Lightweight fusible interfacing, as the name suggests, for light and medium-weight fabrics. Its density allows fabrics to provide adequate support without becoming bogged down.

Lightweight interfacing fabrics can still drape and flow while being supported. Because of these properties, a lightweight fusible interfacing is one of the most popular types.

Both hobbyists and professionals would do well to lie around their work area with a few bolts.

Pellon Fusible Interfacing

They also have a wide variety of interfaces to choose from for your next project. Check out their official list

here .Duplex Interface

Duplex Interface is as the name implies; the glue is on both sides of the lining.

You should use double-sided lining when making garments that require fabric on both sides, such as jackets and coats. It also needed this type for reversible garments.

Woven fusible interfacing

Woven fusible interfacing ]

is made of cotton. Upon closer inspection you see that this type is very similar to fabric, with a visible grain line, meaning it will behave like fabric – and should . By Kelly (Creative Commons Attribution-Share Alike 2.0 License)

iron on interfacing

Woven interfacing is perfect for projects where you want to keep the drape of the fabric attached. Note, however, that you should cut woven interfacing along the grain line.

Non-Woven Interfacing

If woven interfacing behaves the same way as fabric, then non-woven interfacing behaves like paper.

This is because a non-woven fabric of compressed fibers. Therefore, non-woven interfacing is stiffer than woven interfacing, and also wrinkles more if applied incorrectly.

While it may seem a better idea to opt for woven going interfacing this is not always the case, especially if you are a beginner.

Beginners usually need stiffer interfacing and woven interfacing

is also more expensive .Unless you sew professionally, you work with a fine fabric (such as silk) or you are making a special project (such as a gift or for a special occasion), non-woven interfacing will suit your everyday needs.

Knit Interfacing

Although interfacing is used to reinforce parts of a project, it will sometimes be necessary to add a brief stretch to that reinforcement. These examples include knitted garments, as well as seams.

Knit interfacing, also known as stretch interfacing, allows you to do just that. Because they by knitting fibers together, they actually stretch.

It is worth noting, however, that knit interfacing horizontally and not vertically. When reinforcing seams in your knit interface, don’t forget to use vertically cut strips to stretch the interface

with your fabric – instead of against it. Using fusible interfacing

Using fusible interfacing

Using fusible interfacing may seem like an enormous hassle, but adding it to your project isn’t difficult.

First off, Resize your interface in advance. This can help you avoid sizing changes after waxing your finished project.

how to use fusible interfacing

By Kelly (Creative Commons Attribution-Share Alike 2.0 License)

To pre-wash your interface, place the entire bolt in a container of water for ten minutes. I should wash fusible interfacing in hot water. Blot the excess water with a cloth and let it dry for at least a day.

This is an optional step. To make sure your interfacing is the best choice for your fabric, test it out on a small piece of fabric by attaching an equally small piece of the interface. If the weight and support are not to your liking, use a different type.

Second, cut your interfacing 1/8 inch smaller than the fabric you want it to be confirmed. This is to ensure no excess glue sticks to any surface other than your fabric. Increase this to 1/4 inch when attaching to thin fabrics.

Third, find out which side of the interfacing has the adhesive part. This side will be bumpy and shinier because of the glue.

Fourth, place fabrics on your ironing surface. Your fabric should be underneath, wrong side up. The interfacing should be on top of your fabric, adhesive side down. Then cover both fabrics with a damp pressing cloth.

Finally, press the iron against the fabric. Do not move the iron as this may cause misalignment of underlying fabrics. Rather, place the iron on the fabric and hold it for about ten to fifteen seconds; the heavier the interface, the longer you have to hold it. Let it cool before moving the fabric.

Here’s a video explaining more about using fusible interfacing.

Why use interfacing?

The truth is that your project will end well without interfacing. If your someone who just sews as a hobby, there’s not much reason to add this tool to your projects unless you think you need it.

As by the way, unless you progress in learning to sew, you’re unlikely to come across interfacing, and most sewing guides won’t include it at all.

The more advanced you become, the more often you will encounter it. Most of the time, beginners will not even know what interfacing is, even if experienced craftworkers consider it an important part of any project.

There are many people who feel that beginners do not need to worry about learning to use interfacing, and there are others who believe that learning earlier is better.

However, it that interfacing offers a level of quality and sophistication that cannot by projects made without interfacing, no matter how good those projects are, or how expensive the materials they with.

Although it may seem like an unnecessary step, adding interfaces can significantly increase the finished quality of your project. Indeed, ignoring the interface is a beginner’s mistake; sagging and unstructured areas can make an entire dress look shabby.

Projects made with interfacing just look better. Not to mention it will benefit your project more than adding body and reinforcement.

interfacing fabric

Due to the reinforcement interfacing provides, this means your garment more wear and tear and will have to be replaced much later than without interfacing.

Evenif it takes more time, money and energy, interfacing will pay for itself.

Interfacing as a new skill

Whether you choose to interface your next project or not, learning how to interface is a great way to take your craft to the next level.

Understanding how fabrics interact with playing together and how they depend on other fabrics for their shape and texture is a great way to enhance your craft.

Nonetheless, if you ever need a quick, inexpensive way make your clothes more sturdy and look great, fusible interfacing will always be there for you.

Do you have any tips for sewing interfacing?

Avatar for Mutasim Sweileh

Mutasim Sweileh

Mutasim is the founder and editor-in-chief of, a site dedicated to those passionate about crafting. With years of experience and research under his belt, he sought to create a platform where he could share his knowledge and skills with others who shared his interests.