Felt fabric is believed to be amongst the oldest forms of fabric in existence. It’s unique in its construction, texture, and its numerous uses — ranging from clothing such as hats, coats, and boots, to crafting materials and, yes, even rug pads.
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But what is felt really? We're glad you asked.
Felt is a fabric made from natural or synthetic fibers that are interlocked or matted together. It’s mostly made from wool but it can also be made from synthetic fibers, such as acrylic and rayon (think yarn fibers).
In general, you’ve got three main categories of felt: natural fiber, synthetic fiber, and combined.
Natural fiber felt can come from cotton, animal fur, or wool. To create combined felt — you guessed it — you combine the natural with synthetic such as acrylic, nylon, or polyester.
However, felt is a bit more unique than you might think. Unlike most fabrics that are woven or knitted together, felt is made from a process that combines heat, moisture, and pressure to form an interlocked, durable fabric.
We don’t have much consensus on the origins of felt fabric — it’s THAT old. Most likely it originated in Asia several thousand years ago, where they used it to make tents and clothing.
Regardless of where felt came from, one thing is clear: felt has withstood the test of time. Basically, it was damn good back then, and it’s still damn good now.
Felt is made by applying heat, moisture, and pressure to fibers to interlock them into a durable fabric. The general method of making felt has remained unchanged over the years, but some differences do exist.
Here’s how people get it done these days (with wool). This is a kind of long process, so buckle in.
For combined felt, the natural and synthetic fibers go into big open cylinders that have steel nails inside to help with combining the different fibers.
Afterward, they are carded and the rest of the process is similar to what we outlined for wool felting.
As we mentioned, there are three main types of felt: natural, synthetic, and combined.
But! There’s also different types within that too. Let’s dive into a few of those here.
Alright, this is probably the type of felt you know the best. The felt you’d find in a kid’s project or what you’d find at Michael’s.
These are synthetic felt fibers that use interlocking acrylic. Why is this the OG crafting felt? A few reasons.
First, they’re stiffer than natural fiber felt, yet easier to cut. Two, they’re cheaper than other types of felt. And three, they can take on different pigments really well so you can dye them all different types of fun colors.
Made from recycled plastics, these are similar to acrylic felts (made by interlocking plastics), but more eco-friendly (surprise surprise). This type of felt also makes excellent craft material because it's stiff, coarse, and waterproof.
Eco-friendly felts can be made from recycled felt, yarn fibers, or leftover carpet fibers. Considering the “eco-friendly” in the name, it makes sense that this felt doesn’t use any chemicals, glues, or adhesives so they’re non-toxic — great for kiddos.
The Eco-Plush rug pad is one such example of this. (So I mean, we’re not biased or anything, but it’s basically the best kind of felt fabric. ????)
This material is made from mixing wool with synthetic fibers, such as acrylic. The two most common ratios that exist for this combination are:
These are good for crafts, but you’ll also see this felt in accessories like pillows or plush toys because they have a firm yet soft texture.
100% wool felt is made by interlocking wool fibers together to create a fabric that doesn’t wear down easily. (That whole process we explained earlier.)
Under a microscope, the surface of wool appears to have scales. The felting process interlocks these scales, creating a durable, water-resistant material. This would be the type of felt that people used way back when for clothing, especially in rainy climates like England and Scotland (think kilts).
It’s non-flammable, too — wool singes and the flames simply go out. This makes it ideal for lining fire-fighter uniforms because while it’s non-flammable, it’s also lightweight so it doesn’t slow the firefighters down or impede their movement.
Felt, unlike most other fabrics, is not woven or knit, meaning it doesn’t have warp and weft threads (the vertical and horizontal threads in weaving). This means that it doesn’t easily fray at the edges, and also makes it easy to cut and work with (since cutting it will not destroy the integrity of the entire fabric).
Felt is also durable because many layers are interlocked in its construction. It’s water-resistant and non-toxic.
What’s so good about felt? Everything.
Okay not everything, but felt does have a lot of benefits. Specifically, it’s durable, warm, lightweight, protective, insulating, and soundproofing. Let’s dig into those a bit more.
Due to the interlocking process used in manufacturing, felt is strong and durable. Seriously, felt can take a beating and be just fine.
In terms of rug pads, this makes your pads durable and long-lasting.
The fibers in felt are lightweight, but you’ve got a TON of them all interlocked together so they’re also warm. Interlocking creates the lightweight quality of the fabric, as it’s compressed through pressure being applied when matting the fibers.
Keep in mind, because of the density, felt isn’t going to be your ultra-lightweight performance clothing. But unless you’re clocking crazy miles, you probably wouldn’t notice the weight so for the amount of warmth it provides it’s pretty damn good.
Plus, when used in rug pads, that weight and density can actually be nice — it can help keep the pad flat and adds more cushion to your rug. However, since the pad is still fairly low profile (the whole density thing) the felt is unlikely to raise your area rug too high up, so the rugs aren’t a tripping hazard.
Felt is used for lining clothing such as boots and coats for the winter season because it’s warm, lightweight, and water-resistant. That doesn’t mean waterproof, it’s just that wool fibers naturally have some water resistance, especially when tightly woven together like with felt (have you seen where sheep live?? They need some water resistance).
Because it’s water-resistant, felt is also good for rug pads. Any liquid will take a moment before starting to soak in. And even then the recycled felt we use is pretty great at absorbing liquid too. This gives you time to clean any spills before they can damage your floors.
Plus, since the felt is only water-resistant and not non-porous waterproof, it means the material is also breathable. What’s the benefit to that? It means you’ll have airflow between the rug and floor. So, even if liquid were to get under the pad, it wouldn’t get trapped there—it could simply evaporate up through the pad.
Because many layers of felt layers are interlocked together during felting, the resulting fabric is excellent for insulation and soundproofing. They have premium cushioning and are able to absorb sound.
What is this quality good for? You guessed it—rug pads.
Especially in a multi-storied house or apartment complex, the extra soundproofing can be a massive benefit to keep the peace between neighbors.
(P.S. The Eco-Plush rug pads we carry have excellent soundproofing. ????)
Nothing’s perfect and felt certainly isn’t an exception here. We want to make sure you really know felt — the good, and the bad.
Even though felt is a strong, durable material, it can be destroyed by moths. The whole natural thing? Moths are a big fan of that too, unfortunately. Specific species of moths actually feed on animal fibers like wool, so your wool clothing is an all-you-can eat buffet to them.
(Note: our rug pads use recycled synthetic felt, so you shouldn’t have to worry about the whole moth issue if you’re thinking of getting a felt rug pad.)
Felt is not a grippy fabric. This is great for socks when you want to go sliding around on wood floors.
(source)
Not so great when your small area rugs go slipping out from under you (or under your dog). For this reason, some manufacturers use adhesives to ensure that rug pads stick to the floor (which in itself can be damaging to the floor).
Instead, we design our non slip rug pads to grip the floor by adding rubber backing.
The Contour-Lock and Superior-Lock rug pads both use felt with a natural rubber backing.
The manufacturing process of felt can often make the surface a bit coarse and rough, so it can be a bit scratchy on the skin (especially synthetic felt). It’s still a soft enough surface that it won’t scratch floors or even be that uncomfortable on the skin, it’s just not going to compare to something like fleece or alpaca wool when it comes to softness.
Still have questions? We’ve got you covered. Check out these other commonly asked questions about felt that we’ve answered here for you.
Contact us to discuss your requirements of fire resistant felt. Our experienced sales team can help you identify the options that best suit your needs.
Melton is similar to felt and is often mistaken for it.
Melton is a woven fabric, but the finishing of melton makes it shrink and appear matted like felt.
Felt can be bought by the yard or in pre-cut felt sheets. Michael’s or similar crafting stores are good places to buy felt. Most crafting or fabric store should carry some felt.
(Though keep in mind, this is just felt, not made for anything specific — if you want something specific for say, rug pads, we’ve got you covered with our 100% felt rug pad.)
Yes, felt can be washed. We recommend washing it by hand using cold water to avoid shrinking though.
Felt fabric is water-resistant — not fully waterproof. Think of it like a thick fuzzy jacket in the rain that isn’t necessarily a rain jacket; it’ll keep you dry for a while, but eventually you’ll get wet.
Yes, it’s a non-woven fabric made from interlocking fibers.
Yes, it’s a strong material. However, it’s not like steel metal-level strong — it’s still a fabric and if you push it too hard, those interlocking fibers can come apart.
100% wool felt has the best quality for water resistance, comfort, and durability — but it can also get eaten by moths.
No, they’re not the same. Felt is made from natural wool or synthetic fibers and is non-woven. Fleece, on the other hand, is woven and made entirely from plastic.
No, it is better to air dry it as putting it in dryers can misshape it and mess with the interlocking fibers.
Yes, it's fine to iron felt. No need to use steam for it either.
Dusty felt can be cleaned using a clothes brush to remove dust and lint. If it’s on your floor like a rug pad, you can also use a vacuum cleaner on a low setting.
Natural fiber felt does not naturally stick to felt unless glue or adhesive is applied. However, you will see those acrylic felt boards that do stick together — that’s because the fibers interlock with each other like a weaker version of velcro.
No, felt does not unravel — it’s non-woven, so there’s really nothing to unravel.
Yes, felt makes a good insulator because it’s matted and dense with all the fibers pushed together.
Flic Flac felt is a felt fabric that is ideal for art and crafts use. It is packaged in assorted colors and already cut into manageable craft squares.
Wool felt is more supple and softer to touch than acrylic felt. Acrylic felt is stiff and coarse.
It depends on the type. Wool felt is generally a sustainable material because it’s renewable and biodegradable. It doesn't cause unnecessary environmental pollution and it’s economically sustainable.
Recycled fiber felt is also fairly sustainable since it uses recycled materials and can be re-recycled. On the other hand, brand new acrylic fiber felt can push the envelope on the whole sustainable thing since it uses polyesters and plastics. It can still be recycled and doesn’t have to use harsh or toxic chemicals, so it’s certainly not the worst.
If you’ve realized that felt doesn’t suit your fancy when it comes to rug pads, that’s totally fine! We have other rug pad materials too.
The Anchor Grip uses felt and EVA while the Eco Plush rug pads use 100% felt. The RugPro, Contour-Lock, and Superior-Lock pads use a combination of felt and rubber.
The Anchor Grip pad is a felt and EVA rug pad made in the United States. It has great grip and doesn’t stick to your floors, discolor them, or dry them — making it an ideal rug pad material for vinyl and luxury vinyl plank flooring.
Natural rubber is a naturally occurring polymer that comes from the rubber tree.
It’s an ideal material to use in rug pads because it grips floors, ensuring your rugs stay in place, without damaging the floor or your rug. Plus, it’s non-toxic and doesn’t have a strong smell.
We use natural rubber in our non-slip rug pads, such as Nature’s Grip and Super-Lock Natural, for its gripping properties.
In order to be used in a building, insulation products need to pass British Standard tests regarding fire protection. The two main standards under which such products will be assessed are BS 476-1: Fire tests on building materials and structures and BS EN -1: Fire classification of construction products and building elements. The results of these tests are used by specifiers and contractors to determine the best fire rated insulation available for their needs.
The classification system defined in BS EN -1 is typically the primary recognised standard in the construction industry. The process for classification under this standard involves a combination of up to five rigorous tests designed to assess the product on a range of characteristics, including combustibility, heat levels, flame spread and smoke release. Once tested, the product receives an official classification of its fire rating, known as a Euroclass rating.
Here at Insulation Superstore, we have a range of fire-rated insulation solutions available to order. But, before you choose your products, it’s important to understand the classification process and what each level means in terms of fire resistance and protection.
We’ve covered all that you need to know in our guide in terms of classifications and the types of insulation available so that you can make an informed purchase with safety in mind.
The BS EN -1 classification comprises three ratings. The first is the main Euroclass rating, which will be the letter A1, A2, B, C, D, E or F. A1 is the highest level of performance, while F is the lowest. Flooring materials are followed by the abbreviation ‘fl’ (for example, A1fl).
Linear pipe thermal insulation products are followed by the abbreviation ‘L’ (for example, A1L). A1 products are classified as non-combustible. A2 products are classified as limited combustibility, and B to F are classified as combustible in ascending order.
ClassificationDefinitionDescription A1Non-combustibleNo contribution to fire A2Limited combustibilityVery limited contribution to fire BThe second classification relates to smoke emissions during combustion. This is indicated by a rating of s1, s2 or s3, from highest to lowest performance. Smoke emission classifications are not provided for products with an E or F overall rating.
The third classification relates to the level of production of flaming droplets/particles during combustion. This is indicated by a rating of d0, d1 or d2, from highest to lowest performance. E-rated products receive a d2 flaming droplet classification.
F-rated products receive none. A1-rated products are not given smoke emission or flaming droplet ratings, on the assumption that they do not contribute to fire growth or spread.
ClassificationLevelDescription Smoke emission during combustionS1Quantity/speed of emission absent or weak S2Quantity/speed of emission of average intensity S3Quantity/speed of emission of high intensity Production of flaming droplets during combustionD0No dripping D1Low dripping D2High dripping Note: The descriptions above are a simplification of the current national and European Standards. It exclusively has an informative value and it has the only purpose to facilitate the understanding on the use of flameproof materials for insulation. Insulation Superstore is in no case responsible for the accuracy of the information and/or for any misinterpretation.Occasionally, a building insulation product may focus on a Class 0 or Class 1 rating. However, these classifications do not indicate the combustibility of the product, referring only to limited surface fire performance characteristics.
Class 0 is a rating defined in Approved Document B of the Building Regulations . It combines two tests in the British Standard BS 476. The first assesses a surface’s contribution to fire propagation (BS 476-6) and the second assesses the spread of flames across a surface, including distance and time (BS 476-7).
Class 1 is a limited classification based on the test in BS 476-7 only. It is important to recognise the limited application of these classifications.
Non-combustible products are the best option when it comes to fire-rated insulation. A product can be described as non-combustible if it receives a Euroclass A1 rating under BS EN -1. A product with a Euroclass A2 rating indicates “limited combustibility”, which will be appended with the smoke emission and flaming droplets ratings for further context.
In addition, a separate test for non-combustibility is defined in BS 476-4:: Non-combustibility test for materials and BS 476-11:: Method for assessing the heat emission from building products.
Examples of non-combustible insulation materials include cement, fibreglass (glass wool), stone wool (rock wool), glass foam and ceramic. There are several ranges of non-combustible insulation products available at Insulation Superstore.
Let’s take a closer look at the main ones.
Knauf provides multiple solutions for roofs, walls and floors, including Euroclass A1-rated glass mineral wool loft roll, insulation slab and cement board, and Euroclass A2-rated gypsum plasterboard.
Other options include Isover glass fibre and mineral wool rolls, Rockwool loft rolls and cavity barriers, SuperFOIL SFNC multifoil insulation, and Magply building panels.
There are several more choices for fire-rated insulation available. Promat fire resistant boards are rated Class 0 under the Building Regulations, providing high-performance fire resistance in a slimline calcium silicate board. Several Gyproc plasterboards also carry the Class 0 certification. Class 1 fire rated insulation is available from Rockwool, Knauf, SuperFOIL and Gyproc.
Fire-rated insulation is crucial for ensuring the safety and compliance of a building, particularly in areas prone to fire hazards. It provides a barrier against the spread of flames, smoke, and toxic gases in the event of a fire, helping to contain the blaze and minimise damage.
By meeting stringent fire safety regulations and standards, fire-rated insulation enhances the overall fire resistance of the structure, protecting occupants and property alike.
Bottom line:
Choosing the right fire-rated insulation class for your next project is absolutely crucial.
Please note: All content contained in this blog post has an exclusively informative value. It has only the purpose of facilitating the understanding of the use of flameproof materials for insulation. Insulation Superstore is in no case responsible for the accuracy of the information and/or for any misinterpretation. Please consult with a qualified insulation professional for advice on your particular project’s needs.
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