What Is a Silk on Silk Rug?

A silk on silk rug has a silk pile knotted onto a foundation of silk warp and silk weft, so every thread in it is silk, not only the surface you walk on. It is the finest, lightest and most costly way to make a silk rug, and also the most delicate on a floor.

What does silk on silk actually mean?

Silk on silk means that both parts of a knotted rug are silk: the pile, which is the yarn tied in knots and cut to form the surface, and the foundation, which is the grid of warp and weft threads the knots are tied around. The phrase describes the whole build, not just the look.

Every hand knotted rug has the same two parts. The warp threads run the length of the rug and are stretched on the loom; the weft threads are passed across between rows of knots to lock them in. Our guide to warp and weft shows where each sits in a finished rug.

Three combinations cover most knotted rugs that carry silk. Silk on silk has silk pile and silk foundation. Silk on cotton has silk pile and a cotton foundation. Wool and silk has a wool pile with silk worked into parts of the design, usually on cotton. Each one is a different rug, at a different price, for a different room.

The term only applies to knotted rugs. A handloom or hand tufted rug has a different structure, with a backing or woven ground rather than a knotted foundation, so silk on silk does not describe it.

How does a silk foundation change a rug?

A silk foundation makes a rug finer, thinner and more supple, because silk warps can be spun much finer than cotton ones while staying strong. Finer warps sit closer together, which lets the weaver tie more knots in every square inch and draw sharper detail.

That fineness shows in three ways. The design can be very detailed, with curves and small motifs that a coarser grid would turn into steps. The rug is light and drapes almost like heavy cloth, so it can be folded rather than rolled. And the back carries a lustre of its own, because the weft and the knot loops seen from behind are silk too.

The same qualities bring limits. A silk foundation stretches and moves more than cotton, so a silk on silk rug can lie less flat, ripple at the edges or creep on a smooth floor. It also has less body, which makes it more of a textile to admire than a floor covering to live on.

Silk on silk is a textile first and a floor rug second. Plan the room around that.

A silk on cotton rug trades some of that fineness for a steadier rug. Cotton warps hold their tension well, so the rug lies flat and square, carries furniture better and still shows the full sheen of the silk pile on its face.

Silk on silk, silk on cotton or wool and silk: how do they compare?

Silk on silk is the finest and most fragile of the three, silk on cotton keeps the silk face on a steadier base, and wool and silk is the most practical for daily life. The table sets them side by side on the points that change how a rug lives in a home.

Point	Silk on silk	Silk on cotton	Wool and silk
Pile	Silk	Silk	Wool, with silk in the design
Foundation	Silk warp and weft	Cotton warp and weft	Usually cotton
Fineness possible	Highest	High	Moderate
Handle and drape	Thin, supple, folds like cloth	Firm, lies flat	Fuller, springy underfoot
Back	Lustrous, silk loops visible	Matt grid with silk knots	Matt, wool knots
Fringe	Glossy silk	Matt cotton	Matt cotton
Relative price	Highest	High	Moderate
Best place	Wall, low use floor	Bedroom, study, formal room	Living and family rooms

Verdict: for a rug you will walk on every day, choose silk on cotton or wool and silk over silk on silk, because the cotton foundation keeps the rug flat and steady; choose silk on silk only for a piece that will be hung or kept in a quiet room.

How can you tell whether a rug is silk on silk?

You can tell a silk on silk rug from its fringe, its back and its weight, and you should confirm it with the seller's written description. No single test is proof, but together they are a good guide.

• Look at the fringe. In a knotted rug the fringe is the warp itself, left long at each end. A silk warp gives a smooth, glossy fringe that catches the light. A cotton warp gives a matt, slightly fuzzy white or cream fringe. Some rugs have a fringe sewn on afterwards, so check that the fringe threads run into the body of the rug.
• Turn over a corner. On the back of silk on silk, the rows of weft and the knot loops shine much as the front does. On silk on cotton, the grid looks matt and the silk shows only as knots.
• Count the knots. Silk on silk is usually very finely knotted. Count knots along one inch on the back in both directions and multiply, as explained under KPSI. A coarse count with a silk claim is worth a question.
• Feel the weight and drape. Lift a corner. Silk on silk falls softly and feels thin for its size; a cotton foundation feels firmer.
• Ask for it in writing. The invoice should name the pile fibre and the foundation fibre separately. A fibre test by a specialist can settle any doubt without harming the rug.

Where does a silk on silk rug belong in a home?

A silk on silk rug belongs where it will be looked at more than walked on: on a wall, in a prayer room, at the foot of a bed in a principal bedroom or in a formal room that is used a few times a month. It does not belong in a passage, under a dining table or in a family room.

Its thin foundation means it moves on marble and vitrified tile, so on a floor it needs a thin underlay cut a little smaller than the rug. Furniture is best kept off it, because a sofa or chair leg presses a fine silk pile flat and the light foundation does not help it spring back.

Indian conditions add two cautions. Strong afternoon sun through a west window fades silk dyes, so a sheer curtain is worth having. And in a humid monsoon, any silk rug should stay off a floor that sweats, with a quick check under the corners on damp days.

Hanging is often the best use of all. A silk on silk rug on a wall shows both its detail and its sheen, and the back, which is half its beauty, can be seen when it is taken down.

What does Rugberry make instead of silk on silk?

Rugberry makes one rug in real silk, the hand knotted Couture Silk Rug, plus Botanical Silk and wool and Botanical Silk rugs for the rooms where a silk look is wanted at a lower price. None is described as silk on silk, because the product pages do not state a silk foundation.

The Couture Silk Rug is hand knotted in real silk, dense and fine, with an abstract field of grey, brown and soft blue. It is from about ₹60,480 for 5x8 ft, inclusive of GST at the time of writing, and can be made in any size and colour to order. If the foundation matters to you, ask Rugberry before ordering and have the answer written on the quotation. Our article on hand knotted silk rugs looks at Couture closely.

The Nuva Silk Rug in Chocolate and in Beige is handloom woven in Botanical Silk, a plant-based fibre, at 10 mm, with a sheen that changes as the light moves. It is from about ₹33,600 for 5x8 ft. It is not knotted and has no knotted foundation, so the terms in this guide do not apply to it.

The Insignia Wool & Silk Rug pairs New Zealand wool with Botanical Silk on the handloom, from about ₹33,600 for 5x8 ft. It suits a living room that wants a touch of sheen without the care a fine knotted rug asks for. Our comparison of silk and Botanical Silk explains how the two fibres differ.

Is a silk on silk rug worth seeking out?

A silk on silk rug is worth seeking out if you want a collector's textile and have a wall or a quiet room for it. If you want a floor rug that looks like silk and lives well, silk on cotton, a wool and silk blend or a Botanical Silk rug in a calm room will serve you better for the money.

Price follows the build. A silk foundation costs more than cotton, and the fine knotting it allows costs more again in hours, so silk on silk sits at the top of any silk price list. Our guide to the silk rug price in India sets out what each kind costs per square foot.

Before you buy, ask three things: what the pile is, what the warp and weft are, and how many knots there are per square inch. A seller who answers all three plainly is selling a rug you can trust.

Frequently asked questions

Is silk on silk better than silk on cotton?

It is finer, not better for every use. A silk foundation allows more detail and a lustrous back, while a cotton foundation keeps the rug flatter and steadier underfoot, which suits a rug that is walked on.

How do I know if the fringe of my rug is silk?

A silk fringe is smooth, glossy and cool between the fingers, while a cotton fringe is matt and slightly fuzzy. Check that the fringe threads run into the rug, since a fringe sewn on later says nothing about the foundation.

Can a silk on silk rug go on a marble floor?

It can, with a thin underlay cut just inside its edges, because the light silk foundation tends to creep on polished stone. Keep it in a room with little traffic and no furniture standing on it.

Does Rugberry sell a silk on silk rug?

No rug or carpet in the current Rugberry range is listed as silk on silk. The Couture Silk Rug is hand knotted in real silk, and buyers who need a silk foundation can ask about it when ordering a custom piece.

Is Botanical Silk ever made silk on silk?

No. Botanical Silk is a plant-based fibre, not silk from the silkworm, and Rugberry uses it on the handloom or by hand tufting, so the knotted silk on silk build does not apply to it.

Know the pile, know the foundation, then choose the room. See the silk rugs and the hand knotted rugs. Material first.