A rug pad is not an accessory. It is a structural component that affects how a rug feels, how long it lasts, and whether it damages the floor beneath it. Yet rug pads are consistently the most under-specified element in interior projects. The wrong pad can stain hardwood, cause a rug to bunch and wrinkle, or fail to provide the grip that prevents slipping hazards.
Felt Pads
Felt rug pads are made from compressed recycled fibers — typically a blend of synthetic and natural materials. They provide excellent cushioning, adding a plush, luxurious feel underfoot that enhances the tactile experience of any rug. Felt is the best choice when cushion and comfort are priorities.
However, felt alone provides limited grip. On smooth hard surfaces like polished hardwood or marble, a pure felt pad may allow the rug to slide. Felt pads work best on low-traffic areas, under heavy furniture that anchors the rug, or on surfaces that already have some natural friction, like matte-finished wood or textured tile.
Rubber Pads
Natural rubber pads (not synthetic rubber, which is an important distinction) provide superior grip on hard surfaces. They are thin, typically 1/8 inch, and their primary function is to prevent the rug from moving. For runners in hallways, rugs in high-traffic zones, and any rug on a polished surface, rubber is essential.
The critical specification is natural rubber only. Synthetic rubber and PVC-based pads contain plasticizers that leach into hardwood finishes, leaving permanent discoloration. This is one of the most common and most avoidable flooring mistakes in residential design. Always verify that the pad is 100% natural rubber before placing it on any finished wood surface.
Combination Pads
Combination pads layer felt on top with natural rubber on the bottom. They offer both cushioning and grip in a single product, making them the most versatile option for most residential applications. The felt layer provides comfort and sound absorption while the rubber base prevents movement.
For hand-knotted and loom-knotted rugs like Kapetto's collections, a combination pad of 3/8 inch thickness is the standard recommendation. This provides enough cushion to enhance the rug's natural softness without raising the rug so high that it creates a tripping edge or interferes with door clearance.
Matching Pad to Surface
Hardwood and engineered wood: use natural rubber or combination pads only. Never use adhesive-backed pads. Tile and stone: rubber or combination, depending on whether you want additional cushion. Carpet-over-carpet: use a thin, firm pad (not felt) to prevent the rug from bunching. The rug is already sitting on a cushioned surface, and adding more felt creates instability. Radiant heated floors: use thin rubber pads only, as thick felt pads insulate against the heat and reduce the system's efficiency.
Sizing
A rug pad should be cut one inch smaller than the rug on all sides. This prevents the pad from extending beyond the rug edge, where it would be visible and collect debris. Many designers overlook this detail, and the result is a pad that peeks out from beneath the rug — a small thing that undermines the precision of the entire specification.
When to Replace
Felt pads compress over time and lose their cushioning. Replace every five to seven years, even if the rug itself is in good condition. Rubber pads maintain their grip longer but can become brittle after eight to ten years. Combination pads should be replaced when either layer shows signs of degradation. For investment-quality rugs, the cost of a new pad every few years is trivial compared to the protection it provides.
The Bottom Line
Specify the pad with the same attention you give the rug itself. A premium rug on a cheap pad is like a bespoke suit on a wire hanger. It still looks good, but it is not being treated with the respect it deserves, and it will age accordingly.
