What is the layer beneath the car floor mat called?
3 Answers
The layer beneath the car floor mat is called the floor insulation. Here are the functions of car floor mats: 1. Maintain interior cleanliness: The function of car floor mats is similar to that of household floor mats, keeping the car floor clean. 2. Comfort: The comfort of car floor mats is reflected in two aspects: one is their certain heat insulation function, and the other is their ability to absorb vibrations. Whether for front or rear engine cars, floor mats can somewhat reduce the heat generated by the engine. They also significantly dampen vibrations from the vehicle's movement on the road. 3. Sound insulation: Car floor mats have a certain soundproofing effect. Noise from the car floor is transmitted into the cabin through the mats, which absorb and weaken these noises, achieving a soundproofing effect.
When I researched car accessories before, I specifically learned about this. The layer beneath the floor mats is actually the factory-installed base carpet, technically called the body carpet or floor felt. This layer is directly adhered to the metal floor panel, primarily serving to dampen noise and provide insulation. It's typically made of polyester fiber composite laminate material, about 5-8mm thick, and is notoriously difficult to clean once dirty. That's why it's necessary to use top-layer floor mats for protection. I recommend purchasing full-coverage floor mats that wrap around the sides too. Here's a fun fact: some luxury cars have soundproofing cotton embedded in their factory carpets, and you'll see a silver soundproofing layer when lifted. Remember not to tear this base carpet yourself, as it might damage the waterproof sealant on the floor panel.
Veteran drivers must have encountered this issue—the layer beneath the floor mats is the factory-installed carpet. It may look ordinary, but it actually has a three-layer structure: the top layer is cut-pile fabric, the middle is a foam damping layer, and the bottom has a moisture-proof coating. Last time at a car wash, I saw a BMW owner lift it up, and the worker mentioned this material is highly susceptible to liquid penetration—spilling soda can leave permanent stains in minutes. That’s why I insist on using rubber floor mats, especially opting for ones with anti-slip studs for the driver’s side. Also, a heads-up: removing and reinstalling this factory carpet is a hassle, requiring seat bolts to be unscrewed—don’t touch it unless you’re upgrading the audio system.
