Is It Necessary to Install Trunk Soundproofing Cotton?
3 Answers
Installing trunk soundproofing cotton is unnecessary as its effect is minimal. Reasons: While adding soundproofing cotton in the trunk can absorb some noise energy and convert it into heat dissipation to a certain extent, relying solely on soundproofing cotton to block noise has negligible impact. This is because most noise is transmitted into the vehicle through the body frame structure, and installing soundproofing cotton does little to address this. Side Effects of Trunk Soundproofing: Since trunk soundproofing requires removing the trunk liner panels—which are mostly secured by clips—they are highly prone to damage during disassembly. If the technician lacks skill, it can easily lead to issues like abnormal noises during later vehicle use.
I used to find the noise from the trunk particularly annoying, especially the buzzing sound from the tires and chassis at high speeds. After installing soundproofing foam, I noticed a significant reduction in trunk noise, with at least 30% of the tire noise being filtered out. It's not difficult to install it yourself—just buy adhesive-backed soundproofing foam and firmly stick it to the wheel arch area. The key is to choose a material that's at least 5mm thick. After installation, there won't be any resonance or strange noises when placing items inside, and it even provides slight heat insulation in summer. While it can't completely block out engine noise, spending around a hundred bucks for a more comfortable cabin environment seems worth it to me. However, if your car already has built-in soundproofing or you rarely take long trips, there's no need to go through the hassle.
Soundproofing foam is a small upgrade that significantly boosts happiness for me. Once, during a family trip, my child couldn't sleep due to the noise from the trunk. Later, I bought butyl rubber soundproofing foam online and covered the spare tire well and both wheel arches. Now, even the clattering noise on rough roads is much reduced. Remember to choose eco-friendly materials without any odor to avoid harmful gas emissions after sun exposure. Actually, vehicle noise reduction is a systematic project, and just improving the trunk has limited effect. However, focusing on this area alone yields the most noticeable results, especially in reducing cavity resonance, making the audio sound clearer. The most immediate feeling after installation is that long drives are less tiring on the ears—a classic example of achieving big results with small investments.
