| 17. What are the advantages of rubber underlayment versus the advantages for cork underlayment?
A. Superior Moisture Resistance
Rubber is inherently waterproof and resists mold, mildew, and water damage far better than cork, which can swell or degrade when exposed to moisture. Ideal for bathrooms, kitchens, and basements.
B. Better Sound Insulation (Higher IIC Ratings)
Dense rubber underlayment typically achieves IIC ratings of 70+, outperforming cork (often 50–65 IIC). It excels at blocking impact noise like footsteps in multi-story buildings.
C. Greater Durability and Compression Resistance
Rubber maintains its shape and cushioning under heavy loads (e.g., furniture, gym equipment) without compressing permanently, while cork can dent or crumble over time.
D.Enhanced Thermal Insulation in Cold Climates
While cork is a good insulator, recycled rubber provides comparable or better R-values in dense formats and doesn’t absorb cold like cork can in humid environments.
E. Pest and Allergy Resistance
Rubber is non-organic and resists insects, rodents, and dust mites. Cork, being natural, can harbor pests or allergens if not properly sealed.
F. Easier Installation with Adhesive or Floating Systems
Rubber rolls or tiles often come with peel-and-stick backing or are designed for loose-lay, while cork usually requires glue and more surface prep.
G. Recycled and Eco-Friendly Options
Many rubber underlayments are made from 100% recycled tires, diverting waste from landfills—often with higher post-consumer content than cork, which is harvested from trees (though renewable, harvesting impacts ecosystems).
H. Better Performance Under Heavy Traffic
In commercial settings (gyms, offices, retail), rubber withstands constant foot traffic and rolling loads without breaking down, whereas cork wears faster.
I. Lower Long-Term Maintenance
Rubber doesn’t require sealing or re-treatment like cork, which may need periodic waxing or polyurethane coating to prevent drying and cracking.
J. Wider Temperature Tolerance
Rubber performs consistently in extreme heat or cold (e.g., radiant floor heating up to 140°F), while cork can become brittle in low humidity or warp under high heat.
Note: Cork shines in eco-conscious builds prioritizing natural materials and breathability, but rubber dominates in moisture-prone, high-traffic, or noise-critical environments.
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