When it comes to insulation options, the debate between spray foam and Rockwool can be complex.

Energy Efficiency: 1. Spray foam excels in temperature regulation
2. Rockwool retains heat in cold climates
3. Rockwool doesn’t shrink or deteriorate over time
4. Both options offer reliable insulation for homes.

Energy Efficiency Mineral wool is less efficient in temperature regulation compared to spray foam. Yet, it can retain heat within a space, making it perfect for colder climates. Plus, it doesn’t shrink or deteriorate over time, providing consistent insulation for your home.

Does Rockwool sag over time?

Yes, Rockwool can sag over time. When using Rockwool, it is important to protect your skin by wearing protective gloves, a long sleeve shirt, and long pants for safety and to prevent any potential skin irritation. Additionally, to maintain its integrity and prevent sagging, ensure proper installation techniques are followed, such as securely fastening the material in place. Regular inspections can also help monitor any signs of sagging over time.

Does ROCKWOOL dry out if it gets wet?

Rockwool insulation does not dry out if it gets wet, unlike fiberglass Batt insulation which can become damaged, promote mold growth, and lose its insulating properties when exposed to water. Rockwool is more durable than fiberglass and offers water and fire resistance, making it a reliable choice for insulation needs. It maintains its effectiveness even after being wet, providing long-lasting insulation performance.

Does Rockwool dry out if it gets wet?

Yes, Rockwool does dry out if it gets wet. FIRE RESISTANCE: Unfaced mineral wool is noncombustible and has a high melting point, making it more fire-resistant than unfaced fiberglass.

1. Insulation: Rockwool maintains its insulating properties even after getting wet.
2. Mold resistance: Rockwool’s moisture-resistant properties help prevent mold growth.
3. Sound absorption: Despite being wet, Rockwool continues to provide effective sound absorption.

What is a cheap alternative to Rockwool?


A cost-effective substitute for Rockwool is fiberglass. Mineral wool tends to be pricier, typically ranging from 20% to 50% more expensive than fiberglass. This price difference is primarily because of the extensive manufacturing process involved in producing mineral wool. Fiberglass is widely used as an affordable alternative for insulation and soundproofing applications.

Is Rockwool cheaper than fiberglass?

Q: Is Rockwool cheaper than fiberglass?
A: In conclusion, Rockwool is typically more cost-effective compared to fiberglass.

1. Rockwool insulation offers better energy efficiency, resulting in long-term cost savings.
2. Rockwool is durable, requiring less frequent replacement compared to fiberglass.
3. The initial investment in Rockwool may be higher, but its longevity and efficiency make it a cost-effective choice in the long run.

These findings suggest that low-cost Rockwool insulation is a viable alternative to fiberglass, offering both economic and performance benefits.

Is rockwool cheaper than fiberglass?

Rockwool is generally 20% to 50% more expensive than fiberglass, primarily because of the extensive manufacturing process involved in producing mineral wool. Further insights on insulation materials cost comparison:

1. Fiberglass is usually more cost-effective for initial installation.
2. Rockwool may offer better energy efficiency in the long run, potentially reducing overall costs.
3. Consider lifespan and insulation performance when evaluating the cost-effectiveness of these materials.

What happens to ROCKWOOL when it gets wet?

When ROCKWOOL gets wet, it remains durable unlike fiberglass Batt insulation which can become damaged, promote mold growth, and lose its insulating properties. Fiberglass is not water-resistant like Rockwool. Choosing ROCKWOOL can help maintain insulation effectiveness even when exposed to moisture.

Is rockwool safer than asbestos?

Rockwool is safer than asbestos. Fiberglass, basotec, polyfill, and sheeps wool are also safe insulation alternatives. Foam works but can be expensive compared to its performance. Choose based on cost-effectiveness and desired insulation characteristics.

Is Rockwool safer than asbestos?

Rockwool is considered less dangerous than asbestos. Previously deemed almost as toxic as asbestos, mineral wool was modified by the industry, leading to its removal from the “possibly carcinogenic” list by the IARC in 2002. Rockwool is generally viewed as a safer alternative to asbestos due to these improvements.

What is the lifespan of ROCKWOOL?

The lifespan of ROCKWOOL is extended due to its moisture-resistant and vapour-permeable qualities. This insulation is designed to repel water, allowing drainage instead of absorption and enabling the passage of gaseous water vapour.

1. ROCKWOOL insulation’s longevity is further enhanced by its resistance to mold and mildew.
2. Its non-combustible nature contributes to its durability and ability to withstand high temperatures.
3. ROCKWOOL insulation retains its effectiveness and structural integrity over time, maintaining consistent thermal performance.

Is Rockwool better than fiberglass?


Is Rockwool better than fiberglass? Mineral wool insulation surpasses fiberglass with a higher R-value per inch, approximately 22-37% higher. Moreover, Rockwool consists of 70% recycled material, making it more environmentally friendly compared to fiberglass, which typically contains 20-30% recycled content.

1. Rockwool has a higher R-value per inch.
2. Rockwool contains 70% recycled material.
3. Fiberglass usually has 20-30% recycled content.

Does Rockwool degrade over time?

Rockwool does not degrade over time. It is now considered less dangerous than asbestos. In the past, mineral wool was deemed almost as toxic as asbestos and thus not recommended for use. However, the industry modified mineral wool’s composition, leading to its removal from the “possibly carcinogenic” list by the IARC in 2002.

Can you touch Rockwool without gloves?

Yes, touching Rockwool without gloves is safe. Regarding pest control, it’s commonly recommended to use steel wool and foam to seal holes, preventing mice from entering. This practice helps enhance the effectiveness of pest prevention methods when dealing with issues like rodent infestations.

Why is Rockwool so expensive now?

Rockwool is currently expensive due to increased demand and higher production costs. Regarding its longevity, Rockwool insulation can last the entire lifetime of a building when installed correctly in a designed system as per specifications. Since Rockwool products are inorganic, they do not decay, ensuring they maintain their properties unless physically damaged.

Can I handle Rockwool with bare hands?

Yes, you can handle Rockwool with bare hands.

1. Rockwool may cause skin irritation in some individuals due to its abrasive texture.
2. It is recommended to wear gloves while handling Rockwool to avoid irritation.
3. Proper ventilation is important when working with Rockwool to prevent inhaling fibers.

What is the R-value of perlite insulation?

The R-value of perlite insulation is approximately 3.0–3.5 per inch at a mean temperature of 40 degrees Fahrenheit (4 degrees Celsius) for perlite products with densities ranging from 4.1 to 7.4 lb/ft³ (66 –118 kg/m³). Expanded perlite exhibits low thermal conductivity at 0.044 W/mK (0.023 BTU/hr·ft·°F) under typical conditions.

1. Perlite insulation has a low thermal conductivity of 0.044 W/mK.
2. The R-value ranges from 3.0 to 3.5 per inch.
3. Mean temperature for R-value calculation is 40°F (4°C).
4. Density of perlite products varies from 4.1 to 7.4 lb/ft³ (66 –118 kg/m³).

In conclusion, both spray foam and Rockwool have their own set of advantages and limitations when it comes to insulation. Spray foam offers superior air sealing and moisture resistance, while Rockwool is known for its fire resistance and sound absorption qualities. The choice between the two ultimately depends on your specific needs, budget, and project requirements. Consider factors such as R-value, installation ease, environmental impact, and long-term performance when making a decision. Consulting with a professional insulation contractor can help you determine the best option for maximizing energy efficiency and comfort in your home or building.