mineral wool vs glass wool

Acoustic foam panel is the solution to improve sound quality by reducing noise, however, mineral wool insulation is the best solution to block sound transmission. Second, the operation place is different. With a density over three times that of fiberglass, mineral wool has superior sound-deadening properties. The table below compares the characteristics of stone wool (a type of mineral wool) and glass wool. In addition, mineral wool generates very little waste when being manufactured. In the early 1930’s, a researcher was trying to create a vacuum seal between glass blocks when a jet of high-pressure air blew a stream of molten glass into whispery-fine fibers. Your email address will not be published. For nearly 80 years, fiberglass insulation has been the most popular type of home insulation, and it’s easy to see why: Fiberglass is affordable, easy to install, readily available in a wide variety of sizes and, most importantly, an excellent insulator. That accidental discovery led to the first large-scale production of fiberglass strands, which were eventually used to create fiberglass insulation. Water Resistance: Mineral wool insulation is hydrophobic, meaning it’s highly resistant to moisture and water. Mineral fiber insulation includes two insulation groups: fiberglass insulation (glass fiber insulation) and stone wool insulation (insulation made from rock and slag). Fiberglass has an R-value of approximately 2.2 to 2.7 per inch of thickness. Is there a mineral wool product which can be used? Cellulose insulation —Has significant recycled content, with manufacturers often claiming 80% or more. Highlights on Acoustic Foam Panel vs Mineral wool insulation. You can carve mineral wool. But which one is better for your situation? Mineral wool can also be produced from basalt. But instead of being composed of fluffy glass fibers, rock wool is made from volcanic rock, primarily basalt. To make mineral wool insulation, basalt and industrial slag are melted in a 3,000° F furnace. However, like many building materials, mineral wool also has its drawbacks. It tends to be more expensive than fiberglass, often between 25-50% higher in cost. Required fields are marked *, Keeping Your Garage Door Opener in Working Order, What’s the Difference: Fiberglass vs. On the other hand, the Fiberglass material has an R-value ranging from 2.2 to 2.7 per inch. Why do we use it? How do the two compare on sound deadening? Mineral wool has cheaper making cost, so the price is cheaper. Because of its density, mineral wool is hard to compress. The following picture shows both with a large magnification. Typically, glass mineral wool can operate up to 400°C (typically 230°C without modification) whereas rock can operate up to 700°C. When insulating your home, be sure to ask the local building inspector to specify the exact type and thickness of insulation required, and to point out any areas that need mineral-wool firestops. Mineral wool insulation is made from molten glass, stone or slag (industrial waste) that is spun into a fibre-like structure. Store: (802) 472-5581 Spray foam insulation—Is strictly a chemical product and therefore contains very little recycled content. Loose-fill options are widely available, allowing you to fill odd wall cavities or add insulation to your attic. Molten liquid glass (which is made from sand, silica and at least 60% recycled glass) is spun and pulled through a fine mesh to make glasswool. I am designing a residential project in California which requires an exterior wall insulation value of R21. In many ways, mineral wool is a superior insulation product. I’m going to push this product in our affordable-housing units—excellent fire barrier, no mold or rot (hydrophobic means fear of water literally, but conventionally it means water repellent), never loses insulative value!!! It has a density of 1.7 pounds per cubic foot, as compared to 0.5 to 1.0 for fiberglass. When properly installed, fiberglass and mineral wool are both excellent insulators and each will keep your home warmer in winter and cooler in summer. Joe is also the author of numerous DIY books, including the best-selling Building a Shed. If fiberglass insulation gets wet, it becomes soggy, and its insulating value drops significantly. Mineral wool actually refers to several different types of insulation: glass wool, fiberglass manufactured from recycled glass; rock wool, made from basalt or slag wool which is produced from the slag from steel mills. Wool Insulation 50mm x 400mm *10m (K value = 0.038 w/mk, or R value = 1.316) Please can someone advise me whether this difference in insulation K and R values are significant. Natural rock is heated until melting point, and spun at high speed into rock fibers. For a long time, asbestos was used as an insulation material. In many ways, mineral wool is a superior insulation product. Slag wool is more commonly used, and accounts for about 80% of the mineral wool industry. Sustainability: Mineral wool is composed of 70 percent or more recycled content. Glass wool is produced in rolls or in slabs, with different thermal and mechanical properties. Mineral wool insulation is typically only available in unfaced batts. Mineral wool has superior fire resistance when compared to glass wool; installing it can actually improve the fire resistance of your property, effectively acting as a fire barrier. with any questions, for more information or to place an order for some of our high-quality building materials. When it gets wet, it can absorb water, causing it to lose R-value. Installation: Mineral wool comes in dense, firm batts that are friction-fit into place; no stapling required. Mineral wool is hydrophobic. The Mineral Wool just the fact alone that is is does not promote mold is a winner in my book. FEATURES FIBER GLASS … The price is fairly similar for the amount I need. The principle of both thermal insulations is to hold a (still) gas and to block radiation. Fiberglass also comes as loose-fill insulation, which can be spread by hand or blown into place by a mechanical blower. This is a very interesting article. Rockwool is a very sustainable material since it contains up to 75 percent recycled content. Third, the cost performance is different. Fiberglass insulation is composed of fine glass fibers that are woven, lightly compressed and then cut into long rolls or batts. Slag wool and rock wool (the two types of mineral wool insulation)—contain 10-15% and 70-90% recycled content respectively. Hello Kevin, If you’re looking for a moisture-resistant form of insulation, mineral wool is the clear winner. Also referred as mineral wool, is made from, of course, rocks! From the dictionary: “Tending to repel or fail to mix with water.” If fiberglass insulation becomes wet, you end up with a wet lump of glass lint, with no insulation value to boot. Very helpful and informative. Johns Manville Mineral Wool batts are made of inorganic fibers derived from basalt, a volcanic rock and are enhanced with glass fibers. Mineral wool, on the other hand, will not become wet. In the left one, the solid fibers have only point… I love geeking-out over new products and how they compare to their conventional counterparts. When glass fibers are spun to make fiberglass batts, the fibers are long, and therefore hang together easily to make a cohesive batt. This explains the name as well. It tends to be more expensive than fiberglass, often between, By having a basic understanding of the differences between mineral wool and fiberglass insulation, you can quickly. Fiberglass insulation typically contains 20 to 30 percent recycled … Mineral wool was a replacement for asbestos after that substance became banned. Andersen Windows Glass Options for Your Home or Business, determine which option is the best solution for your specific situation. Mineral wool insulation for the same wall runs about $1 to $1.10 per square foot. With a density over three times that of fiberglass, mineral wool has superior sound-deadening properties. Lastly, mineral wool costs less then fiberglass, as it only costs around $1 per square feet. Weight: Fiberglass is lightweight and easy to carry, but the batts are rather limp and can be challenging to set into place. What is mineral wool? Mineral wool insulation has superior sound-deadening properties. It, too, was invented by chance when it was discovered that strong winds routinely blew molten lava into fine threads that resembled wool during volcanic eruptions. Fiberglass can be compressed, causing it to lose R-value. The strands are compressed into thick, dense mats and then cut into batts of insulation. Mineral wool originated in Germany in 1871 and was one of the first insulation materials to be commercially produced. However, rock mineral wool is able to tolerate higher temperatures without any loss to its insulation properties than glass mineral wool. I also did not know it was made of lava rocks. It has a higher R-value per inch compared to fiberglass, about a 22-37% higher R-value. Glass is used to produce wool (glass wool) and foam (cellular glass). Mineral Wool Insulation. R21 / 5.5″ indicates a material with R3.8 per inch is required. Toll Free: (800) 287-5581, Copyright © 2021 Poulin Lumber-US LBM, LLC     Terms | Privacy | Don’t Sell My Info, Andersen Windows creates some of the best windows in the industry, but which glass options should ... [read more], The Pros and Cons of Rockwell (Mineral Wool) vs. Fiberglass Insulation, However, like many building materials, mineral wool also has its drawbacks. Unlike fiberglass batts, mineral wool batts hold their shape. In terms of environmental friendliness, however, glass wool performs better. Fiberglass insulation is noncombustible, but not nearly as fire resistant as mineral wool. Mineral wool is tough, durable and flexible. Joe Truini is a home improvement expert who writes about a variety of topics related to carpentry and plumbing. Now that you have a basic understanding of fiberglass and mineral wool, let’s take a look at the differences between these two popular types of insulation. Both types are popular and readily available. Its dense nature requires the use of a serrated bread knife or wood saw to cut batts down to size, and it’s very difficult to find in a loose-fill format. Toll Free: (800) 479-4971, Hardwick Use a serrated bread knife or woodcutting handsaw to cut mineral wool insulation. A wool's type is determined by the fibers or filament used during manufacturing. Though it’s a non-combustible material, it doesn’t provide the level of fire block that mineral wool does. It is then compressed into mats of rock wool. Mineral wool is also known as mineral fiber, mineral cotton, mineral fibre, man-made mineral fibre (MMMF), and man-made vitreous fiber (MMVF).. Because it is more unusual, it’s not available in as wide a range of sizes as fiberglass and is almost never available in a paper-faced format. Professional Service, Products and Integrity since 1936, Home  >  Blog  >  Interior  >  Insulation  >  The Pros and Cons of Rockwell (Mineral Wool) vs. Fiberglass Insulation, Sep 25, 2019 | Energy Efficiency, Insulation, Winterizing. Loose-fill mineral wool does exist, but it’s difficult to find. Water Resistance. Thanks for taking the time to make and publish the article. Uses of fiberglass insulation. Versatility of applicationFiber glass insulation offers a solution for every need throughout the building. Interestingly fiberglass insulation was invented quite accidentally. Fiberglass is made of silica (sand) that has been melted and spun into glass wool. Fiberglass insulation is used in walls, floors, and ceilings to control the movement of heat, cold, and sound. It is a common misconception that glass or rock mineral wool fibres are damaged by water. The process traps many small pockets of air between the glass, and these small air pockets result in high thermal insulation properties. It contains 70% recycled material, making it a greener product than fiberglass at 20-30% recycled material. Typically, glass mineral wool can operate up to 400°C (typically 230°C without modification) whereas rock can operate up to 700°C. Size: Fiberglass insulation is available in a wider range of sizes and types than mineral wool. Prices can vary at any time, but expect to pay around $0.10 more per inch for mineral wool versus fiberglass. R-Value: The thermal resistance of insulation is measured by what’s commonly known as the R-value, and the higher the R-value, the better. Thank you! Its popularity means that it’s available in a wide range of sizes and with or without a paper facing. That way you have the economical benefit of fiberglass and the added benefit of mineral wool. In conclusion, Rockwool is 1.5 times more effective fire-resistant than Fiberglass. In addition, sheep wool … Specific mineral wool products are stone wool and slag wool.Europe [who?] Mineral wool insulation or rockwool typically costs more per inch than fiberglass insulation. Cellulose insulation can be used only for attics and walls. The materials available for these batts include mineral wool and fiberglass as the most common varieties. Fiberglass will not burn, but it may melt if temperatures go above 212°F. It’s recommended that you wear a dust mask when cutting and handling any type of insulation, including fiberglass and mineral wool. It doesn’t have as high an R-value as mineral wool, which can be a problem in extreme climates with minimal wall depth. (Slag is a by-product of steel production that usually ends up in landfills.) The wool is reinforced with tiny fibers of glass. Today, fiberglass remains the undisputed king of insulation, but its crown is being threatened by a relatively new insulating material: mineral wool. Your email address will not be published. As the name suggestions, recycled glass is a key ingredient in the manufacturing of glass wool insulation. Fiberglass also has its downsides. Rock wool insulation price The main reason why people often prefer fibreglass insulation instead of rock wool, has to do with the purchase price. The blankets cut cleanly with a knife, making clean up time hassle free. Just trying to figure out if I should just go with mineral wool inside the house between the bathroom and our bedroom or go with fiberglass acoustical. It is held together by a binding agent and layered until it looks like wool – hence the name. Because it has a lower overall density, it doesn’t deaden excessive sound as well as mineral wool. Fiberglass: Fiberglass is composed of fine glass fibers, held together with resin and binder. How it’s made: Natural rock is heated up to 3000 degrees until it melts. also includes glass wool which, together with ceramic fiber, are completely man-made fibers.. History. Among these are batts or blankets, which are placed between studs or posts in a structure, then covered over with some type of hard wall surface, such as drywall or paneling. The sheep wool type is all-natural and more efficient than fiberglass. Fiberglass insulation for a 2×6 wall costs between 57 cents and 72 cents per square foot. Mineral wool is heavier than fiberglass, but the batts are also stiffer, so they don’t bend or flop over as easily. I like your conclusion to use wool on the North side and to help with creating a fire stop. It is available faced with kraft paper or aluminum foil as well as unfaced. I live in High humidity area in Texas. Mineral wool is widely used in industry area, rock wool is widely used in building area. To learn more about choosing the right insulation and see a wide variety of options, please visit the Home Depot website. Fiberglass batts must be secured with staples or wire. It requires 15 percent less energy than fiberglass to produce. hbspt.cta.load(2998704, '3757a91e-85f4-4476-925b-60409d640a0c', {}); Derby Because it’s denser, it’s also heavier, which can make it more ungainly to handle during ceiling installations. The magma-looking liquid goes through a high-pressure air or steam jet. Our advanced manufacturing technology ensures consistent product quality, with high-fiber density and low shot content for excellent performance. When it comes to insulation, there are a few options available to help you keep your home or business more comfortable and energy-efficient during extreme weather. Mineral wool insulation comes in a variety of types and forms for uses throughout the building. Density: Mineral wool insulation has superior sound-deadening properties. For this reason, in high temperature process plants, rockwool is the most commonly found insulation type. That revelation eventually led to the manufacture to rock wool insulation. Contrary to glass wool, rock wool insulation does not cause that much skin irritation. Mineral wool has a slightly higher R-value, ranging between 3.0 and 3.3 per inch. Store: (802) 766-4971 This kind of insulation is also known as fibreglass insulation because of the fact that it is made from glass. Mineral wool batts are so dense that you can carve them to accurately fit around outlets and … Mineral wool insulation is typically only available in unfaced batts. Fiberglass insulation typically contains 20 to 30 percent recycled content. Mineral wool has a slightly higher R-value, ranging between 3.0 and 3.3 per inch. Typically costs more per inch compared to fiberglass, mineral wool can vary at any time, it. 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