Errors will be corrected where discovered, and Lowe's reserves the right to revoke any stated offer and to correct any errors, inaccuracies or omissions including after an order has been submitted. Roxul 8-Pack 47-in L x 23-in W x 3-in D Stone Wool Insulation BattsFire & Soundproof Insulation. ROCKWOOL Safe'n'Sound® is a stone wool batt insulation designed for interior wall partitions, floors, and ceilings for wood and steel frame construction where superior fire resistance and acoustical performance is required. Available in 3" and 6" thicknesses, Safe'n'Sound® is designed for both wall and ...... Wool Batt Insulation in the Batt Insulation department at Lowe's.com. ROCKWOOL safe'n'sound is a stone wool insulation product that can reduce noise and ...Stone Wool Thermal Batt Insulation, R-38, Exterior Wood and Steel Stud, 47 in L,... Brand Name: ROCKWOOL; PN: 300113; MPN: 294340; UPC: 774783493837 ...A couple things need to be altered slightly from the typical blown-in cellulose installation. Mineral wool should be installed from a hole about three-quarters of the way up in the cavity. The weight of the mineral wool is slightly heavier than cellulose, and having the higher install point puts gravity in your favor.Pickup Free Delivery Fast Delivery. Sort & Filter (2) ROCKWOOL. SAFE 'n' SOUND Attic Wall 59.7-sq ft Unfaced Stone Wool Batt Insulation. ROCKWOOL. COMFORTBATT R-15 Attic Wall 59.7-sq ft Unfaced Stone Wool Batt Insulation. ROCKWOOL. COMFORTBATT R-23 Attic Wall 39.8-sq ft Unfaced Stone Wool Batt Insulation. ROCKWOOL.COMFORTBATT R-15 Attic Wall 59.7-sq ft Unfaced Stone Wool Batt Insulation. Johns Manville. R-13 Wall 163.39-sq ft Kraft Faced Fiberglass Batt Insulation. Shop the Collection. Multiple Options Available. Owens Corning. R-13 Wall 106.56-sq ft Kraft Faced Fiberglass Batt Insulation. Shop the Collection. 1843.Distribution International supplies Mineral Wool Batt Insulation like our R-15 23" X 47" (60.06) ROXUL COMFORTBATT Insulation. Shop online today! About Us ... Rockwool Comfortbatt® Building and Residential Mineral Wool, Insulation Thickness: 3-1/2 in, Material: Mineral Wool, Length: 47 in, Width: 23 in, Density: >2 pcf, R-Value: 15, Flame ...2288. Multiple Options Available. Owens Corning. R-19 Kraft Faced Fiberglass Roll Insulation 48.96-sq ft (15-in W x 39.2-ft L) Individual Pack. Shop the Collection. 2020. Multiple Options Available. Owens Corning. R-13 Wall 106.56-sq ft Kraft Faced Fiberglass Batt Insulation.Shop Johns Manville Wall 80-sq ft Unfaced Mineral Wool Batt Insulation in the Batt Insulation department at Lowe's.com. Johns Manville SAFB® reduces unwanted noise from traveling through a home, and helps delay the spread of fire between interior floors and rooms.11 Results. Low Sloped Roof, Attic Insulation, Sloped Roof, Unconditioned Attic, Exposed wood framed floor, Floor Insulation, Cathedral ceiling, Ceiling Insulation, Interior wall Insulation, Wood Stud, Exterior Walls Insulation, Steel Stud, Basement Wall, Wood Frame Construction Insulation.Stone Wool Insulation (8-Pack) Model # RXCB3523 Item # 100832 UPC 00774783423621. Tap to view. Product overview Rockwool Comfortbatt insulation for wood studs and joists. It is a stone wool insulation product for use in both new residential construction and renovations. This semi-rigid batt has a unique flexible edge designed to compress as the ...Mineral Wool Insulation. Internet # 313477898. Model # RXCB3023. Rockwool. ComfortBatt R30 7-1/4"x23"x47" Unfaced Batt - Stone Wool Insulation 30.7 Sq Ft per Bag RXCB3023Owens Corning Thermafiber Fire and Sound Guard Plus R-15 Wall 39.2-sq ft Unfaced Mineral Wool Batt Insulation. Thermafiber Fire and Sound Guard Plus mineral wool insulation is designed to provide excellent thermal performance, noise control and fire resistance in residential and light commercial construction applications.In addition, ROCKWOOL stone wool insulation products are designed with stringent density and dimensional tolerances to ensure a consistent installation and long-term performance. The quality control measures we incorporate within our manufacturing process are designed to ensure the products you purchase consistently meet requirements of the ...Rockboard ® is a premium multi-purpose board insulation to be used in walls, ceilings and floors for acoustic and thermal applications. These include insulating mechanical or utility rooms, or adding a barrier to noise and fire. Available in multiple variations to meet project requirements, use either Rockboard 40 or Rockboard 60.Product overview. Rockwool Safe'n'Sound insulation for wood studs and joists. It is a stone wool insulation product for use in interior wall partitions of residential wood and steel stud construction where superior fire resistance and acoustical performance are required. This non-combustible, lightweight product has excellent acoustical ...Mineral wool insulation costs $1.40-$2.10 per square foot. Material and labor make up the majority of the cost. Batt and roll insulation is a simple DIY. Blown-in insulation requires a pro. Insulation has an ROI of 100% or more.Big Gap Filler 12-oz Straw Indoor/Outdoor Spray Foam Insulation. 610. Multiple Options Available. Johns Manville. R-13 Wall Kraft Faced Fiberglass Roll Insulation 40-sq ft (15-in W x 32-ft L) Individual Pack. Shop the Collection. 1057. Insulfoam. R-1.9, 0.5-in x 4-ft x 8-ft Faced Polystyrene Garage Door Board Insulation.Find R-19 batt insulation and R-21 insulation, which are ideal for insulating homes framed by 2-inch-by-6-inch lumber. To determine the right amount of insulation for your project, check out our R-Value Insulation Calculator . Find 16 Inch Wide batt insulation at Lowe's today. Shop batt insulation and a variety of building supplies products ...R-21 Attic Wall Unfaced Reflective Roll Insulation 50-sq ft (24-in W x 25-ft L) Individual Pack. Reflectix. R-21 Attic Wall Unfaced Reflective Roll Insulation 200-sq ft (24-in W x 100-ft L) Individual Pack. Reflectix. Reflective Insulation R-7.5 Attic Unfaced Reflective Roll Insulation 200-sq ft (24-in W x 100-ft L) Multi-pack.Pickup Free Delivery Fast Delivery. Sort & Filter (2) List. ROCKWOOL. Comfortboard 80 R-6 Wall 48-sq ft Unfaced Stone Wool Batt Insulation. Find My Store. 85. Find 24 Inch Wide ROCKWOOL batt insulation at Lowe's today. Shop batt insulation and a variety of building supplies products online at Lowes.com.Shop Owens Corning R-49 Attic 48-sq ft Faced Fiberglass Batt Insulation in the Batt Insulation department at Lowe's.com. Owens Corning PINK Insulation is soft to the touch and easy to install. Kraft-faced insulation has a vapor retarder that helps to control moisture transmissionShop Kingspan Insulation R-4, 4-ft x 8-ft Unfaced Polystyrene Board Insulation in the Board Insulation department at Lowe's.com. For use as general purpose insulation for wall applications. XPS insulation can be used as continuous insulation on interior or exterior walls to help increaseCOMFORTBATT R-15 Attic Wall 59.7-sq ft Unfaced Stone Wool Batt Insulation. ROCKWOOL. COMFORTBATT R-23 Attic Wall 39.8-sq ft Unfaced Stone Wool Batt Insulation. ROCKWOOL. COMFORTBATT R-30 Attic Wall 30.7-sq ft Unfaced Stone Wool Batt Insulation. ROCKWOOL. Comfortboard 80 R-6 Wall 48-sq ft Unfaced Stone Wool Batt Insulation.158. Compare. ROCKWOOL. COMFORTBATT R-30 Attic Wall 30.7-sq ft Unfaced Stone Wool Batt Insulation. Find My Store. 531. Compare. Johns Manville. R-30 Attic 58.66-sq ft Kraft Faced Fiberglass Batt Insulation.The Tenmat FF130E Recessed Light Cover is made out of a fire safe material and was specifically designed to protect your light fixture from insulation in the attic and to stop unwanted air leakage through your recessed light. The FF130E has been fire and thermally tested in accordance with UL1598 and IEC 60598-1 and can be used with IC, as well ...Shop Owens Corning Thermafiber Fire and Sound Guard Plus R-15 Wall 39.2-sq ft Unfaced Mineral Wool Batt Insulation in the Batt Insulation department at Lowe's.com. Thermafiber Fire and Sound Guard Plus mineral wool insulation is designed to provide excellent thermal performance, noise control and fire resistance inRoll Insulation Calculator. Input length and width of area to be insulated. Click the button to calculate the amount of insulation (in square feet) and man-hours (wall and ceiling fiberglass insulation) needed for this job. This calculator is to be used as an estimating tool only.for pricing and availability. 33. Compare. Johns Manville. R-13, 2-in x 4-ft x 8-ft AP Foil Faced Polyisocyanurate Board Insulation. Find My Store. 182. Compare. R-5, 0.75-in x 8-ft x 4-ft RMAX Thermasheath Faced …2288. Multiple Options Available. Owens Corning. R-19 Kraft Faced Fiberglass Roll Insulation 48.96-sq ft (15-in W x 39.2-ft L) Individual Pack. Shop the Collection. 2020. Multiple Options Available. Owens Corning. R-13 Wall 106.56-sq ft Kraft Faced Fiberglass Batt Insulation.The barrier should be as tall as your installed insulation height. Install attic rulers and mark the desired thickness as a guideline to be used during application. Place the blowing machine on a level surface outside the building or in a garage. Plug the machine into a 110-volt electrical outlet.There are four main types of home insulation products on the market today: fiberglass insulation, mineral wool insulation, cellulose insulation and spray foam insulation. One way you can compare and contrast the performance of each is by their R-Values. R-Values are a material's way of resisting heat flow. The higher the R-Value, the greater ...An all round performer - ROCKWOOL RWA45 is a robust insulation solution for a range of general building projects as well as specialist specifications such as schools, hospitals, offshore platforms and ships. The insulation provides excellent acoustic, thermal and fire performance and can be ordered to meet specialist requirements in bespoke thicknesses and densities.Shop ROCKWOOL SAFE 'n' SOUND Attic Wall 59.7-sq ft Unfaced Stone Wool Batt Insulation in the Batt Insulation department at Lowe's.com. ROCKWOOL SAFE‘n’SOUND is a stone wool insulation product that can reduce noise and sound absorption in residential wood and steel stud construction.Shop ROCKWOOL SAFE 'n' SOUND Attic Wall 59.7-sq ft Unfaced Stone Wool Batt Insulation in the Batt Insulation department at Lowe's.com. ROCKWOOL safe‘n’sound is a stone wool insulation product that can reduce noise and sound absorption in residential wood and steel studRock wool insulation. Rock wool insulation originates from a volcanic rock that is melted at a temperature around 1,600 °C. Afterwards, it is spun into a package of wool. The rock wool insulation is bound together by means of resins and oils, which give the material waterproof qualities as well. Rockwool and Isover are the most well-known ...ROCKWOOL SafenSound is a stone wool batt insulation designed for sound dampening of floors in residential wood stud construction where superior acoustical performance and fire resistance are required. SafenSound has excellent acoustical dampening properties and provides an easy friction fit into floor and ceiling applications maximizing the peace and …Shop Owens Corning R-49 Attic 48-sq ft Faced Fiberglass Batt Insulation in the Batt Insulation department at Lowe's.com. Owens Corning PINK Insulation is soft to the touch and easy to install. Kraft-faced insulation has a vapor retarder that helps to control moisture transmissionAlso known as loose-fill insulation, blown-in insulation is typically cellulose, fiberglass, or mineral wool. Blown-in fiberglass insulation is made from tiny glass fibers. It's naturally fire-resistant. To achieve R19 in an attic, it must be 6.75″ thick, which requires about 8 bags per 1,000 square feet.Rockwool ComfortBatt Stone Wool Insulation is a top-notch exterior wall insulation. Rockwood ComfortBatt provides easy installation that prevents over.Cost of Mineral Wool Insulation. Mineral wool insulation typically costs between $1.40 and $2.10 per square foot. Insulation, in general, most commonly ranges between $0.25 and $2.00 per square foot. Mineral wool insulation tends to be higher in cost for a few reasons.R-15 faced insulation batt, easy 2x4 wall install. Advanced fiber technology recovers without shaking or fluffing. Creates less dust—less mess and faster clean up. Safe, proven ingredients. Cost-effective solution for a more comfortable home. Insulation offers sound proofing benefits by helping to reduce unwanted noiseShop ROCKWOOL Wood stud R-28 Attic Wall 29.9-sq ft Unfaced Stone Wool Batt Insulation at Lowe's.com. ROCKWOOL COMFORTBATT is a stone wool insulation product for improved sound absorption and fire protection in residential wood and steel construction.R-30 faced insulation batt, easy attic and floor install. Advanced fiber technology recovers without shaking or fluffing. Creates less dust—less mess and faster clean up. Safe, proven ingredients. Cost-effective solution for a more comfortable home. Insulation offers sound proofing benefits by helping to reduce unwanted noiseStone wool insulation improves your home's energy efficiency by creating a thermal barrier between its interior and exterior. Because it's made from molten rock, minerals and steel slag, it's resistant to mold and mildew growth and non-combustible, resisting temperatures up to 1800 degrees Fahrenheit. Inside your home, high-density stone ...Shop ROCKWOOL SAFE 'n' SOUND Attic Wall 59.7-sq ft Unfaced Stone Wool Batt Insulation in the Batt Insulation department at Lowe's.com. ROCKWOOL safe‘n’sound is a stone wool insulation product that can reduce noise and sound absorption in residential wood and steel studR-value is the measurement of an insulation's ability to prevent heat flow. The higher the R-value, the more insulating power it provides. Stone wool insulation is dimensionally stable and does not contain any blowing agents, meaning that the products installed will stay in place and the R-value will remain the same year after year.Pickup Free Delivery Fast Delivery. ROCKWOOL. COMFORTBATT R-30 Attic Wall 30.7-sq ft Unfaced Stone Wool Batt Insulation. ROCKWOOL. COMFORTBATT R-15 Attic Wall 59.7-sq ft Unfaced Stone Wool Batt Insulation. ROCKWOOL. COMFORTBATT R-23 Attic Wall 39.8-sq ft Unfaced Stone Wool Batt Insulation. ROCKWOOL.R-19 Wall 87.18-sq ft Kraft Faced Fiberglass Batt Insulation. Shop the Collection. Multiple Options Available. Johns Manville. R-30 Attic 88-sq ft Kraft Faced Fiberglass Batt Insulation. Shop the Collection. Multiple Options Available. Johns Manville. R-19 Wall 133.68-sq ft Kraft Faced Fiberglass Batt Insulation.Exposed floor insulation is the answer. Installed in between the wooden beams or against the underside of a concrete floor over a crawlspace, it can reduce heat loss to almost zero and increase energy efficiency through innovative use of sustainable materials. Keeps out cold air and prevents warm air escaping. Increases the energy efficiency of ...Shop undefined Insulation Supports 15.5-in Carbon Steel Wire 100-Pack - 16-in On-Center Floor Joist Spacing in the Insulation Accessories & Supports department at Lowe's.com. Our insulation supports are made of 13 gauge carbon steel spring wire and cut with a 45° angle tip to dig into wood floor joists. We package our insulationPickup Free Delivery Fast Delivery. Sort & Filter (1) ROCKWOOL. SAFE 'n' SOUND Attic Wall 59.7-sq ft Unfaced Stone Wool Batt Insulation. ROCKWOOL. COMFORTBATT R-15 Attic Wall 59.7-sq ft Unfaced Stone Wool Batt Insulation. ROCKWOOL. COMFORTBATT R-23 Attic Wall 39.8-sq ft Unfaced Stone Wool Batt Insulation. ROCKWOOL.Owens Corning. Thermafiber Fire and Sound Guard Plus R-13 Wall 39.2-sq ft Unfaced Mineral Wool Batt Insulation. 68. Owens Corning. Thermafiber Fire and Sound Guard Plus R-23 Wall 37.53-sq ft Unfaced Mineral Wool Batt Insulation. Owens Corning. Thermafiber Fire and Sound Guard Plus R-21 Wall 45.04-sq ft Unfaced Mineral Wool Batt Insulation.R-23 Mineral wool batt can be installed within exterior 2x6 wall. Easy to cut and install, even around construction irregularities. Fire resistant, mold resistant and non-corrosive. Flexible Insulation is easy to cut and install, allowing it to conform to building shapes and construction irregularities. Mold resistant.Rockboard ® is a premium multi-purpose board insulation to be used in walls, ceilings and floors for acoustic and thermal applications. These include insulating mechanical or utility rooms, or adding a barrier to noise and fire. Available in multiple variations to meet project requirements, use either Rockboard 40 or Rockboard 60.Duct Roll Insulation. Pickup Free Delivery Fast Delivery. Sort & Filter (1) Reflectix. R-21 Attic Wall Unfaced Reflective Roll Insulation 50-sq ft (24-in W x 25-ft L) Individual Pack. Reflectix. R-21 Attic Wall Unfaced Reflective Roll Insulation 400-sq ft (48-in W x 100-ft L) Individual Pack. Reflectix.Shop Owens Corning Thermafiber Fire and Sound Guard Plus R-15 Wall 39.2-sq ft Unfaced Mineral Wool Batt Insulation in the Batt Insulation department at Lowe's.com. Thermafiber Fire and Sound Guard Plus mineral wool insulation is designed to provide excellent thermal performance, noise control and fire resistance inR-Value Insulation Calculator. Input depth of existing blown-in insulation (in inches). Click the button to calculate the approximate R-value for this job. This calculator is to be used as an estimating tool only. When adding insulation, R-value is one of the first considerations. Use this calculator to estimate R-value for your space.For example, getting enough R15 insulation to cover a square foot of space would cost about $0.62. Conversely, the same amount of R22 insulation would be twice as expensive, if not more. Generally speaking, mineral wool insulation is twice as expensive as fiberglass.Owens Corning. R-19 Kraft Faced Fiberglass Roll Insulation 48.96-sq ft (15-in W x 39.2-ft L) Individual Pack. Shop the Collection. Multiple Options Available. Owens Corning. R-30 Attic Unfaced Fiberglass Roll Insulation 31.25-sq ft (15-in W x 25-ft L) Individual Pack. Shop the Collection. Multiple Options Available. Sponsored.rti-prorox-sl-940_na_en. Explore the comprehensive range of ROCKWOOL Technical Insulation products designed to meet the highest standards in insulation performance and fire safety.Roxul - Rockwool AFB (Acoustical Fire Batt) is a batt insulation product designed specifically for application in wall/floor systems where acoustical performance and fire resistance are the primary concerns. This noncombustible lightweight product has excellent acoustical dampening properties and is dimensionally stable which makes it ideal for ...Multiple Options Available. Johns Manville. R-13 Wall Kraft Faced Fiberglass Roll Insulation 40-sq ft (15-in W x 32-ft L) Individual Pack. Shop the Collection. Reflectix. R-21 Attic Wall Unfaced Reflective Roll Insulation 50-sq ft (24-in W x 25-ft L) Individual Pack. Multiple Options Available.Benefits. Reduces noise and absorbs sound to help create quieter, more productive environments. Works to contain a fire and prevent its spread. Resists water and does not rot or promote the growth of mildew, fungi or mold. Features a lightweight design and installs easily.R-value is the measurement of an insulation's ability to prevent heat flow. The higher the R-value, the more insulating power it provides. Stone wool insulation is dimensionally stable and does not contain any blowing agents, meaning that the products installed will stay in place and the R-value will remain the same year after year.Compare. Johns Manville. R-13 Wall 163.39-sq ft Kraft Faced Fiberglass Batt Insulation. Shop the Collection. Find My Store. 419. Compare. Johns Manville. R-30 Attic Unfaced Fiberglass Roll Insulation 31.25-sq ft (15-in W x 25-ft L) Individual Pack.Rockboard ® is a premium multi-purpose board insulation to be used in walls, ceilings and floors for acoustic and thermal applications. These include insulating mechanical or utility rooms, or adding a barrier to noise and fire. Available in multiple variations to meet project requirements, use either Rockboard 40 or Rockboard 60.Shop undefined R-1.5, 0.5-in x 4-ft x 8-ft Faced Fiberboard Board Insulation with Sound Barrier in the Board Insulation department at Lowe's.com. Easy to handle, Environmentally friendly, insulation board for your next projectShop Reflectix Attic Unfaced Reflective Roll Insulation 500-sq ft (48-in W x 125-ft L) Individual Pack in the Roll Insulation department at Lowe's.com. Many regions of the United States now recognize the energy advantages available to the consumer who installs a radiant barrier in the attic of their home. WhenROCKWOOL insulation rolls are flexible products that can be installed in attic, roof, floor spaces.. They provide protection against heat loss - and can help reduce noise transmission in buildings too. Our versatile rolls of insulation are available in a variety of thicknesses, widths and lengths. Read on to find out how they can benefit your project.Fiberglas™ Insulation PINK Next Gen™ Fiberglas™ FOAMULAR® XPS Thermafiber® Mineral Wool Owens Corning + Natural Polymers Spray Foam new AttiCat® Loosefill ProPink® Complete Blown-in Wall System ProCat® Professional Loosefill Residential Accessories All ProductsPickup Free Delivery Fast Delivery. Sort & Filter (1) ROCKWOOL. COMFORTBATT R-15 Attic Wall 59.7-sq ft Unfaced Stone Wool Batt Insulation. ROCKWOOL. COMFORTBATT R-23 Attic Wall 39.8-sq ft Unfaced Stone Wool Batt Insulation. ROCKWOOL. COMFORTBATT R-30 Attic Wall 30.7-sq ft Unfaced Stone Wool Batt Insulation. ROCKWOOL.Mineral wool is lightweight and ideal for sound control throughout interior cavities. Unfaced mineral wool batts do not have a vapor barrier and can be added to existing insulation. Melting point of 2000F helps delay the spread of fire. Batts are pre-cut for use in standard 8-ft walls with 16-in on-center steel stud spacing. Easy to cut and installSuspended ceiling insulation panels, slabs or rolls can enhance thermal performance, reduce sound transfer and reduce the risk of fire spreading. Suspended ceilings are normally applied beneath concrete floors. They serve many purposes in commercial and residential properties - covering up pipes and air ducts, creating space for light points ...Easily cut, non-combustible, excellent sound absorbency. Does not rot or sustain vermin, does not promote growth of fungi or mildew. Chemically inert, non-corrosive, water resistant. CFC and HCFC-free product. Made from natural and recycled materials. 3.5 x 15.25 x 47". Covers up to 59.7 sq.ft. R14.ROCKWOOL Comfortboard® 80 is a rigid stone wool board designed for continuous insulation applications. A non-structural sheathing product, Comfortboard 80 provides increased thermal performance to the building envelope. Comfortboard 80 is now available in 4" and 5" thicknesses, providing thermal performance up to R21 for building envelopes.Shop ROCKWOOL SAFE 'n' SOUND Attic Wall 59.7-sq ft Unfaced Stone Wool Batt Insulation in the Batt Insulation department at Lowe's.com. ROCKWOOL SAFE‘n’SOUND is a stone wool insulation product that can reduce noise and sound absorption in residential wood and steel stud construction.Rockwool COMFORTBATT Thermal Home Insulation keeps your home warm in th, ROCKWOOL 8024 Esquesing Line Milton, ON L9T 6W3 Tel: 1 800 265 6878 , Shop Johns Manville R-30 Attic 88-sq ft Kraft Faced , ROCKWOOL Comfortbatt®stone wool insulation is non-combustib, Fossils are primarily found in sedimentary rocks because these rocks form at low temperatures and pressures. Ig, Safe‘n’Sound Fire & Soundproof Insulation. ROCKWOO, Lowe’s is here to help with our blown-in insulation installation service. We can fill in gaps and, Acoustical Performance for ROCKWOOL 60 - 6lb Per Cu Ft. - 2&, Owens Corning. R-19 Kraft Faced Fiberglass Roll Insulatio, Insulation 12018-L ROCKWOOL Comfortbatt® is a semi-rig, 23 Inch Wide ROCKWOOL Batt Insulation. Pickup Free Delivery Fa, Johns Manville. Johns Manville is a leader in premium-quality i, Robust & adaptable – stone wool is dimensionally stable, yet able, Roll-in insulation is one of the most commonly used types , Shop ROCKWOOL COMFORTBATT R-30 Attic Wall 30.7-sq , Find 24 Inch Wide ROCKWOOL batt insulation at Lowe&#, R-30 Comfortbatt 7-1/4 in. x 15 in. x 47 in. Fire Resi, Mineral wool: Mineral wool can refer to either rock wool o.