Depending on where you live and the part of your home you’re insulating (walls, crawlspace, attic, etc.), you’ll need a different R-Value. Typical recommendations for exterior walls are R-13 to R-23, while R-30, R-38 and R-49 are common for ceilings and attic spaces. See the Department of Energy’s (DOE) ranges for recommended levels of ...In addition, the 116’4″ x 196’4″x22’6″building has a 6″ R-19 single-layer insulation system installed in its’ walls. The insulation installed is faced with hardwearing, high-performance facing material, which acts as a vapor retarder while protecting the insulation blankets against punctures, tears, moisture and general damage.COMFORTBATT R-15 Attic Wall 59.7-sq ft Unfaced Stone Wool Batt Insulation Individual Pack. Model # RXCB351525. Find My Store. for pricing and availability. 919. ROCKWOOL. COMFORTBATT R-23 Attic Wall 39.8-sq ft Unfaced Stone Wool Batt Insulation Individual Pack. Model # RXCB551525. Find My Store.Shop Owens Corning R-49 Attic 48-sq ft Faced Fiberglass Batt Insulation Individual Pack 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 transmissionInsulPure R-19 Wall Kraft Faced Fiberglass Roll Insulation 48.96-sq ft (6.25-in W x 39.2-ft L) Multi-pack. Model # 649746. Find My Store. for pricing and availability. 3. 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. House Insulation – Total. $165.00 - $180.00. $225.00 - $255.00. $285.00 - $340.00. House Insulation – Total Average Cost per square foot. $1.73. $2.40. $3.13. Cost can add up quickly, especially if you’re a novice and have never attempted a House Insulation installation before.Depending on where you live and the part of your home you’re insulating (walls, crawlspace, attic, etc.), you’ll need a different R-Value. Typical recommendations for exterior walls are R-13 to R-23, while R-30, R-38 and R-49 are common for ceilings and attic spaces. See the Department of Energy’s (DOE) ranges for recommended levels of ...Johns Manville B240 R19 Kraft Fiberglass Insulation, 6.5 x 15-In. x 39' 2" Roll (2) 2 product ratings - Johns Manville B240 R19 Kraft Fiberglass Insulation, 6.5 x 15-In. x 39' 2" Roll $717.99Aug 24, 2023 · R30 insulation is 9.5 inches thick and will save the preserved temperature from escaping when sun rays fall directly on the roof. If you live in extreme weather conditions, we advise you to adjust these R-value levels according to your climate. Add another couple of inches of insulation in very hot or cold areas. It is pulverized into a fine powder that adheres and remains a part of the insulation. Cellulose will settle after installation, creating a dense continuous layer, helping to block air transfer through any holes into your attic. All of our cellulose blown in insulation is: 80% recycled contend. Treated with 100% Borate Fire Retardant Formula.The top-selling product within Fiberglass Insulation is the Owens Corning R-19 Kraft Faced Fiberglass Insulation Continuous Roll 15 in. x 39.2 ft.. Which brand has the largest assortment of Fiberglass Insulation at The Home Depot? Owens Corning has the largest assortment of Fiberglass Insulation. What are the shipping options for Fiberglass ...Johns Manville Formaldehyde-free™ Kraft-faced thermal and acoustical insulation offers R-Values up to R-49, and is offered in precut batts to fit standard wall cavities or rolls for custom installation in any size cavity. Kraft-faced insulation is ideal for moisture control in exterior walls, reduces sound transmission through walls, ceilings ... Feb 13, 2002 · Properly insulating 2 x 6 rafters in …. I’m stuck ! I need to insulate 2″ x 6″ rafters in an attic remodel I will be doing. I have looked at a number of sources and they offer two options. 1.-Insulate leaving an air space 2.-Pack the space with insulation and do not leave an air space. They caution against not leaving enough air space ... Nov 27, 2019 · He was adamant that only 5.5 inches of insulation (R-39) made sense and that to fill the whole bay at 7 inches (R-50) would add only a 2% efficiency gain. To him, this was not worth it. 30ish% of my roof surface is cathedral at 350 sq ft. R-39 cost per square foot – $9.91 Knauf Insulation. R-38 EcoBatt Kraft Faced Fiberglass Insulation Batt 12 in. x 16 in. x 48 in. Add to Cart. Compare. More Options Available $ 962. 16 /pallet ($ 7.52 ...R-19 EcoRoll Kraft Faced Fiberglass Insulation Roll 6-1/4 in. x 15 in. x 39.16 ft. ... The top-selling product within Fiberglass Insulation is the Owens Corning R-13 ...He was adamant that only 5.5 inches of insulation (R-39) made sense and that to fill the whole bay at 7 inches (R-50) would add only a 2% efficiency gain. To him, this was not worth it. 30ish% of my roof surface is cathedral at 350 sq ft. R-39 cost per square foot – $9.91The temperature gradient calculation for this construction predicts a temperature of 60°F in the eave space on a design day (70°F indoors/0°F outdoors): Assembly U-value (weighted average of at and between studs): 0.024. Assembly R-value (1/U): 41.67. U-value from outdoors to attic (weighted average): 0.028.COMFORTBATT R-23 Attic Wall 39.8-sq ft Unfaced Stone Wool Batt Insulation Individual Pack. Model # RXCB551525. Find My Store. for pricing and availability. 575. Multiple Options Available. Johns Manville. R-19 Wall 133.68-sq ft Kraft Faced Fiberglass Batt Insulation Individual Pack. Shop the Collection. ComfortBatt 3-1/2 in. x 15.25 in. x 47 in. R-13 Stone Wool Insulation (12-Pieces per pack) Add to Cart. Compare. Installation Services. Attic Insulation Installation.ComfortBatt 3-1/2 in. x 15.25 in. x 47 in. R-13 Stone Wool Insulation (12-Pieces per pack) Add to Cart. Compare. Installation Services. Attic Insulation Installation.May 1, 2012 · The R-value of your insulation is an important aspect, which will be determined by the thickness of the rafters. Normally 2-by-6 rafters will compliment R-19 insulation, and 2-by-8 or 2-by-10 rafters will go with R-30 insulation. You will need to shop for a knockout stapler in order to complete the insulation at a later stage. R38 to R49. R25 to R30. Wall Insulation - Whenever exterior siding is removed on an: Uninsulated wood-frame wall: Drill holes in the sheathing and blow insulation into the empty wall cavity before installing the new siding, and. Zones 3–4: Add R5 insulative wall sheathing beneath the new siding.R-19 EcoRoll Kraft Faced Fiberglass Insulation Roll 6-1/4 in. x 15 in. x 39.16 ft. ... The top-selling product within Fiberglass Insulation is the Owens Corning R-13 ... The top-selling product within Fiberglass Insulation is the Owens Corning R-19 Kraft Faced Fiberglass Insulation Continuous Roll 15 in. x 39.2 ft.. Which brand has the largest assortment of Fiberglass Insulation at The Home Depot? Owens Corning has the largest assortment of Fiberglass Insulation. What are the shipping options for Fiberglass ...The thickness of your R-38 insulation will depend on the material you have, the brand, and how it's installed. The fiberglass comes in rolls, also known as batts, which vary in size. An R-38 fiberglass batt should be approximately 12 inches thick, while the thickness of cellulose insulation of a finished, fitted product will larger.R-38C EcoTouch® Insulation Width Length Thickness R-Value1 Cathedral Ceiling Construction 15½ " (394mm) 23¾ " (603mm) 48” (1,219mm) 10¼ ” (260mm) 38.0 1. The higher the R-value, the greater the insulating power. Ask your Owens Corning representative for the fact sheet on R-values. C Insulation for cathedral ceiling applications.The Owens Corning® Fiberglas™ insulation family offers a solution tailored to the desired purpose. From making a hospital or multi-family building quieter, to protecting the mechanical systems that keep systems running and occupants comfortable, Owens Corning® Fiberglas™ insulation brings trusted performance to the insulating challenge. The temperature gradient calculation for this construction predicts a temperature of 60°F in the eave space on a design day (70°F indoors/0°F outdoors): Assembly U-value (weighted average of at and between studs): 0.024. Assembly R-value (1/U): 41.67. U-value from outdoors to attic (weighted average): 0.028. R-19 EcoRoll Kraft Faced Fiberglass Insulation Roll 6-1/4 in. x 15 in. x 39.16 ft. ... The top-selling product within Fiberglass Insulation is the Owens Corning R-13 ... Shop Owens Corning R-19 Unfaced Fiberglass Roll Insulation 48.96-sq ft (15-in W x 39.2-ft L) Individual Pack in the Roll Insulation department at Lowe's.com. Owens Corning PINK Next Gen Fiberglas insulation installs faster because it’s made like no other fiberglass insulation. R-values of ISO (also known as polyiso). ISO is an abbreviation of polyISOcyanurate. This is foil-faced polyisocyanurate; the R-value of ISO decreases over the years. R-values for rigid insulation vary from R-3.85 to R-6.8 per inch of thickness. Polyiso has the highest R-value, followed by XPS and EPS. LuapYllier Discussion starter · Apr 8, 2022. I have not received my structural plans yet but I expect my rafters to be 2x6 or at most 2x8. In my area I am required to have R38 ceiling insulation. I have looked that up and found that R38 batts are about 12" thick. With 2x6 (or even 2x8) rafters, 1" air baffles for the vented attic and a slope ...Sep 4, 2023 · Knauf EcoRoll® Kraft Faced Fiberglass Insulation with ECOSE® Technology is a leading sustainable insulation. These rolls are bonded with the revolutionary, industry-transforming, plant-based ECOSE® Technology. They are validated by UL Environment as formaldehyde free, and they contain no Red List chemicals. Made with a high degree of recycled glass, these insulation rolls cut easily for ... Mar 21, 2022 · What is the difference between R30 and R38 ratings on insulation? The R-value associated with insulation measures resistance to heat flow through the insulating material. The higher the number associated with the R-value, the greater the insulating value. Insulation with an R-Value of R-38 is about twenty percent more efficient than R-30. Dec 7, 2022 · Product Details. JM Unfaced Formaldehyde-free™ fiberglass insulation offers R-values ranging from R-11 to R-38 and provides effective thermal and noise control. Our R-30 unfaced rolls are for easy installation in 24 in. on center 2 in. x 10 in. attics and ceilings. Can be added to existing attic insulation. Owens Corning R-15 UnFaced Fiberglass Insulation Batts - All Sizes. $344.25. Owens Corning. Owens Corning R-15 Kraft Faced 3.5 in. x 15 in. x 105 in. Fiberglass Insulation FastBatts (5 Bags) $435.71. Owens Corning. Owens Corning R-19 Kraft Faced Fiberglass Insulation Batts - All Sizes. R-19 EcoRoll Kraft Faced Fiberglass Insulation Roll 6-1/4 in. x 23 in. x 39.2 ft. (12-Rolls) Knauf R-19 EcoRoll Kraft faced fiberglass Knauf R-19 EcoRoll Kraft faced fiberglass insulation with ECOSE Technology is a leading sustainable insulation. All of our rolls are bonded with the revolutionary, industry-transforming, plant-based ECOSE ...R-19 faced insulation, easy 2x6 wall and floor install; ... R-19 Kraft Faced Fiberglass Insulation Roll 23 in. x 39.2 ft. (12-Rolls) (1072) $ 881. 04 /pallet. Add to ... Contractor's License Classifications. The Arizona Registrar of Contractors issues separate licenses for commercial and residential work, and dual licenses that cover both commercial and residential, for each particular trade or field of a construction science profession. Residential contracting is defined as constructing, altering, repairing ... ROCKWOOL Comfortbatt®. Comfortbatt ® is a stone wool insulation product for use in wood and steel framing in both new residential and commercial builds and renovations. This semi-rigid batt has a unique flexible edge designed to compress as the batt is inserted into walls, attics, ceilings and floor frames. in R13, R21, and R38 thermal values. R-19 faced insulation, easy 2x6 wall and floor install; ... R-19 Kraft Faced Fiberglass Insulation Roll 23 in. x 39.2 ft. (12-Rolls) (1072) $ 881. 04 /pallet. Add to ... in layers, such as framing cavity insulation and insulating sheath-ing, shall be summed to compute the component R−value. (b) The manufacturer’s settled R−value shall be used for blown insulation. (c) Computed R−values may not include values for air films or for building materials other than insulation materials. a ZIP-Code Insulation Program, listed under Further Reading, to help deter-mine your R-value and cost estimates. This program allows you to decide the types and forms of insulation that will work best for you. Existing Homes If your home already has insulation installed, a certified contractor can evaluate your house’s current R-value Nov 16, 2022 · Insulating using Foam Board (Rigid foam) Insulation. Insulating with rigid sheets of foam board will require a thickness or depth of foam board between 9.5″ to 10.5″ to attain an R-value of R38. These rigid sheets of polystyrene or polyurethane are seldom used in residential buildings but are instead used in commercial buildings. The Owens Corning® Fiberglas™ insulation family offers a solution tailored to the desired purpose. From making a hospital or multi-family building quieter, to protecting the mechanical systems that keep systems running and occupants comfortable, Owens Corning® Fiberglas™ insulation brings trusted performance to the insulating challenge.Get free shipping on qualified R38 Fiberglass Insulation products or Buy Online Pick Up in Store today in the Building Materials Department. #1 Home Improvement Retailer Store FinderHere is an example of rolled insulation installed in an attic. R-49 insulation thickness is commonly used in attics in northern climates. R-30 insulation thickness, or even R-19 thickness is often used in warmer climates. Note that R30 batt insulation thickness is just 9-1/2 inches thick where as R-49 batt insulation thickness is 15-1/2 inches.Building Insulation. Johns Manville is much more than a source for residential and commercial insulation. We are a dedicated industry partner. Our complete line of innovative insulation products includes: In addition to delivering well-made, reliable products, we are here to provide exceptional customer service and technical assistance to ... Shop Owens Corning R-19 Wall 77.5-sq ft Faced Fiberglass Batt Insulation Individual Pack in the Batt Insulation department at Lowe's.com. Owens Corning PINK Next Gen Fiberglas insulation installs faster because it’s made like no other fiberglass insulation.Each R-13 fiberglass insulation batt is 3.5 in. D x 23 in. W x 93 in. L; Each individual bag covers 163.40 sq. ft. of R-13 insulation; R-13 value improves personal comfort in your home or office; R-13 insulation has high-quality materials made of resilient fibers for more energy efficiency and is ENERGY STAR rated Sep 4, 2023 · Knauf EcoRoll® Kraft Faced Fiberglass Insulation with ECOSE® Technology is a leading sustainable insulation. These rolls are bonded with the revolutionary, industry-transforming, plant-based ECOSE® Technology. They are validated by UL Environment as formaldehyde free, and they contain no Red List chemicals. Made with a high degree of recycled glass, these insulation rolls cut easily for ... Mar 15, 2023 · If you have questions about R like how to download and install the software, or what the license terms are, please read our answers to frequently asked questions before you send an email. News useR! 2024 will be a hybrid conference, taking place 8-11 July 2024 in Salzburg, Austria. Shop Owens Corning R-49 Attic 48-sq ft Faced Fiberglass Batt Insulation Individual Pack 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 transmission with insulation without insulation with insulation without insulation; Wood Frame 2 x 4 (3½"– 4" Batt), 16" O.C. (with ½" gypsum wallboard both sides) (with ⅝" gypsum wallboard both sides) Single studs/Single layer gypsum: 38: 35: 38: 34: Single studs/Resilient channel: 47: 39: 50: 40: Staggered studs/Single layer gypsum: 49: 39: 51* 43 ...The thickness of your R-38 insulation will depend on the material you have, the brand, and how it's installed. The fiberglass comes in rolls, also known as batts, which vary in size. An R-38 fiberglass batt should be approximately 12 inches thick, while the thickness of cellulose insulation of a finished, fitted product will larger.R-38C EcoTouch® Insulation Width Length Thickness R-Value1 Cathedral Ceiling Construction 15½ " (394mm) 23¾ " (603mm) 48” (1,219mm) 10¼ ” (260mm) 38.0 1. The higher the R-value, the greater the insulating power. Ask your Owens Corning representative for the fact sheet on R-values. C Insulation for cathedral ceiling applications.Knauf Insulation. R-38 EcoBatt Kraft Faced Fiberglass Insulation Batt 12 in. x 16 in. x 48 in. Add to Cart. Compare. More Options Available $ 962. 16 /pallet ($ 7.52 ...R38 to R49. R25 to R30. Wall Insulation - Whenever exterior siding is removed on an: Uninsulated wood-frame wall: Drill holes in the sheathing and blow insulation into the empty wall cavity before installing the new siding, and. Zones 3–4: Add R5 insulative wall sheathing beneath the new siding.Insulation ratings are measured in R-values per inch of thickness. An R-value tells you how well a type of insulation can keep heat from leaving or entering your home. Insulation R-values vary based on the type, thickness and density of the insulation material.25 lbs. Cellulose Blown-In Insulation or Spray Applied Insulation (42-Bags) SANCTUARY by Greenfiber can be installed SANCTUARY by Greenfiber can be installed in attics, walls, floors and ceilings to significantly improve the comfort, safety and well-being provided by any home. This is the first All-In-1 cellulose insulation that can be blown-in ... R-Value is a measure of insulation’s ability to resist heat traveling through it. The higher the R-Value the better the thermal performance of the insulation. The table below shows what levels of insulation are cost-effective for different climates and locations in the home. Sep 12, 2011 · 2 Pack Owens Corning R-13 Pink Kraft Faced Fiberglass Insulation Roll 15 in. x 32 ft. (Packed by Eagle Electronics) 4.2 out of 5 stars. 40. 5 offers from $75.99. Owens Corning R-19 Fiberglass Batt Insulation Fits 2x6 Floor or Walls a Total of 10 Bags and Square Footage of 775 FT. 1.0 out of 5 stars. 1. Knauf Insulation. R-30 EcoBatt Kraft Faced Fiberglass Insulation Batt 10 in. x 24 in. x 48 in. (8-Bags) Add to Cart. Compare. More Options Available $ 984. 19 2 Pack Owens Corning R-13 Pink Kraft Faced Fiberglass Insulation Roll 15 in. x 32 ft. (Packed by Eagle Electronics) 4.2 out of 5 stars. 40. 5 offers from $75.99. Owens Corning R-19 Fiberglass Batt Insulation Fits 2x6 Floor or Walls a Total of 10 Bags and Square Footage of 775 FT. 1.0 out of 5 stars. 1.Insulation R-Value. R19. R13. R6.7. R30. Savings Center. Bulk Pricing ... R-19 EcoRoll Kraft Faced Fiberglass Insulation Roll 6-1/4 in. x 15 in. x 39.16 ft. (18-Rolls ... Johns Manville B240 R19 Kraft Fiberglass Insulation, 6.5 x 15-In. x 39' 2" Roll (2) 2 product ratings - Johns Manville B240 R19 Kraft Fiberglass Insulation, 6.5 x 15-In. x 39' 2" Roll $717.99Jun 10, 2021 · If you want to look at another approach "Larsen trusses" (so-called) are a scheme to build bigger cavities for more insulation and less thermal break that work with loose-fill insulation - effectively a non-structrual double-wall to create more insulation volume. A structural double-wall is another option, but not normally useful in a retrofit ... In addition, be sure to install high and low vents. From there, install the rigid insulation right up to the strips. You could use either three layers of 2" rigid which would give you approximately R-30 or use one layer of of 4" and another of 2" which will give you the same R-valve.Foam insulation is very messy to work with and bad for the lungs.Insulating using Foam Board (Rigid foam) Insulation. Insulating with rigid sheets of foam board will require a thickness or depth of foam board between 9.5″ to 10.5″ to attain an R-value of R38. These rigid sheets of polystyrene or polyurethane are seldom used in residential buildings but are instead used in commercial buildings.R-19 EcoRoll Kraft Faced Fiberglass Insulation Roll 6-1/4 in. x 15 in. x 39.16 ft. ... The top-selling product within Fiberglass Insulation is the Owens Corning R-13 ... Shop Owens Corning R-19 Wall 77.5-sq ft Faced Fiberglass Batt Insulation Individual Packundefined at Lowe's.com. Owens Corning PINK Next Gen Fiberglas insulation installs faster because it’s made like no other fiberglass insulation. PINK Next Gen fiberglass See full list on todayshomeowner.com Shop Johns Manville R-13 Wall 163.39-sq ft Kraft Faced Fiberglass Batt Insulation Individual Packundefined at Lowe's.com. Johns Manville formaldehyde-free kraft-faced thermal and acoustical insulation offers R-values up to R-49. It is ideal for moisture control in exterior walls, R38 to R49. R25 to R30. Wall Insulation - Whenever exterior siding is removed on an: Uninsulated wood-frame wall: Drill holes in the sheathing and blow insulation into the empty wall cavity before installing the new siding, and. Zones 3–4: Add R5 insulative wall sheathing beneath the new siding.R-values of ISO (also known as polyiso). ISO is an abbreviation of polyISOcyanurate. This is foil-faced polyisocyanurate; the R-value of ISO decreases over the years. R-values for rigid insulation vary from R-3.85 to R-6.8 per inch of thickness. Polyiso has the highest R-value, followed by XPS and EPS.The top-selling product within Fiberglass Insulation is the Owens Corning R-19 Kraft Faced Fiberglass Insulation Continuous Roll 15 in. x 39.2 ft.. Which brand has the largest assortment of Fiberglass Insulation at The Home Depot? Owens Corning has the largest assortment of Fiberglass Insulation. What are the shipping options for Fiberglass ...In addition, be sure to install high and low vents. From there, install the rigid insulation right up to the strips. You could use either three layers of 2" rigid which would give you approximately R-30 or use one layer of of 4" and another of 2" which will give you the same R-valve.Foam insulation is very messy to work with and bad for the lungs.
R-38C EcoTouch® Insulation Width Length Thickness R-Value1 Cathedral Ceiling Construction 15½ " (394mm) 23¾ " (603mm) 48” (1,219mm) 10¼ ” (260mm) 38.0 1. The higher the R-value, the greater the insulating power. Ask your Owens Corning representative for the fact sheet on R-values. C Insulation for cathedral ceiling applications.. Mandt bank atm check deposit limit
Width (Inches): 23. Multiple Options Available. Owens Corning. R-19 Single Faced Fiberglass Roll Insulation 75.07-sq ft (23-in W x 39.2-ft L) Individual Pack. Model # RF41P. Find My Store. for pricing and availability. 15. Multiple Options Available.Owens Corning R-15 UnFaced Fiberglass Insulation Batts - All Sizes. $344.25. Owens Corning. Owens Corning R-15 Kraft Faced 3.5 in. x 15 in. x 105 in. Fiberglass Insulation FastBatts (5 Bags) $435.71. Owens Corning. Owens Corning R-19 Kraft Faced Fiberglass Insulation Batts - All Sizes. Owens Corning R-15 UnFaced Fiberglass Insulation Batts - All Sizes. $344.25. Owens Corning. Owens Corning R-15 Kraft Faced 3.5 in. x 15 in. x 105 in. Fiberglass Insulation FastBatts (5 Bags) $435.71. Owens Corning. Owens Corning R-19 Kraft Faced Fiberglass Insulation Batts - All Sizes.R-19 EcoRoll Kraft Faced Fiberglass Insulation Roll 6-1/4 in. x 23 in. x 39.2 ft. (12-Rolls) Knauf R-19 EcoRoll Kraft faced fiberglass Knauf R-19 EcoRoll Kraft faced fiberglass insulation with ECOSE Technology is a leading sustainable insulation. All of our rolls are bonded with the revolutionary, industry-transforming, plant-based ECOSE ...Shop ROCKWOOL COMFORTBATT R-23 Attic Wall 39.8-sq ft Unfaced Stone Wool Batt Insulation Individual Pack in the Batt Insulation department 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.Building Insulation. Johns Manville is much more than a source for residential and commercial insulation. We are a dedicated industry partner. Our complete line of innovative insulation products includes: In addition to delivering well-made, reliable products, we are here to provide exceptional customer service and technical assistance to ... COMFORTBATT R-15 Attic Wall 59.7-sq ft Unfaced Stone Wool Batt Insulation Individual Pack. Model # RXCB351525. Find My Store. for pricing and availability. 919. ROCKWOOL. COMFORTBATT R-23 Attic Wall 39.8-sq ft Unfaced Stone Wool Batt Insulation Individual Pack. Model # RXCB551525. Find My Store.Here is an example of rolled insulation installed in an attic. R-49 insulation thickness is commonly used in attics in northern climates. R-30 insulation thickness, or even R-19 thickness is often used in warmer climates. Note that R30 batt insulation thickness is just 9-1/2 inches thick where as R-49 batt insulation thickness is 15-1/2 inches.Shop ROCKWOOL COMFORTBATT R-23 Attic Wall 39.8-sq ft Unfaced Stone Wool Batt Insulation Individual Pack in the Batt Insulation department 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.He was adamant that only 5.5 inches of insulation (R-39) made sense and that to fill the whole bay at 7 inches (R-50) would add only a 2% efficiency gain. To him, this was not worth it. 30ish% of my roof surface is cathedral at 350 sq ft. R-39 cost per square foot – $9.91Depending on where you live and the part of your home you’re insulating (walls, crawlspace, attic, etc.), you’ll need a different R-Value. Typical recommendations for exterior walls are R-13 to R-23, while R-30, R-38 and R-49 are common for ceilings and attic spaces. See the Department of Energy’s (DOE) ranges for recommended levels of ... R-38C EcoTouch® Insulation Width Length Thickness R-Value1 Cathedral Ceiling Construction 15½ " (394mm) 23¾ " (603mm) 48” (1,219mm) 10¼ ” (260mm) 38.0 1. The higher the R-value, the greater the insulating power. Ask your Owens Corning representative for the fact sheet on R-values. C Insulation for cathedral ceiling applications. What is the difference between R30 and R38 ratings on insulation? The R-value associated with insulation measures resistance to heat flow through the insulating material. The higher the number associated with the R-value, the greater the insulating value. Insulation with an R-Value of R-38 is about twenty percent more efficient than R-30..