Insulation r30

Step 1: Install the Sheeting. Spread plastic sheeting over the crawlspace to prevent ground moisture from entering the area. Check the insulation manufacturer's instructions for the necessary thickness of plastic. Overlap the seams by about 12 inches and run the plastic up the walls at least 6 inches. Tape the plastic to the walls and seal the ...

Insulation r30. Covers 88 sq.ft. ( $1.69 /sq.ft.) $149.00. Buy 15 or more $126.65. Pay $124.00 after $25 OFF your total qualifying purchase upon opening a new card. Apply for a Home Depot Consumer Card. R-30 faced insulation, easy attic and floor install. Stiffer batts slide in and stay put for fast install. Shed-resistant, for less dust and easier cleanup.

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.

Owens Corning® FOAMULAR® & FOAMULAR® NGX® 250 Extruded Polystyrene (XPS) Rigid Foam Insulation is a closed cell, highly moisture-resistant foam board well suited to meet the insulation needs for a wide variety of residential and commercial building applications. Download Data Sheet.The R-value of spray foam insulation ranges from 3.5 to 7 per inch thickness. For open-cell spray foam the R-value is approximately 3.5 whereas for closed-cell spray foam it is 6. Spray foam insulation thickness. The thickness required for spray form insulation when insulating, for eg; an attic, depends on the R-value required for …Johns Manville R-30 24 in. x 48 in. Unfaced Fiberglass Insulation Batt. $ 84.58. Quick View. Attic Ceiling Insulation. Johns Manville R-30 Kraft Faced Fiberglass Insulation Batt 16 in. x 48 in. $ 65.03. Quick View. Attic Ceiling Insulation. Johns Manville R-30 Kraft Faced Fiberglass Insulation Batt 16 in. x 48 in. (8 Bags)Get free shipping on qualified R30, Batt Insulation products or Buy Online Pick Up in Store today in the Building Materials Department.While natural wool blown-in insulation is an excellent insulation material, it can be more expensive than other types of insulation, typically between $1.50 and $3.10 per square foot. Also, its R ... Get free shipping on qualified R30, Unfaced Insulation products or Buy Online Pick Up in Store today in the Building Materials Department. Knauf Ecoroll R-19 Unfaced Fiberglass Insulation Roll 6.25 in x 15 in x 39.2 ft (6 Rolls) $192.39. Owens Corning R-15 UnFaced Fiberglass Insulation Batts - All Sizes. $381.07. Owens Corning R-19 Un-Faced Fiberglass Insulation Batts - All Sizes. $258.34. Ecobatt R-30 Kraft Faced Fiberglass Insulation Batts - All Sizes. $382.68.

Get free shipping on qualified R30, Batt, Unfaced Fiberglass Insulation products or Buy Online Pick Up in Store today in the Building Materials Department. ... Attic insulation improves home energy efficiency and comfort. Get started with a free consultation for stress-free and mess-free professional installation.r30 insulation. Related Products. R-30 Faced Fiberglass Insulation Batt 24 in. x 48 in. (1 Bag) Owens Corning PINK Next Gen Fiberglas insulation installs faster because it's made like no other fiberglass insulation. PINK Next Gen fiberglass insulation batts recover instantly, cut and split cleanly, glide in easily and stay put in the cavity ...9 Results Insulation R-Value: R30 Faced or Unfaced: Unfaced Clear All. Sort by: Top Sellers. Top Sellers Most Popular Price Low to High Price High to Low Top Rated Products. ... Attic insulation improves home energy efficiency and comfort. Get started with a free consultation for stress-free and mess-free professional installation.Get free shipping on qualified R30 Insulation products or Buy Online Pick Up in Store today in the Building Materials Department.R30 insulation thickness for different types of insulation. As you can see from the table, the thinnest R30 insulation is closed-cell spray foam and the thickest is blown-in fiberglass. Table of Contents. R30 …Owens Corning EcoTouch Insulation is soft to the touch, easy to cut and install. It delivers comfort helping homes stay cooler in the summer and warmer in the winter to reduce energy costs. ... R30. Insulation Type. Batt. Number of Pieces. 10. Pack Size. 1. Product Weight (lb.) 46.32 lb. Roll or Batt. Batt. Warranty / Certifications. Warranty ...Get free shipping on qualified Faced, R30 Insulation products or Buy Online Pick Up in Store today in the Building Materials Department.Shop ROCKWOOL COMFORTBATT R-30 Attic Wall 29.9-sq ft Unfaced Stone Wool Batt Insulation in the Batt Insulation department at Lowe's.com. ROCKWOOL COMFORTBATT is a stone wool insulation …

3 Apr 2018 ... Best way to cut and install fiberglass batt insulation. This is the fast easy and best way to cut fiberglass insulation that I've found.Insulating a large areas of glass can pose a challenge. If you want to keep out the summer sun and keep your energy bills down, consider making a DIY insulation panel for relativel...9.3 inches. Moreover, when considering R30 insulation thickness, it’s important to factor in the specific needs of your home, including climate, moisture levels, and energy efficiency goals. R30 insulation, known for its substantial thermal resistance, can play a pivotal role in maintaining a consistent indoor temperature and controlling ...6 Aug 2023 ... Well-known member ... Generally, for meeting code, you can just add them, so R43. If the batts are perpendicular to each other - without leaving ...The Owens Corning R-30 Foil Faced Batts with PureFiber Technology is flexible insulation designed to improve the thermal performance of wall and roof/ceiling assemblies. Foil …

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Cost: Generally, homeowners seek R value between R30 and R50, and to achieve that for an area of 1,000 sq. ft., the total cost would be between $1,000 to $1,800, depending on the project specifics, ease of access, and property location. Insulation blankets: Batt and Roll Insulation. This is the second of two most popular types of …Knauf EcoBatt« Kraft Faced Fiberglass Insulation with ECOSE« Technology is a leading sustainable insulation. These batts 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 …Get free shipping on qualified Faced, R30 Insulation products or Buy Online Pick Up in Store today in the Building Materials Department.Insulation thickness to reach the R-30 value depends on the insulation material, but fiberglass batts of R-30 insulation are 9 1/2 inches thick. Rigid foam insulation provides the ... Fiberglass batt insulation for use in wood-framed attics, ceiling, basements and floors. Unfaced fiberglass batts do not have a vapor barrier and can be added to existing insulation. Improves energy efficiency and provides sound control. Batts are pre-cut in standard 4-ft length for use with 16-in on-center joist spacing. press in place between ... R-30 faced fiberglass insulation pre-cut for ceilings & attics; Provides temp. control, sound absorption and moisture mitigation; Natural colors, eco-friendly formaldehyde-free, recycled content

25 Feb 2019 ... R30 fiberglass blow insulation install.Please be advised that there is a difference in “R30 Roof Systems”. R30 roof insulation can be used in a variety of different roof systems. Each system has a different thermal performance. An R19+R11 Filled Cavity Liner System is very common today. The R19 insulation is used to fill the cavity between the purlins.Eight inches of poor quality insulation may have a higher and better R-Value than one inch of top-quality insulation. So, you need to know an insulation product’s thickness as well as its R-Value in order to compare it to another product. As a foil-faced polyisocyanurate foam insulation, Enerfoil TM ’s R-Value actually more than doubles ... EcoBatt® Insulation. Engineered to offer thermal and acoustical properties customers trust. Made with our revolutionary ECOSE® technology and validated formaldehyde-free. It's certified to the toughest indoor air quality certification in the industry, GREENGUARD Gold. Step 1: Install the Sheeting. Spread plastic sheeting over the crawlspace to prevent ground moisture from entering the area. Check the insulation manufacturer's instructions for the necessary thickness of plastic. Overlap the seams by about 12 inches and run the plastic up the walls at least 6 inches. Tape the plastic to the walls and seal …10 Jul 2022 ... Share your videos with friends, family, and the world.Covers 88 sq.ft. ( $1.69 /sq.ft.) $149.00. Buy 15 or more $126.65. Pay $124.00 after $25 OFF your total qualifying purchase upon opening a new card. Apply for a Home Depot Consumer Card. R-30 faced insulation, easy attic and floor install. Stiffer batts slide in and stay put for fast install. Shed-resistant, for less dust and easier cleanup.Insulating a large areas of glass can pose a challenge. If you want to keep out the summer sun and keep your energy bills down, consider making a DIY insulation panel for relativel...28 Jun 2022 ... Share your videos with friends, family, and the world.EcoBatt® Insulation. Engineered to offer thermal and acoustical properties customers trust. Made with our revolutionary ECOSE® technology and validated formaldehyde-free. It's certified to the toughest indoor air quality certification in the industry, GREENGUARD Gold. Get free shipping on qualified Insulation, R30 Insulation products or Buy Online Pick Up in Store today in the Building Materials Department. ... R-30 EcoBatt Kraft ... HANDIFOAM STRAW FOAM SEALANT 24 OZ (680G) (CASE) $92.55. The Owens Corning R-30 Foil Faced Batts with PureFiber Technology is flexible insulation designed to improve the thermal performance of wall and roof/ceiling assemblies. Foil Faced Insulation has an aluminum foil kraft facing on one side, with stapling flanges provided.

Owens Corning R-30 Unfaced Fiberglass Insulation Batts - All Sizes. FEATURES & BENEFITS. Sized for metal or wood framing. Can be stapled or friction-fit. Easy to handle and install. Trim and fabricate with a utility knife. Meets thermal specifications. Improves interior noise control.

Get free shipping on qualified Faced, R30 Insulation products or Buy Online Pick Up in Store today in the Building Materials Department.Insulation 12018-L ROCKWOOL Comfortbatt® is a semi-rigid batt insulation designed specifically for exterior wood and steel stud applications in residential and commercial construction. Made from natural stone and recycled slag, ROCKWOOL stone wool is a high-density insulation that will fit snugly into wall cavities and will not slump over time.An insulation’s R-value is vital for a home’s comfort and efficiency. Higher R-values resist heat flow better and reduce energy bills, so match R-values to your climate, using higher ones in colder regions. Do not skimp on insulation when building or renovating since long-term utility savings offset the up-front cost.Object moved to here.Thermafiber Fire and Sound Guard Plus mineral wool insulation is designed to provide excellent thermal, noise control and fire resistance in residential and light commercial construction applications. ... Ceiling Insulation, Floor. Insulation R-Value. R30. Insulation Type. Batt. Number of Pieces. 16. Pack Size. 4. Product Weight (lb.) 36.07 lb ...Rockwool Comfortbatt R15 (All Sizes) $1,315.66. Owens Corning R-38 Unfaced Fiberglass Insulation Batts - All Sizes. $322.95. Owens Corning R-19 Kraft Faced Fiberglass Insulation Batts - All Sizes. $267.83. Hunter Panels CAV-GRIP Adhesive Hose - All Sizes. $70.59. Recessed Light Cover Solid - All Sizes.R30. R13. R6.7. R15. Insulation Features. Formaldehyde Free. Friction Fit. Soundproofing Insulation. Vapor Retardant. Compatible Install Surface. Plywood. Existing Drywall. Wood. Concrete. ... R-19 EcoRoll Kraft Faced Fiberglass Insulation Roll 6-1/4 in. x 15 in. x 39.16 ft. (18-Rolls) Add to Cart. Compare. 1; 2; Showing 1-12 of 18 results. 0/0 ...Get free shipping on qualified Batt, Unfaced Fiberglass Insulation products or Buy Online Pick Up in Store today in the Building Materials Department. ... Standard R30 9-1/2 in. x 16 in. x 48 in. Unfaced Batt - Fiberglass Insulation 53.33 sq. ft. … Shop Johns Manville ComfortTherm R- 30 Attic 88-sq ft Encapsulated Fiberglass Batt Insulation (24-in W x 48-in L) 4-bag Multi-pack 44 total at Lowe's.com. Johns Manville Formaldehyde-free ComfortTherm poly-encapsulated thermal and acoustical fiberglass insulation is lightweight and wrapped in plastic for a more Owens Corning R-13 Kraft Faced Fiberglass Insulation Batts - All Sizes. $372.59. Owens Corning R-30 Unfaced Fiberglass Insulation Batts - All Sizes. $370.58. Owens Corning R-38 Unfaced Fiberglass Insulation Batts - All Sizes. $322.95. Owens Corning R-21 Un-Faced Fiberglass Insulation Batts - All Sizes. $409.92.

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Nov 30, 2023 · An insulation’s R-value is vital for a home’s comfort and efficiency. Higher R-values resist heat flow better and reduce energy bills, so match R-values to your climate, using higher ones in colder regions. Do not skimp on insulation when building or renovating since long-term utility savings offset the up-front cost. Owens Corning® FOAMULAR® & FOAMULAR® NGX® 250 Extruded Polystyrene (XPS) Rigid Foam Insulation is a closed cell, highly moisture-resistant foam board well suited to meet the insulation needs for a wide variety of residential and commercial building applications. Download Data Sheet.R-value is known as thermal resistance; R stands for Resistance. It is a numerical expression of how good an insulator of certain building material is. You can check types of insulations with typical R-values here for reference. The higher the R-value of a material, the better insulator it is. Example: R-30 material is 3 times better insulator ...R30 Fibreglass Batt Insulation Thickness. The typical R30 batt insulation thickness is 8.25 inches. But you may need 10 inches of it to compensate for a fair amount of compression during handling and …Owens Corning R-30 Unfaced Fiberglass Insulation Batts - All Sizes. FEATURES & BENEFITS. Sized for metal or wood framing. Can be stapled or friction-fit. Easy to handle and install. Trim and fabricate with a utility knife. Meets thermal specifications. Improves interior noise control.10 Jul 2022 ... Share your videos with friends, family, and the world. Blown-in Insulation/Loose Fill. Blown-in or loose fill insulation is usually made of fibreglass or cellulose (recycled paper fibre). It’s blown or sprayed into place with a machine and is ideal for use in hard-to-reach areas, such as attics. It can also be used to fill wall cavities or to top up existing insulation. R-30 faced insulation roll, 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 noise ….

In the United States, the walls of homes are typically either framed with 2X4’s or 2X6’s. A wall made with 2X4’s will have room for a maximum 3.5” of insulation and a 2X6 wall will have room for 5.5” of insulation. In those constrained cavities the choices for R-Value are: 2X4 Wall Frame R13 – R15. 2X6 Wall Frame R19 – R21.Sized for Proper Ventilation. R-30C EcoTouch® Thermal Batt insulation is designed to eliminate. R-value loss caused by compressing standard R-30 products in 2x10 cathedral ceiling construction. 81⁄4 ” thick, R-30C EcoTouch® Thermal Batt insulation prevents moisture damage and helps assure long roof life by providing 1" of ventilation air ...Knauf EcoBatt Fiberglass Insulation Batts with ECOSE Technology are a flexible glass mineral wool batt insulation made from sand and over 50% recycled glass bottles bonded with ECOSE Technology. Fiberglass insulation is the most cost effective way to increase thermal performance. ... Rockwool Comfortbatt R30 (All Sizes) from $0.00 Search By ...The panels provide a continuous energy-efficient surface. This eliminates thermal bridging, which is the energy lost through wall studs. The studs conduct more heat than the insulation between them. Insulating boards are just one of the many types of foam insulation. Consider using spray foam insulation as well to seal smaller cracks and gaps.Get free shipping on qualified R30, Batt Fiberglass Insulation products or Buy Online Pick Up in Store today in the Building Materials Department.Get free shipping on qualified Roll Fiberglass Insulation products or Buy Online Pick Up in Store today in the Building Materials Department. ... R30. R13. R6.7. R15. Faced or Unfaced. Faced. Unfaced. Roll or Batt. Batt. Roll. Insulation Location. Ceiling Insulation. Attic. 2x4 Wall. 2x6 Wall. Between Walls. Exterior Wall.3 Oct 2023 ... I need to redo insulation between the basement and first floor. Basement is unconditioned, but finished. We will occasionally (say 5% of the ...6 May 2024 ... 1. Excellent Thermal Performance: R30 insulation provides exceptional thermal resistance, helping to reduce energy consumption and maintain a ...Owens Corning FOAMULAR 250 XPS Insulation Board - All Sizes. $35.38. Owens Corning. Owens Corning FOAMULAR NGX 250 4ft x 8ft Insulation Board. $52.55. Call to inquire. Owens Corning. Owens Corning FOAMULAR InsulPink-Z (XPS) Insulation Board - All Sizes. $32.11.Owens Corning Blown In insulation is a DIY-friendly option best for adding insulation in an attic and can be installed on top of existing insulation in less than 1.5 hours Shop precut 2x6 wall & floor insulation for faster installation Insulation r30, Knauf R-30 EcoRoll unfaced 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-30 faced fiberglass insulation pre-cut for ceilings & attics; Provides temp. control, sound absorption and moisture mitigation; Natural colors, eco-friendly formaldehyde-free, recycled content , 10 Jul 2022 ... Share your videos with friends, family, and the world., Shop CertainTeed InsulPure R-30 Attic 58.67-sq ft Unfaced Fiberglass Batt Insulation in the Batt Insulation department at Lowe's.com. High performance InsulPure™ fiberglass insulation is specially formulated to never settle, accumulate moisture, or lose its R-value over time. Designed , For optimal energy efficiency, your home should be properly insulated from the roof down to its foundation. The illustration above shows all the areas of the home where there should be insulation. The numbered areas shown in the illustration are as follows: 1. In unfinished attic spaces, insulate between and over the floor joists to seal off ..., The Owens Corning R-30 Foil Faced Batts with PureFiber Technology is flexible insulation designed to improve the thermal performance of wall and roof/ceiling assemblies. Foil …, Definition of R30 Insulation. R30 insulation refers to a specific type of insulation material that has a thermal resistance, or R-value, of 30. The R-value is a measure of an insulation material’s ability to resist heat flow. A higher R-value indicates better insulation performance., Covers 88 sq.ft. ( $1.69 /sq.ft.) $149.00. Buy 15 or more $126.65. Pay $124.00 after $25 OFF your total qualifying purchase upon opening a new card. Apply for a Home Depot Consumer Card. R-30 faced insulation, easy attic and floor install. Stiffer batts slide in and stay put for fast install. Shed-resistant, for less dust and easier cleanup., R- 30 Unfaced Fiberglass Insulation Roll 15 in. x 25 ft. (1 Roll) Shop this Collection. Pickup. 167 nearby at North Avenue | 3.3 mi away. Delivery. Scheduled. Add to Cart. Compare., Owens Corning® FOAMULAR® & FOAMULAR® NGX® 250 Extruded Polystyrene (XPS) Rigid Foam Insulation is a closed cell, highly moisture-resistant foam board well suited to meet the insulation needs for a wide variety of residential and commercial building applications. Download Data Sheet., Insulation. Uninsulated. Floor. Uninsulated. Wood-Frame Wall. Insulated. Wood-Frame Wall. 1. R30 to R49. R25 to R30. R13. *. N/A. 2. R30 to R60. R25 to R38 R13 ..., Typically, the insulation thickness differs across material types. For example, R30 insulation has a thickness of 10.9 inches in blow-in rock wool but only 7.5 to 8.33 inches in foam board insulation. The thickness is even lower if you get closed-cell spray foam insulation, at just 4.25 to 6 inches. You could get the same or more with R19 ..., Knauf R-30 EcoRoll unfaced fiberglass insulation with ECOSE Technology is a leading sustainable insulation. All of our rolls are bonded with the revolutionary, industry-transforming, plant-based ECOSE , 8 Apr 2011 ... Herman Woodworks•67K views · 7:22 · Go to channel · Getting R-30 in an attic suite with 2x6 ceiling rafters. DIY Dave•1.4M views · 19:59 ..., The formula is: Total insulation needed (in cubic feet) = Attic square footage (in square feet) * Desired R-value (in inches) For example, if your attic is 1,000 square feet and you want an R-value of R30: Total insulation needed = 1,000 sq ft * 30/12 inches = 2,500 cubic feet. How many square feet does one bag of blown-in insulation …, Get free shipping on qualified R30, 10 in Fiberglass Insulation products or Buy Online Pick Up in Store today in the Building Materials Department. , Shop ROCKWOOL COMFORTBATT R-30 Attic Wall 29.9-sq ft Unfaced Stone Wool Batt Insulation 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., The higher the R-Value, the greater the insulation performance. R-Value is calculating using the following formula: R = thickness of material in metres ÷ thermal conductivity in W/mK. Example: A 0.22m thick insulation slab with a thermal conductivity of λ=1.2W/mK has an R-Value of 0.18 m 2 K/W. Structures such as walls, roofs, and floors tend ... , Typically, the insulation thickness differs across material types. For example, R30 insulation has a thickness of 10.9 inches in blow-in rock wool but only 7.5 to 8.33 inches in foam board insulation. The thickness is even lower if you get closed-cell spray foam insulation, at just 4.25 to 6 inches. You could get the same or more with R19 ..., 14 Nov 2018 ... Better than spray foam (thermal break and relatively consistent R-30+). Here's how to use 3 layers of 2 ... insulation inspection. My other ..., R19 insulation has an R-value of approximately 19, while R30 insulation has an R-value of approximately 30. Therefore, R30 insulation provides better thermal resistance compared to R19 insulation. This means that R30 insulation can help to better regulate the temperature in your attic by reducing heat transfer in both hot and cold weather., Additionally, we will look at how thick rigid insulation we need to achieve R10, R20, R30, and R49 insulation value (Chart 5). Note: Rigid insulation boards are commonly manufactured in 2×4, 4×4, and 4×8 board sizes. Nonlaminated boards have thicknesses of 0.5, 0.75, and 1 inches. Laminated boards have thicknesses of 0.5, 1, and 2 inches., , Fiberglass batt insulation for use in wood-framed attics, ceiling, basements and floors. Unfaced fiberglass batts do not have a vapor barrier and can be added to existing insulation. Improves energy efficiency and provides sound control. Batts are pre-cut in standard 4-ft length for use with 16-in on-center joist spacing. press in place between ..., 9 Feb 2018 ... R-30 (4.3 Min. Thickness) Closed Cell Spray Foam installed between 2x6 Roof Rafters In Santa Barbara, CA., Shop ROCKWOOL COMFORTBATT R-30 Attic Wall 29.9-sq ft Unfaced Stone Wool Batt Insulation in the Batt Insulation department at Lowe's.com. ROCKWOOL COMFORTBATT is a stone wool insulation …, Cavity insulation R-value is 3.7 per inch. Space Between Total Insul. R-values [ft2hr°F/Btu] 2x4 Walls. Depth. Nominal Whole-Wall. 1 in. 2 in. 3 in. 5 in. 8 in 30. 9 in 33. 10 in 37. 12 …, R-30 unfaced 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 noise , R-value is known as thermal resistance; R stands for Resistance. It is a numerical expression of how good an insulator of certain building material is. You can check types of insulations with typical R-values here for reference. The higher the R-value of a material, the better insulator it is. Example: R-30 material is 3 times better insulator ..., Kim asks, "On your show you said that when insulating under a floor, the paper facing should face up against the flooring. Why can't I install it the other way?Regardless of whethe..., Get free shipping on qualified Batt, Unfaced Fiberglass Insulation products or Buy Online Pick Up in Store today in the Building Materials Department. ... Standard R30 9-1/2 in. x 16 in. x 48 in. Unfaced Batt - Fiberglass Insulation 53.33 sq. ft. …, When thinking about insulation, the key metric you have to think about is the insulation R-value. ... (Central Texas), and Zone 4 (North Texas). For Zones 2 and 3, the recommended total attic R insulation value ranges from R30 to R60. In Zone 4, you should go for R38 to R60. Hope this helps. Reply. Nick McIntosh. 26th June 2023 at 6:18 pm, The R-value of spray foam insulation ranges from 3.5 to 7 per inch thickness. For open-cell spray foam the R-value is approximately 3.5 whereas for closed-cell spray foam it is 6. Spray foam insulation thickness. The thickness required for spray form insulation when insulating, for eg; an attic, depends on the R-value required for …