Douglas fir is the first choice for residential contractors everywhere. Because of its stiffness, this wood is perfect for framing and is ideal for withstanding earthquakes. In fact, Douglas fir is so reliable and durable that it is used for the construction of homes, commercial buildings, furniture, boats and even some aircrafts! ...DFL, SPFs/SPF, WW, #2, KD/HT. 2x4, 2x6, PET, 925⁄8, 1045⁄8, 1165⁄8. DOUGLAS FIR is a straight grained and resilient timber with high strength to weight ratio as well as quick availability and ease of use. Its light rosy color is set off by a remarkably straight grain pattern making it a premium building product specified by architects ...2X4-8′ Douglas Fir, Select Kiln dried . Reviews. There are no reviews yet. Only logged in customers who have purchased this product may leave a review. Related products. Sale! 1×5 1/2″ 4′ and 5′ Rustic Grade Fence Boards $ 0.75 - $ 1.50 Select options; 4X4 Western Red Cedar Posts - APPEARANCE SMOOTHPressure-treated wood, borate wood preservatives, and fire retardant treatments are the three most common treatments used for Douglas Fir. Pressure treatment involves forcing preservatives into the wood under high pressure, making it highly resistant to decay, insects, and fungi.Studs come in several widths for structural framing such as 2 in. x 6 in. and 2 in. x 4 in. for structural walls and exterior walls. 2 in. x 3 in., 2 in. x 4 in. and 2 in. x 6 in. can be used for interior walls. These framing studs can also be used in exterior applications as long as it is properly primed and painted or sealed and stained.Ashby Lumber. 2295 Arnold Industrial Way, Concord CA. Phone: (925) 689-8999. Shop our selection of 2x4 DOUG FIR STANDARD STUD online at Ashby Lumber with fast delivery. Browse high-quality 2x4 DOUG FIR STANDARD STUD at great prices.Safe loads for wood columns. Safe loads for Wood Columns - No.1 grade Douglas fir-larch: a kip is a non-SI unit of force - it equals 1,000 pounds-force. 1 kip = 4448 Newtons (N) = 4.45 kilo Newtons (kN) = 453 kgf.We carry a broad selection of pressure treated Douglas Fir lumber ranging in length from 8' - 20' (evens only). All of our PT is treated for ground contact and most sizes are available in "Brown" rather than green. Sizes Available: 2x4, 2x6, 2x8, 2x10, 2x12. 3x4, 3x6, 3x8. 4x4, 4x6, 4x8, 4x10. 6x6, 6x8, 6x10, 6x12Weights of green, kiln dried and pressure treated lumber boards. The density and weight of lumber varies with the water or moisture content in the wood. Typical weights for green, kiln dried and pressure treated lumber boards are indicated in the tables below. Note that nominal dimensions are not the same as actual lumber dimensions.It only needs to get to 19% EMC to prevent the growth of mold. (19% is by no means completely dry. It will eventually get down to 9% or so, shrinking all the while. But it won't be growing mold.) As it happens, getting from green to 19% is the easy part of the drying process; water between the cells is coming out.These studs can also be used in exterior applications as long as they are properly primed and painted or sealed. Precut stud (common: 2-in x 4-in x 120-in; actual: 1.5-in x 3.5-in x 120-in) #2 Grade Douglas Fir for increased strength. Kiln dried reduces shrinking, cracking and warping. Minimal wane for a better nailing edge.2-in x 4-in 2-in x 6-in 2-in x 10-in 2-in x 8-in 2-in x 12-in 4-in x 10-in 4-in x 12-in 4-in x 4-in 4-in x 6-in 4-in x 8-in 6-in x 6-in 8-ft 10-ft 12-ft 16-ft 14-ft 18-ft 20-ft 22-ft 24-ft 28-ft Cedar Pine Southern yellow pine Redwood Douglas fir Spruce pine fir Fir Hemlock fir Whitewood Poplar Decking Furniture & Cabinets Framing Fencing Shelving Floors & Ceilings …Dricon® 2x4 · Fire Retardant Douglas Fir · #2 & Better · S4S. Quick Specs Ships via Dunn Lumber. Dricon 2x4-RL S4S. In stock. Grouped product items. Product Name. Qty. Dricon® 2x4-8' · Fire Retardant Douglas Fir · Std & Better · S4S. $1.28.For example, an exterior deck that is supporting a dead load (weight of materials and structures) of 10 pounds per square foot or less, a 2×12 could span up to 15 feet 6 inches when using untreated Douglas Fir-Larch #2 or better grade lumber. If the deck is supporting heavier loads, the span will be less.Overview. Resources provide a simplified system to determine allowable joist and rafter spans in one- and two-family dwellings, and the companion supplements for tabulating allowable bending and modulus of elasticity design values for visually graded and mechanically graded dimension lumber. These resources are referenced in the International ...2X4 14' Douglas Fir Standard And Better Surfaced On Four Sides from Close Lumber and Corning Lumber. Shop online and your local store for all your building materials, lumber, hardware, tools, and more. Shipping available for online orders. Local delivery available, contact local store. Store locations in Sutter, Yuba City, Williams, Willows, Corning, and Orland in California.Douglas-fir is a strong and durable . species. Using our proprietary drying processes, we dry Douglas-fir lumber in state-of-the-art kilns while maintaining the strength, straightness and ... sizes 2x4, 2x6, 2x8, 2x10 and 2x12. WARNING: This product can expose you to chemicals .You can stain Douglas Fir Wood. Sand the wood with 100-grit sandpaper, then apply Minwax Clear Pre-Stain Wood Conditioner, wait for it to dry and apply 2-3 thin coats of gel stain. Finally, apply a clear polyurethane finish as a protective layer. More of the information that will be given about staining douglas fir wood is the best wood stain ...Every piece of 2 in. x 4 in. x 92-1/4 in. Premium #2 and Better Fir Lumber meets high grading standards for strength and appearance. Being easy to cut, fasten and paint, makes this the best choice for many building projects. This product is third-party certified, signifying sourcing from renewable and environmentally managed forests.Item # 432481 |. Model # WF204TOPCHC12. 100+ bought last week. Get Pricing & Availability. Use Current Location. Common: 2-in x 4-in x 12-ft; Actual: 1.5-in x 3.5-in x 12-ft. Tight grain lumber with small knots that is resistant to cupping, twisting, and bowing. High quality lumber from the Inland Northwest region in North America.As of 2015, a 2-by-4-by-10 ft piece of Top Choice #2 pressure treated lumber costs about $6 according to the Lowes website. A 2-by-4-by-10 ft piece of #2 dimensional kiln-dried Dou...On the other hand, 2"×10" wood beams from stiffer woods like the Douglas Fir Larch can span up to 7.3 feet. What is the modulus of elasticity of oak wood? Oak wood has a modulus of elasticity of around 800,000 to 1,400,000 pounds per square inch (or psi).Red Spruce, Longleaf Pine and Douglas Fir - moisture content and their compressive strength. Wood - Density vs. Moisture Content The density of wood versus moisture content. Wood Columns - Safe Loads Safe loads for wood columns. Wood Headers - Max. Supported Weight Weight supported by a double or triple wood headers. Wood Screws - Withdrawal ForceGrown in the Pacific Northwest, Premium Green Douglas-fir is a product that's ideal for structural framing in residential applications. Our proprietary grade ...Douglas fir 2x4"s x10'been air dried for about 8 months. $6.00 each. post id: 7731291657. posted: about a month ago. updated: 9 days ago. ♥ best of [?]Bonkers1503. 1 post · Joined 2021. #14 · Feb 24, 2021. Douglas fur is great for any hidden wood like the studs in your house or even the framing on a shed or outhouse but the wood that is used at floor level and below as well as the outside exposed posts. Adding a finish to any wood will help but it's also like putting paint and finish on ...2X4 116-1/4" Douglas Fir Standard And Better Surfaced On Four Sides from Close Lumber and Corning Lumber. Shop online and your local store for all your building materials, lumber, hardware, tools, and more. Shipping available for online orders. Local delivery available, contact local store. Store locations in Sutter, Yuba City, Williams, Willows, Corning, and Orland in California.2x4 Douglas Fir Clear Vertical Grain S4S Kiln-Dried / Dimensional Lumber . Please see our best quality 2x4 Douglas Fir, Clear Vertical Grain, S4S Kiln-Dried,Dimensional Lumber products and douglas fir lumber selections. Submit an order, visit or Contact us for more info. 2x4 ; S4S (Surfaces on 4 Sides) Kiln-Dried (KD) Dimensional Lumber2-in x 4-in x 8-ft Douglas Fir Kiln-dried Lumber. Find My Store. for pricing and availability. 127. Actual Dimensions: 1.5-in x 3.5-in x 8.0-ft. Wood Species: Douglas fir. Dressing: S4S. Drying Method: Kiln-dried.Manufactured from Douglas-fir and Larch, both are a dimensionally stable product known for their strength and excellent nail-holding capabilities; Precision-graded for consistent appearance and minimal waste; Good appearance with minimal wane and warp for a bright and clean look; 1.5 in. x 3.5 in. x 12 ft.About This Product. This 4 in. x 4 in. x 8 ft. fir dimensional lumber has high structural strength. This 4 in. x 4 in. can be used for both for both commercial and residential applications, which would include framing of houses, barns, sheds and other commercial construction. The 4 in. x 4 in. can also be used to construction furniture and used ...Framing studs are ideal for a wide range of uses from framing of houses to basic interior structural applications. Studs come in several widths for structural framing such as 2 in. x 6 in. and 2 in. x 4 in. for structural walls and exterior walls. 2 in. x 3 in., 2 in. x 4 in., and 2 in. x 6 in. can be used for interior walls.It only needs to get to 19% EMC to prevent the growth of mold. (19% is by no means completely dry. It will eventually get down to 9% or so, shrinking all the while. But it won't be growing mold.) As it happens, getting from green to 19% is the easy part of the drying process; water between the cells is coming out.10′ 2×6 $10. 10′ 2×8 $12. This lumber is true dimension minus saw kerf and shrinkage. Most of the lumber you buy in stores is planed down to smaller than the stated dimensions. For example, a 2×4 is more like 1.5-in x 3.5. Rough cut lumber is typically closer to the actual dimensions. In my case you can subtract 1/6-1/8 inch for saw kerf.2X4 116-1/4" Douglas Fir Standard And Better Surfaced On Four Sides from Close Lumber and Corning Lumber. Shop online and your local store for all your building materials, lumber, hardware, tools, and more. Shipping available for online orders. Local delivery available, contact local store. Store locations in Sutter, Yuba City, Williams, Willows, Corning, and Orland in California.Civil Engineering questions and answers. What is the reference tension stress, Ft, for a 2x4 Douglas Fir-Larch (DF-L) No. 2 member? (units=psi). Use Table 4A from the NDS Supplement (National Design specification supplement). A. 575 B. 325 C. 900 D. 525 I am getting the answer as 500 for some reason and that isn't an option.Read all about Charlotte Douglas International Airport (CLT) here as TPG brings you all related news, deals, reviews and more. Charlotte-Douglas International Airport is American A...Product Details. About This Product. Every piece of 2 in. x 4 in. x 20 ft. Premium Standard and Better Fir Lumber meets high grading standards for strength and appearance, and is …2022 Pricelist - Timbers. * All prices subject to change without notice ** Other wood species available please call for pricing - (519) 682-0910 RGH (Rough Sawn / Re Sawn) D4S (Smooth Four Sides) #1 BTR DOUGLAS FIR - PER LINEAL FOOT PRICING. TIMBERS - DOUGLAS FIR. 2x4 2x4 2x6 2x6 2X8 2X8 2X10 2X10 2X12 2X12. RGH D4S RGH D4S RGH D4S RGH D4S RGH D4S.Wood Species - Densities. Densities of seasoned & dry wood are indicated in the table below: After felling, timber will lose moisture to align itself with the atmospheric conditions. Moisture content should be lower than 20% to stop fungal attack. Seasoning is the name of the process where moisture content is reduced to the appropriate level ...Every piece meets the highest grading standards for strength and appearance. Pound for pound, Fir is one of the strongest western soft woods. This wood is used in the manufacturing of more products than any other lumber species. This strong, reliable and workable wood is perfect for use in any construction or hobby driven projects.Durability. Douglas Fir is known for its exceptional durability. It is a highly resistant wood that can withstand various environmental conditions, making it suitable for both indoor and outdoor applications. The wood is naturally resistant to decay, rot, and insect infestation, ensuring its longevity.Depending on various factors, a 2×4 floor or deck joist can span a maximum of 6' 7" at 16" spacing or 7'11" at 12" spacing. A 2×4 ceiling joist with 16" spacing has a max span of 7' 3" and with 24" spacing, the max span is 6" 4". In this article, you will learn about the span and the variables that can affect the ...Manufactured from solid douglas fir for strength; Can be painted; Pressure-treated to resist decay; Ideal for residential and commercial projects; Incised for better chemical adherence; Click to …Every piece of 2 in. x 4 in. x 14 ft. Premium Standard and Better Fir Lumber meets high grading standards for strength and appearance, and is easy to cut, fasten and paint, making this the best choice for many building projects. This product is third-party certified, signifying sourcing from renewable and environmentally managed forests.A dimensionally stable product known for its strength and excellent nail-holding capabilities. Precision-graded for consistent appearance and minimal waste. A square …Bulk Savings. $4.36/ Each (10.0% Off) when you buy 100+. Common: 2-in x 4-in x 8-ft; actual: 1.5-in x 3.5-in x 8-ft. Top Choice is Lowe's exclusive mark of quality lumber due to the fact that it is hand selected to be square straight solid and strong. Framing studs are ideal for a wide range of uses from framing of houses to basic interior ...Douglas Fir, Ponderosa Pine, White Fir and Western Red Cedar are the most common single species sold as dimension lumber products. Structural lumber (including dimension lumber) is visually and/or mechanically (MSR) graded for its strength and physical working properties (appearance is secondary, unless specified). Basic end-use classifications ...A simply supported 14 ft. long 4x12 Douglas fir-larch No. 1 joist with a uniformly distributed load of 500 lb/ft is supported by the top plate of a 2x8 wall. What is the bearing stress at the support? a. f bearing = 55 lb/in 2. b. f bearing = 69 lb/in 2. c. f bearing = 138 lb/in 2. d. f bearing = 110 lb/in 2. There are 2 steps to solve this one.Western Wood Products Association 2 Centerpointe Drive, STE 360 Lake Oswego, OR 97035 Phone: 503-224-3930 Fax: 503-224-3935 Email: [email protected] Fir outperforms other softwoods such as Hem-Fir, Western Hemlock, and true firs such as Noble, Grand, Pacific Silver and White and that is why we choose to supply it to our customers! Dimensions: 2x4, 2x6, 2x8, 2x10, 2x12, 4x4, 4x6, 4x8, 4x10, 4x12, 6x6, 6x8, 6x10, 6x12; 2x material is kiln-dried for added stability!Don't miss out on the opportunity to work with the finest Douglas Fir Select Structural grade lumber. Contact us now at [email protected] or call us at (800) 597-7191 to discuss your project and discover how we can assist you. Get A Free Lumber Quote Here.Grown in the Pacific Northwest, Premium Green Douglas-fir is a product that's ideal for structural framing in residential applications. Our proprietary grade specifications and precision manufacturing consistently deliver the unique features you demand: Attractive, square-edge appearance with minimal wane. High strength and stiffness, while ...Pine is an affordable and readily available wood type, making it a popular choice for fencing. Unlike Douglas Fir, pine is not as long-lasting or decay-resistant. It's important to select quality lumber when building a pine fence and regularly inspect it for signs of splinters, cracks, and rot.2x4 #1 Structural Douglas Fir S4S KD. SKU: 248DF1. Select an option. 2x4 #1 Structural Douglas Fir S4S KD. $8.43 /piece. Add To Cart. Concord. In Stock. 2295 Arnold Industrial Way, Concord, CA. SAFE & SECURE CHECKOUT. Related Products. 1" x 8" Con Heart Rough2x6 Douglas Fir Tongue and Groove Decking Product Specifications: • Width: 5". • Thickness: 1 1/2". • Grade: WWPA Select Structural Grade. • Available Lengths: 12', 14', and 16' lengths are available. Please let us know if you need a specific piece count. • Cutting Waste: We recommend allowing approximately 5%-10% cutting ...Spruce-Pine-Fir Lumber Sales Vancouver, BC Tel: 604-264-6241 Email: [email protected] International Sales Inquiries: [email protected]: 2-in x 4-in x 16-ft; Actual: 1.5-in x 3.5-in x 16-ft Top Choice Lumber. Recommended for a wide range of construction and project applications including framing, houses, barns, sheds, furniture and hobbies. Prime lumber with fewer, smaller knots and little to no wane. Strong, reliable, workable wood is surfaced 4 sides and perfect for ...Any Douglas Fir timber quantity inquiry welcome, pieces, units, truck loads or car loads. We inventory virtually all Douglas Fir timber sizes that are SFI Certified Green Building Products from: 3x4 through 3x14 4x4 through 4x16 6x6 through 6x16 8x8 through 8x16 10x10 thgough 10x16 12x12Multiple Sizes Available. Severe Weather. 2-in x 4-in #2 Prime Southern Yellow Pine Pressure Treated Lumber. Shop the Collection. 16154. Common Measurement: 2-in x 4-in. Contact Type: Above-ground. Lumber Grade: #2 Prime. Drying Method: Kiln-dried.Douglas Fir timbers up to 40-foot lengths Southern Pine timbers up to 26-foot lengths Oak timbers up to 20-foot lengths Good selection of Cyprus in 4/4 through 16/4 in select grades ... 2x4, 2x6, 2x8, 2x10, 2x12 and wider 6x6 8x8 : Douglas Fir, kiln dried : Standard and Better All timbers come up to 40 feet long.2-in x 4-in 2-in x 6-in 2-in x 10-in 2-in x 8-in 2-in x 12-in 4-in x 10-in 4-in x 12-in 4-in x 4-in 4-in x 6-in 4-in x 8-in 6-in x 6-in 8-ft 10-ft 12-ft 16-ft 14-ft 18-ft 20-ft 22-ft 24-ft 28-ft Cedar Pine Southern yellow pine Redwood Douglas fir Spruce pine fir Fir Hemlock fir Whitewood Poplar Decking Furniture & Cabinets Framing Fencing Shelving Floors & Ceilings …Average Young's modulus values of wood along the longitudinal axis (E L) obtained from bending tests are given in the following table. Average coefficients of variation of E L is 22% based on results of bending tests of clear & green wood from approximately 50 species. Values for wood adjusted to 12% moisture content may be assumed to be ...High quality Douglas Fir selected for appearance; 4 square edges; Surfaced 4 sides; Ratings & Reviews. No reviews available. Be the first to Write a Review. Customers who bought this item also bought. Husky 42 Gallon 3 mil Heavy Duty Contractor Clean-Up Trash Bags, 20 Count. $19.99 .PSL (East) 750 Douglas Fir plate* 625 1.3E TimberStrand ® LSL 710 Spruce -Pine -Fir (S -P -F) plate* 425 1.5E TimberStrand ® LSL 860 Hemlock Fir plate* 405 1.55E TimberStrand ® LSL 900 StrandGuard ... 5¼" x 14" Parallam® PSL (West) on a 2x4 Hem-Fir plate . Beam reaction = 6,500 pounds .Mfg.# 2X4 104-5/8 Sku# 3782596 Sutherlands 8 x 8-Inch X 14-Foot #1 S4s Douglas Fir Mfg.# 8X 8 14 Sku# 2082295 Sutherlands 2 x 4-Inch X 18-Foot #2 Kiln-Dried S4s Southern Yellow Pine Lumber Mfg.# 2X4 18 Sku# 39339 Sutherlands 2 x 6-Inch X 22-Foot #2 Better S4s Green Douglas Fir ...Dricon® 2x4 · Fire Retardant Douglas Fir · #2 & Better · S4S. Quick Specs Ships via Dunn Lumber. Dricon 2x4-RL S4S. In stock. Grouped product items. Product Name. Qty. Dricon® 2x4-8' · Fire Retardant Douglas Fir · Std & Better · S4S. $1.28.Pound for pound, Fir is one of the strongest western soft woods. This wood is used in the manufacturing of more products than ... 2 in. x 4 in. x 16 ft. #2 and Btr Douglas Fir S4S Dimensional Lumber. ... 2x4. Nominal Product Length (ft.) 16 ft. Nominal Product Thickness (in.) 2 in. Nominal Product Width (in.) 4 in. Details. Fastener Recommendation.Issue11-2008.pdf. GIRDER SPANS AND HEADER SPANS FOR EXTERIOR BEARING WALLS. (Maximum spans for Douglas fir-larch, hem-fir, southern pine and spruce-pine-fir and required number of jack studs) Girders and Headers Supporting. Size.Model Number: 1141042 Menards ® SKU: 1141042. PRICE $20.49. 11% REBATE* $2.25. PRICE AFTER REBATE* $ 18 24. each. ADD TO CART.Feb 21, 2023 ... They are expensive, very heavy, and very hard to nail or screw into. They are stronger than SPF studs, but that's not a factor in your ...Superior Strength and Reliability: Douglas Fir Select Structural grade lumber is known for its exceptional strength and reliability. It is carefully selected and graded to meet the …Depending on various factors, a 2×4 floor or deck joist can span a maximum of 6' 7" at 16" spacing or 7'11" at 12" spacing. A 2×4 ceiling joist with 16" spacing has a max span of 7' 3" and with 24" spacing, the max span is 6" 4". In this article, you will learn about the span and the variables that can affect the ...Vertical Grain Fir lumber: Even, straight, vertical grain that stains out beautifully. Reddish in color. Popular stain grade softwood found in most vintage homes in Portland. 1/2x sizes are true 1/2″ thickness, S4S, square edge, in the following nominal sizes: LF1/2X4 (actual 1/2″ x 3-1/2″) LF1/2X6 (actual 1/2″ x 5-1/2″) 1x sizes are ...As a result, Douglas fir bed slats are usually easy to find and relatively inexpensive. They are also quite solid and durable, making for a sturdy, hard-to-damage bed frame. Yellow Pine. Yellow pinewood is an excellent wood that makes for sturdy, durable bed slats. It has a firm grain and can bear large amounts of weight, making it well suited ...2X4 14' Douglas Fir Standard And Better Surfaced On Four Sides from Close Lumber and Corning Lumber. Shop online and your local store for all your building materials, lumber, hardware, tools, and more. Shipping available for online orders. Local delivery available, contact local store.Douglas Fir. Since the Douglas fir is rigid and sturdy, it can be used for a variety of purposes. including masts, in wooden boatbuilding. The majority of Douglas fir available for purchase is for building and framing. It works okay enough for construction purposes. But using it for making benches or other utilities is a big no. Factor 3.Overview. Resources provide a simplified system to determine allowable joist and rafter spans in one- and two-family dwellings, and the companion supplements for tabulating allowable bending and modulus of elasticity design values for visually graded and mechanically graded dimension lumber. These resources are referenced in the International ...FlamePRO Fire Retardant pressure treated wood products, as described in the ICC Evaluation Services, Inc. ESR-4244, meet all major model building code requirements. UL Classified with an FR-S Rating for flame spread and smoke development values of 25 or less. FlamePro Fire Retardant pressure treated wood products comply with AWPA UC-1 and UCFA ...Depending on various factors, a 2×4 floor or deck joist can span a maximum of 6' 7" at 16" spacing or 7'11" at 12" spacing. A 2×4 ceiling joist with 16" spacing has a max span of 7' 3" and with 24" spacing, the max span is 6" 4". In this article, you will learn about the span and the variables that can affect the ...Square edges. Resawn 4 Sides: Rough finish. Send us your material list for pricing. [email protected]. FOHC- S4S : 3x4 to 3x12. 4x4 to 4x14. 6x6 to 6x16. 8x8 to 8x16. 10x10 to 10x12.Common: 2-in x 4-in x 14-ft; Actual: 1.5-in x 3.5-in x 14-ft. Tight grain lumber with small knots that is resistant to cupping, twisting, and bowing. High quality lumber from the Inland Northwest region in North America. THIS ITEM IS CURRENTLY UNAVAILABLE. Please check later - it'll be ready for purchase again soon. Join. Earn. Save. Learn More.. Apr 17, 2012 ... ... fir - depends on what the mill was 2 in. x 4 in. x 12 ft. #2 and Better Douglas Made of Douglas fir wood that sustains abrasion. Paint-friendly surface allows easy customization as needed. Used for framing of houses, sheds, and commercial construction. View More Details. Nominal Product Length (ft.): 16 ft. 8 ft. 10 ft. 12 ft. 16 ft.Although some lumber may be traditionally stocked in green or kiln dried, it's important to note just because it is stocked one way doesn't mean you can't order it specific to your job. Take Doug Fir beams for example. Normally stocked green, it can be ordered in kiln dried usually in a day or two. It all just depends on what you are planning ... Thicknesses: kiln dried are 1″, 1.5″, 2″, 2.5″, 3″ & 4″. Also 6″ The R-Value of Wood. The insulation value of wood varies depending on what type the wood is and how it has been treated. The R-value of softwoods ranges from 1.41 per inch for most softwoods to 0.71 for hardwoods. So, if you have an exterior wall made of 4-inch-thick wood, it might have an R-value somewhere in the range of 3 to 6. Find Douglas fir 2-in x 4-in dimensional...
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