The term CDX is basically not the name of the plywood grade, but the abbreviation of C-D Exposure 1 plywood. Some mistakenly think the "X" stands for "exterior"—which is not true, exactly. This type of plywood won’t sag when used on a 12 inches joist structure. This means that sections of logs are placed in a large lathe, which makes a continuous spiral cut, peeling off one long, continuous sheet of veneer, which is then later cut up for use. Browse our range of trade standard plywood boards such asStructural Hardwood Plywood, Shuttering Plywood or Selex Structural Plywood. This leaves the D side facing down, into the attic, where it will most likely be seen. Marine grade plywood also has better face veneers than CDX, which are sanded smooth. If you have decided to use CDX plywood for your next home building project then now you must be wondering about its size, thickness, and availability options. After screwed down on a 12"x12" grid and vinyl plank flooring over it the top layer of the If the thickness of plywood increase 3mm, the No. 1220 mm. However, the Universal Building Code states that it is acceptable to use 3/8â thick CDX plywood for sheathing. Then, once it has dried, sand it smooth, providing you with the surface you need for painting. C and D grade plywood veneers arenât smooth and donât have an attractive grain pattern, so they wouldnât be used for furniture or commercial fixtures where the grain is visible, unless the intent is to provide an industrial appearance. CDX plywood is much thicker and can be bought for low prices in large volumes. This resistance to weather and dimensional stability after exposure makes CDX a superior choice for roof and wall sheathing, as opposed to the more economical OSB (Oriented Strand Board). of Plies will increase 2 plies; 2. 4 foot. The end result is that it slows the spread of fire, although it cannot stop it. Plywood Prices - OSB, CDX, T&G costs for interior and exterior plywood panels, sheets. When referring to thickness, exterior grade plywood is nominally smaller than the referred to dimension e.g. This means that if they expand at all, due to water absorption, they will buckle in some manner. While this process does not produce attractive grain patterns, the larger veneer sheets make it much easier for construction plywood out of. The 1/8″ and 1/4″ plywood is used for making hard covered flats. Providing better information on softwood and hardwood. These different grades have different manufacturing tolerances and may vary more or less from the 3/4” nominal thickness. Specifications ; Specifications. CDX & Struct-1 available. Limited splits, discoloration or sanding defects that donât affect the plywoodâs strength. This introduces challenges when precision measurements are needed, such as when selecting a router bit or sizing a dado saw blade. CDX plywood sheets are also available in a fire retardant variant, though those sheets come with a much heftier price tag. For many years, the standard option was lauan plywood, also called Philippine mahogany or luan plywood, which is made with an inexpensive tropical hardwood, and therein lies its problem. If youâre in the middle of a project and winter sets inâ¦thatâs another matter altogether. An exterior grade pine plywood with a CD grade, sheathing grade. CDX plywood is manufactured, like other types of softwood plywood, of opposing layers of wood veneers, laid at right angles to each other and glued together with resinous glue. As the most common plywood product available on the market, CDX plywood is available in a number of thicknesses, ranging from 1/4 to 1-1/4 inch thick and also including 3/8, 1/2, 5/8 and 3/4 inch thicknesses, which are the most common sizes. As the most widely recognized plywood product on the market, CDX plywood is accessible in various thicknesses, going from 1/4 to 1-1/4 inch thick and furthermore including 3/8, 1/2 CDX plywood, 5/8, and 3/4 CDX plywood. EZwoodshop.com. This plywood is chemically treated with a fire retardant, making it less likely for the plywood to catch fire. While this may not be allowed by building inspectors in all jurisdictions, it is in many. Interior grade plywood, made using resins that canât withstand water and weather as well, are not considered to be structural grade plywood. 1/2″ plywood is used for building furniture parts, boxes and … OSB panels used as roofing sheathing exposed to rain or snow can give the subsequent shingles an unattractive wavy appearance, which is most obvious at the edges of the roof. ACX also on hand for telecommunications panels / phone-board. It is usually made from fir or pine, just like CDX. It is usually made from fir or pine, just like CDX. The plywood made of more plies is stronger than the plywood of same thickness but made of less plies. It still requires waterproofing, especially on the edges, to protect the end grain. Nominal Thickness. However, take note that these are nominal thicknesses. But in this case, the criteria isnât appearance, as it is utility. As the most common plywood product available on the market, CDX plywood is available in a number of thicknesses, ranging from 1/4 to 1-1/4 inch thick and also including 3/8, 1/2, 5/8 and 3/4 inch thicknesses, which are the most common sizes. Technical specification: Length. CDX plywood takes glues and adhesives well (better than OSB due to the waxes involved with OSB manufacturing) as well as fasteners. There are always an odd number of layers, balancing the sheet, to prevent warping of the panels. However, if vinyl floor covering is to be applied directly to the plywood, which is not recommended, fill any holes, knotholes and cracks. The nominal thicknesses of plywood range from 1/8 inch, or 3.2 mm, to 1 1/4 inches, which is equivalent to 31.75 mm. Lower cost engineered sheet wood products, such as OSB can much more easily be punctured in these applications, limiting the amount of protection they can provide to the goods stored inside. Weight. Plywood is generally available in 4’x8′ sheet and is cut into a square board. Plywood is a wood panel that is composed of several thin layers, or plys, of wood veneer. While the length and width are often the actual dimensions, the nominal thickness is usually different than the actual thickness. An odd number of glue layers would cause the glue to pull towards one direction, causing warping of the panel. Item # 271066 . If more flexible substrates are used as the subflooring, the extra bowing or flexing allowed by those substrates could lead to the separation of the adhesive mastic from the tile or cause the tile to crack. This support keeps the shelf from sagging. But thatâs four months of normal rainy weather, not four months of snow and ice buildup. Most plywood is graded based upon the finish of the exterior layers, specifically the amount and type of defects that are allowed in these layers. A more economical choice this plywood allows for knots and other imperfections on both faces. Learn more about plywood weight for different types, including softwood, hardwood, marine-grade, OSB, MDF, MDO, and particle board. The letter "X" in CDX refers to the type of glue used in the factory to bond the plywood veneers. Formation. When making a selection below to narrow your results down, each selection made will reload the page to display the desired results. They grow quicker than hardwoods, which have leaves that they lose every fall. Our plywood calculator can estimate the number of 4′ x 8′ sheets needed for a project. They may even be commonly referred to as plywood, despite being manufactured differently. This softwood plywood is the least expensive grade of multi-layered veneer plywood, manufactured in small factories around the country for local use, predominantly in construction. When we compare these two different softwoods, we find that fir has less soft grain than pine. 2440 mm. Calculate the size of a cabinet door based on the opening and generate a cut list of parts, including rail, stile, and panel dimensions. CDX is a great economical choice for construction grade plywood! The use of H-clips is a decision made by either the architect or the structural engineer. In most cases, 1âx 4â is enough, as it will support the weight to be put on the shelf. Therefore, the wood itself is not as dense as it is with hardwoods. Our board footage calculator can help calculate how many board feet you need if your plywood is sold using that measure. Softwood plywood, which includes CDX plywood, is either made of pine or fir. This is false. OSB panels delaminate and swell when exposed to the elements and donât go back to their original shape after it dries. 5. It’s not just plywood, other types of lumber are smaller than the advertised nominal dimensions for this reason as well. (b) Shear through the thickness design capacities are limited to sections two feet or less in width; wider sections may require further reductions. The use of CDX plywood provides superior protection. Learn how to layout wainscoting with all panels a consistent size for an even look. This soft wood is what absorbs moisture, causing the wood to warp and buckle. Our calculators can simplify your woodworking project layout and estimation. Plywood is often sold in 1/4“, 1/2“, or 3/4” nominal thicknesses, but the actual thickness is often 1/32” thinner. Roof sheathing may be supported by H-clips, in addition to being nailed to the rafters. You might want to give any exposed CDX plywood some protection, especially exposed roof sheathing. Otherwise, it will absorb water, with all the ensuing problems. The point where the H-clips are, will not have any spacing, but the two sheets of CDX plywood will be butted up against each other. This CDX plywood is economic so one can easily get it and that also in enough quantities. £18.67. Herein, the letters C and D denote the quality of the surfaces (both front and back). This additional strength really helps when using CDX plywood as subfloors. The thickness of plywood panels in a subfloor is regulated by the spacing of the joists. This understanding of the face side even applies in situations where the plywood will later be covered up. 5/8 inch. Sheets are available in hardwood or softwood veneers, and in varying grades including sanded and unsanded. The only exception is plywood which is stated as âhaving no voids,â such as marine grade plywood. While the voids and splits do affect the structural strength of the plywood somewhat, that is calculated into the permissible load for the specific plywood thickness. Plywood Thickness and Weights: Sanded Nominal Thickness 1/4 3/8 1/2 5/8 3/4 1-1/8 Actual Thickness 1/4 11/32 15/32 19/32 23/32 1-1/8 Approximate weight per 4x8 sheet 22.0 28.5 40.6 48 60.8 84.5. 2.4 Common Performance Categories And Corresponding Span Ratings Performance Category Span Rating 3/8 24/0 7/16 24/16 From . Most plywood, other than hardwood cabinet grade plywood, is graded with two letters, showing the face and reverse side grading of the plywood. You can use CDX plywood for the construction of storage shelving in garages, attics and basements; places where appearance isnât important, without going through all that trouble. This plywood is moisture resistant but not meant for long term weather exposure. As its name implies, the splits and defects have been plugged. 1. Available in 3/8″, 1/2″, 5/8″ and 3/4″ thicknesses. The âCâ graded side is the face side, used where it is more visible, and the âDâ graded side is the reverse side, usually mounted in a way that hides it. A-Bond plywood is made using phenol formaldehyde resin. Commonly square edge, but may be produced with tongue and groove edges. Either roof felt or Tyvek house wrap could be used to dry in the exposed wall and roof sheathing. Show more. Nominal Thickness. Once dry, it returns back to its original size. As long as appearance isnât a concern, CDX plywood can be used to build a wide variety of smaller projects. The designation of being exterior grade plywood can also mean âExposure grade 1â which stands for damp-proof plywood used for demanding environments such as underlayments and roof sheeting. CDX plywood is an exterior grade plywood only in the sense of considering the adhesive used for connecting the veneer plys. of Plies in a Plywood. Most plywood underlayment is about 1/4 inch thick and has square edges and a smooth, knot-free top face. The smoother C side is better for putting roofing felt onto, as splits and holes can cause wear in the felt, leading to failure. The veneers are rotary cut from a log. Actual Thickness. Get hassle-free estimates from local trim carpentry professionals and find out how much your project will cost. The thickness of plywood normally used is 1/8″, 1/4″, 1/2″, and 3/4″. CDX, ACX, & Fire retardant available with chain of custody certificate. CDX plywood is often utilized as roof sheathing or for exterior walls due to its water resistance. This plywood is made with an exterior grade glue. Based upon this grading system, we can see that CDX plywood has one side that is âCâ grade and one that is âDâ grade. (c) 5-ply applies to plywood with 5 or more layers; for 5-ply/3-layer plywood, use values for 4-ply plywood. Rated sheathing, also known as CDX in the trade; ... (Panel width and length may vary up to 1/8" to aid with proper installation) Specifications. 47-7/8 (+/- 1/32) inch. 3/4â plywood by its more accurate thickness of 23/32â, 5/8â plywood by its more accurate thickness of 19/32â, 1/2â plywood by its more accurate thickness of 15/32â, 3/8â thick plywood by its more accurate thickness of 11/32â. This plywood is sold in full 4×8 sheets only. For example, 18mm plywood of 15 plies is stronger than 18mm plywood … 23/32 in. Actually, the odd number of veneer layers allow for an even number of glue layers. 34.83 kg. However, the shelving will need some longitudinal support. The letter "X" stands for exposure, which means the plywood is tough enough to withstand a … CDX Plywood has a C grade front side, D grade back side, and exterior glue. The secret to using CDX plywood for these applications is to first, design your project in such a way as to leave no exposed edges. The letters âCDXâ refer to the grade of plywood panel. Plywood Alternatives. ... CDX plywood should be a minimum of 7/16 inch thick. CDX plywood sheets exposed to the elements can withstand exposure to rain or high moisture conditions, for a limited time, without compromising structural integrity. Both types of panels swell around the edges as they get wet, but plywood returns nearly to its original thickness as it dries, while OSB swelling is irreversible. Also, having 3/8″ thickness of wood compared to 1/4″ gives more wood for the nails to hold onto. The thicker the plywood, the more noticeable depth the gap is between the planks. Actual Width. Plywood is almost always thinner than the nominal measurement due to the fact that most tooling in furniture and cabinet factories and manufacturing facilities can accommodate plywood that is thinner than expected but not thicker than expected. Face veneer is practically free from all defects. If youâre in the middle of a project and a summer thunderstorm drenches your roof sheathing or the walls of the garage youâre erecting, relaxâ¦your project will be fine. The veneers used in the core layers will also have permitted voids and splits. 3/8 Cat Ps1-09 Square Structural Douglas Fir Sheathing, Application as 4 x 8. Any such shelving made of OSB requires special construction techniques, so that there is a secure means of fastening and supporting the panels. Please note that these are nominal thicknesses. Of the two, A-Bond is more weather resistant. FSC Certified plywood for green construction. This grade of plywood has many voids in it. If you have exposed edges, cap them with hardwood. Email Address Sign Up. 3/8 inch (4) 1/2 inch (19) ... Click to add item "2 x 2 Plywood Sheathing Handi-Panel" to the compare list. Universal Sheathing Plywood, 0.75 in Thick, 4 ft Width, 8 ft Length, CDX Pine-Fir, 0.718 in Nominal Thickness. It hasnât been immersed in rosin, like a truly waterproof wood is. This number is known as a span rating. Thickness. Used it over 3/4" ply when replacing the subfloor in my house. For this reason it is very common to see actual thicknesses on the thinner side and rarely thicker than the nominal measurement. Another reason for varying plywood thicknesses is a range of manufacturing tolerances. Allow the filler to dry and then sand, before applying the flooring. APA Rated Sheathing panels are produced as plywood or oriented strand board (OSB). Even within the exterior classification we can find differences, based upon the rosin used to bond the veneers together. CDX Plywood Size, Thickness, and Availability. Although considered an exterior plywood, CDX is often utilized as the subfloor for kitchens and bathroomsâ especially for floors destined to be finished with ceramic tiles. CDX plywood sizes are typically available in sizes 3, 5, 7, and 9, and there are a variety of thicknesses available, ranging from 1/4 inch to 1 1/4 inch thickness. Exterior grade plywood, marked with an âXâ after the surface grade (CDX plywood means face side is grade C, back side is grade D, and the plywood is intended for exterior use) uses a resin that is more water resistant than interior grade plywood. Compared to CDX plywood sheets with the same thickness, these sheets have thinner layers and more of them, making this plywood stronger and denser. Width. The Laws of No. These often aren't the actual thicknesses, however, because sanding during manufacturing removes up to 1/32 inch of material. Roof and wall sheathing is such an application. Therefore, in applications where the stability of the plywood is important, it is better to use fir than pine. Fire Retardant Treated Plywood: 1/2", 5/8", 3/4". Source: inchcalculator.com. When placed across equally spaced beams, joists or rafters, CDX is almost 10% stronger than OSB, the other alternative which is often utilized as a subfloor due to its economy. : ¼ inch panels are actually 7/32” or ¾” panels are actually 23/32” etc. This added strength means less bowing/flexing in the subfloor. The weight of a panel will vary by thickness and the type. Exterior sheathing is most often Â½â thick (nominal dimension; actually 15/32â measured dimension) for both walls and roofs. Even areas that donât have voids, will have rough end grain that canât be made smooth. than CDX plywood. Plywood is often sold in 1 / 4 “, 1 / 2 “, or 3 / 4 ” nominal thicknesses, but the actual thickness is often 1 / 32 ” thinner. Add and subtract feet, inches, fractions, centimeters, and millimeters with ease. Because the actual thickness may vary measuring the plywood is the only accurate way to determine its thickness. CDX plywood is not marine grade; therefore, it should not be used for the building of boats, although it theoretically could be. In the process, it expands slightly, but will dry quickly. Title: plywoodthickness Author: jennyj Subject: plywoodthickness Created Date: … theplywood.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com, amazon.co.uk, amazon.ca, The Ultimate Guide to Sealing Laminate Floors, Install a Combination Boiler/Water Heater, Exterior Walls Construction: The Start-to-Finish Guide, The Uses of and Challenges in Cutting Formica, The Ultimate Guide to DIY Birdhouse Design, Aquarium Cabinetry: A DIY Guide to Custom Aquarium Stands, The Ultimate Guide to Building a Bat House, The Ultimate Guide to Building a Portable Generator Enclosure, How to Remove and Replace Your Load Bearing Wall, Drying Wood in the Oven: The Ultimate How-To Guide, How to Cut a Groove or Channel on Wood Without a Router. However, I have built a number of pieces of furniture out of CDX plywood, where the intent was to keep the cost low and the furniture pieces were to be painted. Packing crates or shipping large valuables and furniture are often made of CDX plywood, taking advantage of its low cost, high strength and water resistance. This type of plywood is also referred to as âstructural plywood;â a designation which means that it is intended for structural applications. Board footage is a measure of the volume of wood in the sheet. Solid, more knots than A grade, possible minor splits. Available Sizes: 4'x8' sheets; 3/8, 1/2, 5/8, 3/4 thickness Those need to be cleaned off to protect the plywood from damage. This type of plywood is used in commercial building applications to meet with building code regulations for fire suppression and/or safety concerns. The plywood will provide a stronger shelf than OSB would, with less tendency towards waviness. The higher grade panels are sanded on both sides and are sometimes referred to as Sanded Plywood or Sanded Panels. For example, a groove for the base in a cabinet needs to be the exact thickness of the plywood or the cabinet will not be stable due to the loose fit of the parts. Unplugged knots and knotholes up to 3 inches, splits and other defects allowed. Each layer is made from one piece of wood, so there are no gaps in the middle layers that could weaken the sheet or … This plywood is made with the understanding that it will be exposed to the weather, during a homeâs construction. ... Sheathing, CDX Plywood 2440mm x 1220mm" 9000189656. Plywood is most often sold in 4′ x 8′ sheets, but may also be available in 4′ x 10′, 4′ x 12′, or 2′ x 4′ sheets. 0.563 inch. x 4 ft. x 8 ft. RTD Sheathing Syp - The Home Depot CDX stands for class C to D exposed plywood. Length 8' (2438 mm) Thickness 1/2" (12.7 mm) Width 4' (1220 mm) Sign Up for Updates. Better yet, install a layer of lauan plywood over the CDX plywood, as an underlayment, providing a smooth surface for the vinyl flooring to be mounted to. A 3 / 4 ” sheet is actually 23 / 32 ” thick. Get the latest news, tips, tools and product updates for all your roofing projects. Because the actual thickness may vary measuring the plywood is the only accurate way to determine its thickness. Smooth, paintable surface. Job-site handling • OSB panels lie flat and are engineered for consistent This means that a sheet of plywood that started at 3/4” may shrink slightly after manufacturing. Get results in imperial and metric measurements. As CDX plywood is not intended for visible applications, where appearance is important, the lower cost of rotary cutting is advantageous. In both cases, weâre talking about conifers, which have needles that they do not lose in the fall. What is the Actual Thickness of a Sheet of Plywood. Of all the types of plywood available on the market, CDX grade plywood is the most commonly available in our countryâs lumberyards and building centers. It is not necessary to fill the splits or knotholes in the face veneer of CDX plywood, when used as a substrate for ceramic tile. These clips, so named due to their shape, connect the edges of adjacent sheets of plywood, halfway between the rafters, helping to ensure that one panel doesnât bow one way and the next bow the other way. There are a few reasons why the actual thickness of plywood varies. But, you can also run into problems if you go too thick. These will usually be a distinct color (green or yellow) caused by the resin they were pressure treated in, causing them to stand out from standard exterior grade plywood. Estimate how many mouldings you need to trim a room using the trim and moulding calculator. The threshold for this is about four months. For most applications the 1/32” difference is not important, but for fine carpentry it may be critical to get grooves and cuts to be precisely the thickness of the plywood. CDX Plywood Sizes, Thickness, & Availability. This makes the faux planks feel more authentic. Item #12181 Model #185109 The recommended shed floor plywood thickness is 3/4 inch pressure-treated exterior-grade CDX plywood. For this sort of shelving, it is common to use 1âx 4â or 2âx 4â dimension lumber to build a ladder framework to support the shelf. That is, C and D describe the two sides of the plywood sheet. Item Number 271066. For example, a sheet of plywood with a nominal thickness of 3/4” is often less than 3/4” thick. First, wood shrinks as it dries and moisture leaves the wood. However, marine grade plywood really isnât waterproof. When it comes to choosing a subfloor for a ceramic tile floor it is always best to choose CDX plywood over OSBâ itâs stronger and doesnât have the problems with moisture that OSB does. The wood isnât pressure treated or treated in any other way to make it waterproof, unless it is marked as being âpressure treatedâ plywood. This is mostly because void free veneers are used in the making of marine grade plywood, whereas some voids are permissible in the manufacture of marine grade plywood. The actual thickness of these plywood sheets will be 1/32 inch less than the nominal size, due to finish sanding of the sheet. This makes it usable in more visible applications, such as the building of furniture, even though it isnât a cabinet grade plywood. Buy on Beacon Pro+. Although available, it is rare to find plywood where both sides are the same grade. The major difference between them is that marine grade plywood is made of more durable veneers, which will withstand exposure to moisture better than CDX plywood.
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