What is rtd plywood used for

FlamePRO® Fire-Retardant-Treated Wood (FRTW) has been tested for fire performance by several independent laboratories and meets model code requirements for a Class A/Class 1 fire retardant. This plywood has been grade stamped and third party inspected to ensure quality.

plywood is graded by thickness, which is pretty obvious, species (some sort of pine, if not specified), and the quality of the faces, and whether its rated for exterior use. So 3/4 ACX is 3/4 thick (nominally, usually bit less) pine or fir or spruce, one side A grade, the other C, rated for exterior use. CDX, commonly used for sheathing is ...2021 will be remembered as the year that ransomware gangs turned their attention to critical infrastructure, targeting companies built around manufacturing, energy distribution and...01. 02. Ideal for residential and light commercial construction. Quality construction, durability and impact resistance. Stiff and strong. A strong and rigid plywood roof sheathing, Plytanium plywood sheathing panels provide outstanding performance for residential and light commercial builds.Plywood weight is determined by the length, width, and thickness of the panel, as well as the wood species and the types and amounts of adhesives, primers, and sealants used to make the plywood. This goes for all other types of engineered wood panels as well. Plywood, OSB, particle board, etc. are manufactured using adhesives, primers, and ...What Is RTD Plywood and Its Categories. RTD plywood is often deemed the modern grade plywood generation manufactured for the construction industry. In contrast to other plywood types, the abbreviated term doesn’t indicate the plywood grade. RTD stands for ‘Resistance Temperature Detector,’ a detector used to develop this type of water ...Uses of RTD plywood in construction. Flooring: RTD plywood is often used as a subfloor for new or renovated homes. Wall paneling: RTD plywood can be used to create a smooth and uniform wall surface. Cabinetry: RTD plywood is a popular choice for kitchen cabinets and other custom cabinetry because of its stability and ease of use.4. TL. ≈ 44 psf. Based on the specifications for this design example, the design capacity of the 32/16, 4-ply SHEATHING SPAN plywood panels is controlled by bending stiffness. The 44 psf represents the maximum uniform load that can be applied to the panels before the deflection criterion of span/180 is exceeded.Use pressure treated 3/4 inch construction grade exterior plywood for the floor. It’s solid, won’t sag, and protects the substructure and is easy to sweep. On the shed walls use exterior rated 1/2 inch plywood for a waterproof finished look, and 3/4 inch CDX plywood on the roof for strength. In this article I’ll explain my recommendations ...

6 Dec 2021 ... board and plywood are both hugely popular sheeting materials used in modern-day property builds. Whether they're being used in wall sheathing ...Apply oil-based rather than water based to prevent grain rise. Allow 30 minutes drying time between coats. Lightly sand between coats with 120-grit sandpaper to provide a bonding surface for subsequent coats. Flip the plywood and repeat on the opposite side. Spray on three coats of oil-based paint with an electric paint sprayer.23/32 in. x 4 ft. x 8 ft. CCX Ground Contact Pressure-Treated Pine Plywood. Plywood sheathing is ideal for residential and light construction. Every piece meets the highest grading standards for strength and appearance. It adds proven performance and durability to new homes, room additions and renovations.Plywood Features. No Additional Features. Plywood Product Type. OSB. Span Rating. 16/0. ... If I use this panel with the reflective side facing inward in greenhouse construction will it radiate the heat back into the ... 11/32 in. x 4 ft. x 8 ft. Rtd Southern Yellow Pine Plywood Sheathing (1390) $ 24. 00. ARAUCO. 15/32 in. x 4 ft. - 8 ft. Wood ...OSB sheathing is typically considered to be more economical than plywood. Over the years, however, a negative stigma has developed in association with OSB, as builders have reported the sheathing to swell, lose structural strength and even develop bio-organic growth (BOG) when exposed to moisture. Being building consultants, many of our Builder ...

Exterior Plywood. Exterior, is the grade given to any plywood which is bonded with 100 percent waterproof adhesive and is intended for permanent outdoor exposure. Exterior plywood must be graded a C or above, meaning knots and knot holes of up to 1½ inches are allowed. The species of wood can also vary and often different species are combined.WBP, an acronym for "Weather and Boil Proof," denotes a specific category of plywood meticulously crafted to withstand the rigors of exposure to the elements and moisture. This sets it apart as an ideal choice for scenarios where conventional plywood might succumb to the deteriorating effects of water, humidity, and fluctuating temperatures.The 'CDX' is actually a combination of ratings that provide information as to the quality and construction of the plywood. The quality of wood can be evaluated based on knots, splinters, color, durability, and more. These features are assessed and then assigned a rating - either A, B, C, or D. Just like in school, A is the highest rating ...OSB sheathing is typically considered to be more economical than plywood. Over the years, however, a negative stigma has developed in association with OSB, as builders have reported the sheathing to swell, lose structural strength and even develop bio-organic growth (BOG) when exposed to moisture. Being building consultants, many of our Builder ...

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RTD Plywood. RTD plywood is manufactured in a similar manner to other plywood using waterproof resins, except that when heated and pressed to bond the layers together, a special tool is used. The tool is a Resistance Temperature Detector and ensures that the exact amount of heat necessary to activate the bond is used. This means the plywood is ...Once mixed, apply the solution to the water stain using a clean cloth. Gently rub the stain in a circular motion for several minutes until the stain is gone. Once removed, use a dry sponge or paper towel to remove the mixture. Clean the wood with furniture polish and a lint-free cloth to remove all remnants.Nov 13, 2020 · Related Posts: How to Build a Lean-to Shed by Admin July 25, 2023 DIY Extra storage is always helpful for any household. The average house doesn't seem to have enough storage space for all the stuff. Some handle this… How to Level an Uneven Plywood Floor by Amy Reed December 26, 2022 DIY Plywood sheets are best used for …Jan 31, 2019 · Pros. Because it comes in decorative as well as utility grades, plywood has more uses than OSB. Higher grades can be stained and finished just like wood. The smooth face of plywood makes a better subfloor surface for laying tiles. Plywood tends to be about 10 percent stiffer than OSB and is better at holding nails.

There’s a big gulf between being transparent and being honest For a man facing financial ruin, endless lawsuits across the world, and possible criminal charges, Sam Bankman-Fried i...The ‘CDX’ is actually a combination of ratings that provide information as to the quality and construction of the plywood. The quality of wood can be evaluated based on knots, splinters, color, durability, and more. These features are assessed and then assigned a rating – either A, B, C, or D. Just like in school, A is the highest rating ...The raw materials, plywood sheets, and thermosetting resins ensure exceptional strength and moisture resistance. Advantages of RTD Plywood. RTD plywood has very high durability, strength, and resistance to moisture and other environmental factors. Its versatility allows it to be used in many types of projects.Yes, you can use pressure treated wood in the bathroom. Chemicals that protect the wood from moisture, molds, and water damage make it ideal for bathrooms. Don't use it on surfaces where people have direct contact with it, such as countertops. You can use it to make a bathtub caddy or a shower bench. 👉 woodworkingclarity.com.Poplar wood is commonly used for furniture, interior and exterior construction, plywood, veneer, molding, and paper production. It is a versatile and lightweight wood that is easy to work with due to its straight grain and fine texture. In addition to its use in practical applications, poplar wood is also popular for craft projects, such as ...Especially in relation to OSB or Plywood use for Roofs, Walls & Floors. OSB is made of small and fairly rectangular-shaped wood chips from small resinous trees, which are bonded into a panel form with wax and synthetic resin. Plywood on the other hand, is made with thin sheets of wood that have been cut from a spinning log, then glued together ...Plywood sheets are considerably lighter than chipboard. This is owed to its low core density, compared with chipboard, which has a high density. Being lighter, plywood is easier to carry and maneuver than chipboard. But, just because it's lighter, it doesn't mean it isn't stronger. Plywood has a higher strength-to-weight ratio, meaning an ...Use pressure treated 3/4 inch construction grade exterior plywood for the floor. It’s solid, won’t sag, and protects the substructure and is easy to sweep. On the shed walls use exterior rated 1/2 inch plywood for a waterproof finished look, and 3/4 inch CDX plywood on the roof for strength. In this article I’ll explain my recommendations ...Feb 5, 2021 · Common uses of plywood include: Flooring and roofing. Plywood’s low-cost price serves as the ideal ceiling option, roof sheathing or obtaining quality hardwood floor designs. Although water-resistant, it is advisable not to install plywood in the bathroom and kitchen floors. Exterior and interior wall. To achieve a desirable finish on ...Plytanium Sanded Plywood Sheets & Panels | Georgia-Pacific. 01. 02. Smooth, sanded panel for use in interior and exterior applications, such as cabinets, shelving, furniture, porch ceilings and soffits. Ideal project panel due to smooth, sanded face and attractive appearance when painted. Simple to cut and fasten.RTD plywood is a specialized type of plywood designed for use as a flooring material in construction projects, particularly in applications where speed and efficiency are crucial. It is commonly used in high-rise construction projects, bridges, stadiums, and other large-scale developments.Plywood sheathing is a plywood board used to sheath a surface from heat transfer or internal impact. It is thin and sturdy when used for structural strength and thick and soft when used for temperature regulation. There is no universal standard for plywood sheathing. In this article, you will learn more about plywood sheathing, its two types ...

RTD plywood has a lower chance of delamination compared to BCX and also other plywoods. Usage: RTD plywood is sometimes referred to as RTD sheathings and is mainly used for roofs and also applied to other outdoor exteriors of buildings. CDX vs BCX Look and feel: CDX plywood has a rougher look and feel than BCX plywood. Price:

One notable difference here is that marine-grade plywood is usually made out of extremely high-quality hardwood. On the other hand, pressure-treated plywood is generally made out of softwood. This in itself leads to many of the other differences that we will discuss further below. For instance, hardwood is of course much harder and more durable ...An RTD stands for “ Resistance Temperature Detector ” and it is a sensor whose resistance changes when its temperature changes and it is used to measure temperature. The RTD’s resistance increases linearly when the temperature increases. Many RTDs are called wire wound. They consist of fine wire wrapped around a glass or ceramic core.Jillian Michaels explains that mental health is just as important as physical health and helps us “find our why" in this podcast. Listen Now! The new year is upon us, and that mean...The coating used on RTD Plywood helps protect the wood from water damage, making it an ideal choice for applications where exposure to moisture is a concern. What is Rtd Plywood Used for . RTD plywood is a material used in the construction of various projects, from furniture to flooring. It stands for Ready To Do, as it is already cut and ...3 days ago · A thermocouple is composed of two wires made from dissimilar metals. These two wires are joined to form a temperature measurement junction. Each wire is made of a specific metal or metal alloy. For example, the positive (+) conductor of a type K thermocouple is made of a chromium/nickel alloy called chromel and the negative (-) …Cdx Vs Rtd Plywood. September 22, 2022 Webster West. What with it’s incredible strength to weight ratio, it’s no secret as to why plywood is widely used for construction. Used to make walls, roofs, and even sub flooring, this engineered wood has great shear strength. Well, plywood is constructed by gluing wooden veneers together.Can You Use 3/8 Plywood For Roofing. Yes, 3/8 inch is the standard plywood size for most roofs in areas with light load requirements on rafters at 16 centers. 1/2 inch is the minimum, while 5/8 is the most commonly used with rafters spaced at 24 centers. However, 3/4-inch plywood is recommended for heavy load-related areas, regardless of rafter ...Construction - ACX plywood is made by laminating multiple layers of veneer together, while BCX plywood is made by cross-banding multiple layers of veneer. Strength - ACX plywood is stronger than BCX plywood and is less likely to warp or shrink over time. Cost - ACX plywood is more expensive than BCX plywood.RTD Plywood can be used for a variety of projects, including residential and light commercial construction. You can use RTD plywood for walls, roofs, ceilings, and even floors. Since it is made from treated wood, it is also resistant to moisture and insects, which results in a longer life span than regular plywood.

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A: RTD means it is rated for exterior use and resists moisture. RTD stands for Resistance Temperature Detector, which is the technology used to create the plywood. CDX Plywood, on the other hand, is a type of plywood grading system. It is graded A to D, with an A rating being the best quality while a D is the lowest quality.RTD plywood is one of the newest and most advanced forms of plywood on the market today. Understanding what RTD plywood is and what it can be used for is extremely helpful for those who want to make a wise decision on their next building project. It can also help you to weigh the benefits of RTD or CDX plywood, two of the most common varieties ...Build the smokehouse walls to accommodate a shed type roof, with the front side higher than the back and both side walls angled.For the roof itself, normal construction methods can be used, setting joists across the span between the front and back walls, with plywood sheathing over that, covered by normal asphalt shingles.Just make sure that the gaps between the joists are filled, so that ...Nov 30, 2023 · It is commonly used for sheathing, subfloors, and roof decking due to its strength and stability. RTD plywood comes in various thicknesses, giving builders …Lower weight - Plywood is lower weight than a comparable sheet of drywall. A 5/8″ sheet of drywall weighs 2.75 pounds per square foot, while a 5/8″ sheet of plywood weighs from 1.8 to 2.1 pounds, depending on the type of plywood. Easier installation - Plywood can be used naturally without taping and finishing.Nov 30, 2023 · 2. RTD Plywood vs. Marine Plywood. RTD plywood and marine plywood both have excellent strength and durability. However, marine plywood is specifically designed for use in water-exposed environments and is made with high-quality veneers and moisture-resistant adhesive.Save on your password security with Keeper Security promo codes. Get the latest on Keeper Security promo codes, coupons, and May sale on PCWorld. PCWorld’s coupon section is create...Cutting mortise and tennon joints in plywood would prove difficult. The answer is in the article ;) Avoid softer woods like poplar or pine. Hardwoods will last longer, but these are just workhorses, so consider your wallet, too. Ash, red oak, and hickory are low-cost options. I would use pine or poplar.A: It's far more obscure, but RTD stands for "resistance temperature detector". It's simply a manufacturing process that detects defects that can lead to stresses later and delaminate the plywood. By passing these processes, it's laterally stronger than more traditional manufacturing processes. The description states it is 5-ply.Linden plywood is commonly available in a variety of thicknesses ranging from 3/16" up to 3/4". Some of the thinner variants come with a MDF core. Thicker linden plywood will typically have two more core veneers than other types of plywood, although the price is lower than most domestic hardwood plywood. Linden is also used to make core ...RTD plywood is a specially engineered type of plywood. Just like BCX plywood, RTD plywood also has water-resistant glue. But, where these two plywood’s differ, is in the way their glue was treated, at the time of … ….

Linden plywood is commonly available in a variety of thicknesses ranging from 3/16" up to 3/4". Some of the thinner variants come with a MDF core. Thicker linden plywood will typically have two more core veneers than other types of plywood, although the price is lower than most domestic hardwood plywood. Linden is also used to make core ...Fire-rated plywood can help protect a building and the people inside it in the event of a fire. When this type of wood is exposed to a fire, it creates a non-combustible gas and water vapor to hinder combustion. It is also designed to form a layer of protective char that insulates the wood against deeper damage.Constructed from high-grade veneer, this plywood is used to construct decks and boats. Marine Grade Plywood is arguably the strongest plywood on the market, and its eye-watering price reflects that. A 4×8 foot sheet of exterior graded plywood can cost around $10 a sheet. Marine Grade Plywood, on the other hand, costs roughly $100 per 4×8 sheet.The main difference between OSB and plywood is their composition and the manufacturing process used to produce them. OSB is typically cheaper than plywood and is more uniform in strength and quality, while plywood has better moisture resistance and is generally considered to be more durable.Use pressure treated 3/4 inch construction grade exterior plywood for the floor. It's solid, won't sag, and protects the substructure and is easy to sweep. On the shed walls use exterior rated 1/2 inch plywood for a waterproof finished look, and 3/4 inch CDX plywood on the roof for strength. In this article I'll explain my recommendations ...Rated sheathing can be used in subfloor, wall, roof and general construction applications. Span ratings on the back of the panel denote the maximum recommended center-to-center spacing of supports, in inches, when installing the panel. Multi veneer construction for durability and strength. Produced from western species for improved structural ...The adjacent rings will not have any pores and are lighter. By and large, softwoods have a higher growth rate than hardwoods, allowing for more rapid reforestation and the wood produced by softwood trees to be sold for less. This is the main reason why softwoods are more common and are used regularly for building materials. What is rtd plywood used for, Significance of Platinum in High-Temperature RTD Sensors. Platinum is an important component of high-temperature RTD sensors for the following reasons: Platinum offers high physical and chemical stability. RTDs are constructed compactly and well suited for high-temperature applications. Both temperature probes and surface mount RTD sensors are ..., Sheathing Plywood. Internet # 206971071. Model # 106128. Store SKU # 1001754130. ... Use of this site is subject to certain Terms Of Use. Local store prices may vary from those displayed. Products shown as available are normally stocked but inventory levels cannot be guaranteed., A-grade plywood has a smooth, sanded surface that is free of knots. Any apparent flaws have been filled with wood or synthetic filler. B-grade plywood also has a smooth, sanded surface, although it allows for more repairs and tight knots up to 1 inch across. C-Plugged-grade plywood has an improved, touch-sanded C veneer face., Plywood is made of several layers of veneer, thin sheets of wood sawed off from trees. The layers are glued together and if water-resistant glue is used, it is exterior plywood. Pine, spruce, mahogany, Douglas fir, birch, oak and maple are types of wood used for exterior plywood. Exterior plywood used the traditional grading system but uses the ..., Jun 3, 2023 · 1. One Is a Brand, the Other Is Not. The biggest notable difference here is that plywood is of course just a type of engineered wood. Yes, Plytanium is also plywood, however, one is just the name for a type of wood, whereas Plytanium is a type of plywood that comes to us from a specific brand. 2., RTD: Rapid Transient Determination. Academic & Science » Electronics. Rate it: RTD: former code for Rotunda, Florida USA (now closed) Regional » Airport Codes. Rate it: RTD: Redundantly Taxed District. Governmental » State & Local. Rate it: RTD: Really Tight Derriere. Miscellaneous » Funnies. Rate it: Rtd: Retired. Business » Occupation ..., Research and development, Research and Technical (or Technological) Development. Resistance Temperature Detector, a resistance thermometer; RTD is also used to rate or describe plywood manufacturing processes where RTD sensors significantly reduce the delamination caused by insufficient heating of the plywood during the press cycle., RTD plywood, as the name suggests, is ready to deliver straight from the manufacturer. This plywood is often pre-sanded and pre-finished, saving time and effort during the construction process. 2. Appearance: RTD plywood typically boasts a smoother surface due to the pre-sanding process. The finished product offers a polished and refined look ..., An RTD is a resistance temperature detector. It is essentially a thermocouple, designed to provide real time, very accurate temperature readings. RTD plywood appears to be exposure grade 1 plywood manufactured using RTD technology to control the temperature of the glue during application and curing., The density of plywood is roughly 34.08 pounds per cubic foot. Because plywood is a flat material, it is generally measured in mass per area rather than mass per volume. Thicker pl..., Thermostat Radiant Barrier Sheathing | OSB Radiant Barrier Sheathing. 01. 02. 03. Increases indoor comfort while helping reduce cooling energy costs. Reflects up to 97% of the sun's radiant heat. Can help save up to 17% on cooling energy consumption during peak summer months. Thermostat OSB radiant barrier sheathing reflects up to 97% of the ..., RTD stands for “Resistance Temperature Detector”. It is an engineered wood product primarily used for wall and roof sheathing. Many believe this RTD plywood is an upgraded version of CDX plywood. RTD plywood is a great option for roofs and other outdoor applications. What is CDX Plywood? CDX Plywood is mainly designed to build exterior ..., Jun 29, 2022 · An example is when CDX is used for subflooring. Though it will resist water for a few months, it will need to be covered with a sheath for long term use (and that sheath is oftentimes OSB). Only use CDX plywood for the interior of a house, where water damage is far less likely. Do not use CDX for roofing, sheds, or other places that are exposed ..., Start by removing all of the cushions from your couch and setting them aside. Measure the inner section of the couch's frame, where the seat cushions sit. Measure lengthwise from the base of one arm to the base of the other. Measure from back to front, only taking the frame portion into account., RTD plywood is a prefabricated panel used for various building and construction purposes. It is made out of several layers of thin wood veneer, which are cross-laminated and bonded together with a special adhesive. RTD plywood is a great choice for interior and exterior construction, cabinetry, furniture, floors, walls, roofs, and decks., This should be your starting point for installing the plywood over the linoleum. Check to see if that corner is exactly square. You can either do this with a framing square, or with a tape measure. Measure and mark a point exactly 3' from the corner on one wall and exactly 4' from the wall on the other corner., Get free shipping on qualified 19/32 Sheathing Plywood products or Buy Online Pick Up in Store today in the Lumber & Composites Department. ... 19/32 in. x 4 ft. x 8 ft. Rtd Sheathing Syp. 0/0. Related Searches. 1/4 inch plywood 4x8. 4x8 pressure treated plywood. 3/4 plywood 4x8. plywood flooring., Similar to OSB, plywood is a cheaper option than today's hardwoods. It makes use of fast-growing birch trees, once more sparing the environment from major deforestation. Furthermore, because of its structure and the way it's been laminated, plywood can improve the stability of the original wood., The adjacent rings will not have any pores and are lighter. By and large, softwoods have a higher growth rate than hardwoods, allowing for more rapid reforestation and the wood produced by softwood trees to be sold for less. This is the main reason why softwoods are more common and are used regularly for building materials., There is plywood and there is plywood. The typical fir plywood from your big box stores may have exterior glue, but is still only marginal for outside use, and would need a very good paint job. But fir plywood doesn't paint very well, with the grain telegraphing itself through multiple paint layers, barring tedious filling., Sep 28, 2021 · Materials Used: Plywood is composed of thin wood veneers stacked and glued in alternating directions, while OSB utilizes strands arranged in layers that are held together by resin. Price: OSB is an economical choice for any individual looking to save without compromising quality. It’s significantly more affordable than plywood, so you can ..., Sande plywood is typically used in marine applications. For example, it is commonly used in boat-building. Also constructed out of high-grade wood and is known for having many advantages over standard plywood. The primary difference between this marine plywood and standard varieties found at most hardware and home improvement stores is that ..., To save time, it's best to start off with Grade A plywood. If you must sand the plywood, lightly scuff the surface with 120-grit sandpaper. Next, wipe the wood down with a rag soaked in mineral spirits. Once the wood is dry you can apply primer with a brush or roller. Once the primer has cured, apply the paint!, 1). BCX Plywood is comprised of two different graded plywood sheets. It has then been glued using exterior graded water-resistant glue. 2). RTD plywood has been manufactured using a device called a Resistance Temperature Detector. 3). RTD plywood's glue is more water-resistant than the adhesive used on BCX plywood., Yes, plywood can be strengthened by making a plywood and fiberglass composite. This is fairly common for boat decks, where the fiberglass outer shell is backed up by a plywood core or sometimes even a balsa wood core. Fiberglass adds a lot of stiffness to the plywood, especially when it coats both sides. The fiberglass resists stretching, which ..., Q: Can screws be used instead of nails for attaching wall sheathing to framing?. A: Roe Osborn, a senior editor at JLC, responds: There is a common misconception in the building industry that screws always outperform nails when attaching wood to wood. It's true that screws have a highly effective withdrawal resistance, which makes them excellent fasteners for tasks such as avoiding squeaks ..., Most plywood, as many other wood products, are "scant". In the case of plywood, generally the actual thickness is 1/32" LESS than the named thickness. For example, ¾" actually measures 23/32". Marine and particle boards generally are true full measure net sizes. Treated Plywood Similar to treatments used on lumber., DIN Class C: ±0.60°C (IEC 60751 F 0.6) EI Sensor Technologies offers Platinum Thin Film RTDs. Capable of withstanding operating temperature from -200°C up to +850°C. Higher temperature ratings are available thru special order. Our standard resistance values for our leaded and surface mount devices are 100Ω, 500Ω and 1,000Ω with a TCR of ..., Aug 2, 2023 · RTD plywood stands for Ready-To-Dispense plywood, an engineered wood product used in various construction applications. Is RTD plywood suitable for outdoor …, Like all plywood, sanded plywood’s cross-graining construction means it’s quite strong, impact-resistant, and has superior dimensional stability. OVERLAY PLYWOOD Otherwise known as medium-density overlay panels, or MOD panels, overlay plywood is a paintable surface made of plywood that’s treated with a weather-resistant resin overlay that ..., Apr 27, 2022 · Tip. The right type of plywood for your bathroom's subfloor will vary based on the type of floor you are placing over it. For hardwood, tongue-and-groove CDX plywood rated AC with a 5/8- to 3/4-inch …, Hover Image to Zoom. $ 28 93. Limit 90 per order. Pay $3.93 after $25 OFF your total qualifying purchase upon opening a new card. Apply for a Home Depot Consumer Card. Plywood sheathing for use in construction. Can be used as wall and roof sheathing. Stiff, durable and dependable panels. View More Details., The "X" means that the plywood is water-resistant and suitable for outdoor use. Based upon this grading system, CDX plywood has a "C" grade side and a "D" grade side. The "C" graded side is the face, used where it is more visible. The "D" graded side is the reverse side, usually mounted in a way that hides it.