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.
What does CDX mean on plywood?
What is CDX? CDX is veneer plywood, which is manufactured by gluing and pressing together sheets of wood. The letters C and D represent the grades of either side of the plywood, while X stands for exposure.
What is the difference between CDX and CDX plywood?
CDX is a type of plywood. … If so, it therefore, means CDX has the most number of knots and defects, making it a lower grade plywood. C in CDX means one side of the plywood is of grade C, and the other is of grade D.
Is CDX plywood waterproof?
Keep in mind that this kind of plywood is water resistant, not waterproof, and can still be ruined from a leaking tub or toilet. CDX plywood is often used under shingles and roofing felt, on walls (just behind the siding and insulation), and as a sub floor just under the carpet pad or a tiled floor’s durock.
How much does a sheet of CDX plywood cost?
Construction Grade Plywood
| Thickness | Type | Price |
|---|---|---|
| 15/32″ | CDX | $28.97 |
| 23/32″ | CDX | $35.97 |
What is CDX plywood good for?
CDX Plywood is used primarily by contractors to build exterior walls and roofs. CDX plywood has one side veneer grade “C” and one side veneer grade “D”. The two are bonded together with glue which can withstand a little moisture. The APA would recognize CDX Grade Plywood as C-D Exposure 1 plywood.
What kind of wood is CDX plywood?
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. There are always an odd number of layers, balancing the sheet, to prevent warping of the panels.
Is CDX or OSB better?
Although some people will ultimately choose CDX, many experts argue that OSB is better overall for roofing. OSB is far less likely to expand and contract when exposed to humidity and moisture, even though it will take longer to dry. With wrapping, though, it can withstand the elements without issue.
Is CDX plywood good for subfloor?
OSB and CDX subfloors come in tongue and groove. It’s ideal for subflooring, because it prevents the edges of the plywood from moving and squeaking after insulation. Construction adhesive is used to better seal the tongue-and-groove joint.
What glue is used in CDX plywood?
The type of glue used is an exterior glue, making this grade of plywood more versatile and also the most commonly used. CDX plywood is an exposure-grade plywood.
What plywood is best for outdoor use?
Exterior plywood is weather (and water) resistant, so it’s strong enough to be used outside and also in areas that are exposed to water and humidity, like a garage. This type of plywood, often made from Douglas fir, is made stronger by adhering its layers with a waterproof glue.
Does CDX plywood rot?
CDX plywood is exposed when it is used, which means that while it is water-resistant, it is not waterproof, and therefore it can only withstand a limited amount of moisture over a short period of time before it starts to degrade.
How long will CDX plywood last?
Plywood is characterized by great durability, but how long exactly a plywood will last outside depends on several factors. Usually, the average life expectancy of exterior plywood constructions is around 35 years if everything is finished properly, but sometimes it can also reach up to 50 years.
Is 15 32 The same as half inch?
To combat this, the dado should be cut at 23/32 inch to ensure a proper fit.
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Thicknesses.
| NOMINAL VS. ACTUAL SIZES | |
|---|---|
| 1/4-inch | 11/32 |
| 1/2-inch | 15/32 |
| 5/8-inch | 19/32 |
| 3/4-inch | 23/32 |
Which plywood is best for roofing?
Exterior Plywood is the preferred material for roofing. It also performs well when exposed to moisture over long periods of time. The price is low compared to other roofing materials and the installations are also easy.
What is marine grade plywood?
Marine Grade Plywood is an exterior structural panel, sanded on both sides, most commonly made from Douglas fir or Pine. Other species of hardwood may also be used for marine plywood, usually in the Marine (boating) industry.
What is the difference between CDX and pressure treated plywood?
Pressure-treated plywood is durable, lasting years, and doesn’t require paint or any other kind of protective coating. CDX sheathing: An inexpensive type of plywood, CDX sheathing should never be left uncovered. It’s usually covered with bricks or shingles for roofs, garages, or storage bins.
What is the difference between CDX and OSB?
The major distinction between these categories is the actual construction of the sheets. What is this? CDX plywood is created by bundling layers of wood together. … Oriented strand board (OSB) combines wood chips, glue, and resin into the shape of a sheet of plywood and bakes them together.
What is a waterproof plywood?
What is waterproof plywood? Waterproof plywood is a moisture resistant material that many people use for various purposes in their home. It is great for outdoor usage, as it is resistant to various weather conditions, such as rain, sleet, snow, etc.
What size plywood should I use for a hurricane?
Select 5/8-inch or 3/4-inch plywood – anything thinner won’t endure the impact of projectiles blown by strong winds. Protection is limited if hurricane shutters aren’t constructed with the right material and installed properly.
Can you use CDX plywood for siding?
Allow panels to dry properly prior to installation. All wood will expand and contract so always leave a 1/8” gap between all joints and seams to accommodate swelling with varying moisture conditions. In any case, I cannot recommend using CDX plywood of any sort as siding.
Can you use CDX plywood roof?
A special grade of plywood called “CDX” is a popular choice for roof sheathing. No, the “X” in CDXplywood does not stand for “exterior.” Rather, it references the kind of glue used to bond the layers of veneer together. CDX plywood can withstand temporary exposure to rain and other moisture sources.
Is CDX stronger than plywood?
CDX plywood is not good moisture resistant. But it is stronger and more durable than OSB. It is used for roof sheathing, construction of crates and boxes, garage shelves, sub-flooring, and low humidity.
What is the best wood to use on a roof?
Cedar has earned a reputation for being strong, flexible, and weather resistant – qualities that make for an effective roofing shingle. Among roofing shingle manufacturers, cedar is the go-to material, all thanks to its durability.
What size plywood is best for subfloor?
The minimum thickness of plywood for subflooring is about 5/8 inch. Since it does not hold fasteners as well as plywood, OSB must be a little thicker, or at least 23/32 inch.
What plywood should I use for subfloor?
Plywood Subflooring
Plywood has been a standard subfloor material since the 1950s and remains the preferred subflooring for many builders. Standard plywood can be used for subfloors, but a better material is 3/4-inch tongue-and-groove plywood subflooring.
What size plywood is used for subfloor?
A plywood subfloor generally uses 1/2-inch to 3/4-inch-thick sheets of plywood that have one rough side (which faces down) and one smooth side, which faces up. The sheets are generally 4 x 8 or 4 x 12 feet in size.
Is CDX plywood rated for outdoor use?
CDX plywood, a stock item at most lumberyards, is a utility grade suitable for most outdoor projects.
Does CDX plywood have Formaldehyde?
Phenolic formaldehyde glue is one of the formaldehyde based family of adhesives commonly used in the production of pressed wood products. It is primarily used as the glue in structural external rated softwood plywood panels such as CDX.
Does painting plywood make it waterproof?
Painting plywood is a quick and easy way to waterproof it. If your plywood will be going outdoors, exterior latex paint is the better option, while indoor projects are well-suited to interior latex paint.
What is the difference between CDX and RTD plywood?
RTD and CDX plywood are essentially the same exposure 1 graded plywood, except for the superior manufacturing quality of the RTD plywood. This higher quality in the manufacturing process is what makes the RTD plywood a superior product to its CDX predecessor.
How do you waterproof plywood outdoors?
To use plywood outdoors, seal it by applying multiple thin layers of polyurethane varnish, epoxy sealant, spray-on latex, waterproof paint, or drying oils like Thompson’s WaterSeal.
Can you paint CDX?
CDX plywood has one smooth side and one rough side. Although it is constructed from waterproof glue, it still needs painting if used outside.
Which side of exterior plywood faces out?
The smooth side has a better moisture resistance and will ultimately provide better performance against weather. Facing the board smooth side out will maximize its ability to keep moisture out of the structure. It is simple why manufacturers create roughness on OSB boards.
Can you paint exterior plywood?
In some cases, painting of plywood is required or desirable. Top quality acrylic latex paints are the best choice for exterior surfaces. For best performance, use MDO plywood if it is to be painted. Paint on MDO will not fail from checking of the wood or from peeling because of the wide dark bands of summerwood.
Is ACX plywood waterproof?
ACX plywood is also extremely weather-resistant. The ‘X’ in ‘ACX’ refers to a waterproof glue that makes this type of wood less prone to damage from adverse weather conditions like rain.
Why is half inch plywood not half?
Plywood is often sold in 1/4“, 1/2“, or 3/4” nominal thicknesses, but the actual thickness is often 1/32” thinner. Because the actual thickness may vary measuring the plywood is the only accurate way to determine its thickness. A 3/4” sheet is actually 23/32” thick. A 1/2” sheet is actually 15/32” thick.
What does 15 32 convert to in inches?
SAE to Metric Conversion Chart
| Standard (SAE) | Metric (mm) | Inches (decimal) |
|---|---|---|
| 13/32″ | 10.3188 mm | 0.406″ |
| 11 mm | 0.433″ | |
| 7/16″ | 11.1125 mm | 0.438″ |
| 15/32″ | 11.9063 mm | 0.469″ |
What thickness is 15 32 plywood?
Sheathing Plywood (Common: 15/32 in. x 4 ft. x 8 ft., Actual: 0.438 in.
What size plywood should be used for roofing?
Most Common Thickness
The most common rafter spacing is 24 inches, and 5/8-inch plywood is recommended for that. It will support roof loads for most situations and is the standard for most roof applications. Roofs with very heavy loads may require 3/4-inch thickness.
What is the best thickness for roof sheathing?
The recommended thickness for roof sheathing is ⅝” thick. Sheathing with a thickness of less than that is much more likely to result in bowing between framing which could potentially compromise your exterior roof material.
Can you use 7/16 OSB on a roof?
Standard types of wood designed for roof sheathing are oriented strand board, known as OSB, and plywood, the most popular being OSB. Sheets of 7/16-inch thick, without edge support, can be used in an area where the snow load is 30 pounds per square foot.
Is marine plywood suitable for outdoor use?
These qualities are what make this plywood a popular choice for building boats and boat parts. It’s also a smart option for durable outdoor furniture projects in coastal areas, especially after it receives a strong protective finish.
What is the difference between marine grade plywood and exterior grade plywood?
There can be no voids or holes hidden on the inner layers of marine grade plywood. Accordingly, it is denser and stronger than exterior plywood. The edges tend to cut and sand cleaner than the standard plywood. Marine plywood is intended for use in boat building or other marine applications.
How can you tell if plywood is marine grade?
How to Identify Marine Plywood?
- Smooth Finish. Both sides of marine plywood are smooth, Whereas the surfaces of regular plywood are rough. …
- Bending capacity. Good plywood should not bend much. …
- Weight. marine plywood weight. …
- Knots on surface. …
- Voids and Gaps. …
- Number of Layers. …
- Quality veneers. …
- Check the label.