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Composite & synthetic decking choices, properties, & installation procedures. The most common type of composite decking is made of wood fibers mixed with plastic, which is then formed into planks up to 20 feet in length. Solid planking is available in 2x and 5A sizes. Some products are made to resemble real wood, at least from a distance, while others offer a range of colors.
This article series describes critical safe-construction details for decks and porches, including avoiding deck or porch collapse and unsafe deck stairs and railings. Our page top photo shows several colors of synthetic decking installed at a New York building supply outlet.
Using Composite Decking: Synthetic or "Plastic" Deck Boards
Good decks are primarily built to promote leisure and comfort, but they can require a fair bit of upkeep to keep them looking good. Composite decking has been gaining in popularity in recent years because it significantly reduces the maintenance that a deck needs from year to year.
New products are being introduced all the time, though many of them are not available in all areas or carried by all stores. If you are curious about composite decking, plan to visit as many stores as possible and do some research on the specific products available to you.
The composite deck board photo at left shows that the deck actually collapsed during work on the structure, revealing rotted wood structure over which the deck boards had been added as a "repair".
Some manufacturers have begun offering composite lumber that can be used for railings and fascia boards, giving you the opportunity to construct the most visible portions of a deck out of the same material. You may also be able to use composite lumber for stair treads and risers.
Watch out: Composite lumber is generally not as strong as wood, which is why it is not used for structural framing. The strength of composite decking varies from product to and installation.
Decking made with recycled polyethylene (PE) may require shorter spans than products made with poly- vinyl chloride (PVC), which itself may not be able to span quite as much as some solid wood decking.
Each product is made from a unique mix of materials, and some may fade more than others.
With a growing variety of products available and an expanding list of happy consumers, composite decking is rapidly becoming the material of choice for those seeking a low-maintenance deck. Because of its flexibility, it is also well suited to use in curved decks and even matching benches.
Watch out: synthetic decking is not a "forever" material and can deteriorate, break, even collapse as we illustrate in some photos here and as has been reported elsewhere. [citations needed]
Cutting and Drilling Composite Deck Materials
Although composite or synthetic decking itself is relatively recent,, you do not
to acquire new tools and skills to work with it. Composites can be cut and shaped just like solid wood.
Use regular carpentry tools to cut, drill, and shape composite lumber. Fine-toothed, carbide- tipped blades work best.
Cutting or drilling composite lumber may produce a sharp burr, which can be quickly eliminated with a rasp or sandpaper.
Staining and Painting Composite / Synthetic Deck Materials
Unlike wood, according to some sources composite decking does not have to be coated with a protective finish. If you are not satisfied with the color choices available, however, or if you would like your deck to match the color of your house, most products can be stained or painted. Keep in mind that if you do apply a finish, you will have to re coat the surface regularly. Some manufacturers suggest oil-based paints and stains for their products, while others recommend latex finishes.
Composite lumber does not necessarily have to be coated with a protected finish, but for decorative purposes you can stain or paint as suggested by the manufacturer.
Watch out: check the coating requirements or recommendations given by the manufacturer of the particular synthetic decking material you are choosing.
Fastening Requirements for Synthetic Decking, Trex, Plastic or Similar Products
Most composite decking can be attached with standard deck screws or nails. Some manufacturers suggest that you drill pilot holes before driving screws, others do not.
Vinyl decking is another low cost option, although one that offers a particularly nontraditional-looking deck. Installation differs as well. In general, first an aluminum or vinyl track is installed across the joists, and then top pieces are snapped into place.
Note that in this immediate discussion we have eschewed environmental and health questions concerning the use of treated wood, vinyl and other manmade products, as well as questions of renewable resources and environmental impact. Articles on those topics can be found at InspectApedia.com such as at
Sorting Synthetic Decking by Board Types: solid, webbed, other
Solid Composite Decking
Solid composite decking is the composite product most similar to solid wood and can be fastened accordingly. Hidden fastener systems can also be used with some products, but check with both the fastener and composite manufacturers for compatibility. Some solid composite boards may have a slight cup, which should be installed facing up to allow water to run off.
Webbed, or hollow-core, composite decking is available in both rectangular and tongue-and-groove profiles. Because of the products’ design, manufacturers specify exactly where fasteners must be driven in each board.
In a companion article on this topic, SYNTHETIC & COMPOSITE DECK BOARDS - Best Construction Practice, Mr. Bliss points out that the oldest solid composite decking on the market is Trex®,
but competitors now include Boardwalk® (Certainteed),
ChoiceDec® (Weyerhauser), and products from several
Some products are made with a surface groove to accommodate fasteners. You can buy matching caps to enclose board ends, or you can install fascia boards.
Attach composite decking with screws and nails, as recommended by the manufacturer. Some products tend to flare up a bit when the screw head enters the decking. If that happens, draft the screw about 1/8 inch beneath the surface, this step will hide the screw.
With Webbed decking, fastener placement can be particularly important. This 2 X 6 product requires that screws be driven only through the outer cores, not the center one.
Where to Buy Composite & Plastic Decking Materials
Building Supply Stores such as Home Depot & Lowes stock a variety of composite and synthetic decking products including those shown in the photographs above. At left is an image of the Veranda Composite Decking warranty.
Boardwalk solid composite decking with hidden fasteners
and optional railing system
Composite Building Products International
Xtendex hollow composite decking system with optional
Correct Building Products www.correctdeck.com
Solid composite decking with hidden fasteners and
optional railing system
Fiber Composites www.fibercomposites.com
Fiberon solid composite decking and optional railing
Kadant Composites www.geodeck.com
Geodeck hollow composite decking and railing
Kroy Building Products www.kroybp.com
Timberlast solid composite decking with optional hidden
Louisiana-Pacific Corp www.weatherbest.lpcorp.com.
WeatherBest solid composite decking, railings, and
Nexwood Industries Limited www.nexwood.com
Hollow composite decking and railing systems
TenduraPlank solid tongue-and-groove composite flooring
for porches; natural finish or primed for painting
Thermal Industries www.thermalindustries.com
Dream Composite solid tongue-and-groove composite
decking system with optional vinyl railings
TimberTech Limited www.timbertech.com
Floorizon hollow composite decking system, solid
composite decking planks, and optional railing system
Trex Company www.trex.com
Solid composite decking
Weyerhaeuser Building Products www.choicedek.com
ChoiceDeck solid composite lumber and optional railings
Plastic Decking Systems
Kroy Building Products www.kroybp.com
Classic Manor embossed vinyl decking with clip system
L.B. Plastics www.lbplastics.com
Sheerline interlocking vinyl decking system and deck
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 Steve Bliss's Building Advisor at buildingadvisor.com helps homeowners & contractors plan & complete successful building & remodeling projects: buying land, site work, building design, cost estimating, materials & components, & project management through complete construction. Email: email@example.com
Steven Bliss served as editorial director and co-publisher of The Journal of Light Construction for 16 years and previously as building technology editor for Progressive Builder and Solar Age magazines. He worked in the building trades as a carpenter and design/build contractor for more than ten years and holds a masters degree from the Harvard Graduate School of Education.
Excerpts from his recent book, Best Practices Guide to Residential Construction, Wiley (November 18, 2005) ISBN-10: 0471648361, ISBN-13: 978-0471648369, appear throughout this website, with permission and courtesy of Wiley & Sons. Best Practices Guide is available from the publisher, J. Wiley & Sons, and also at Amazon.com
 Mark Morsching, Everflashing, Tel: 800-550-1667, Email: firstname.lastname@example.org. The Everflashing product comes in G-185 and Stainless Steel and is intended for use with treated lumber with copper in it. Everflashing produces a variety of specialty flashing products including flashings for use with decks at deck ledgers and deck perimeters.
 Claudia Hudson, Asheville NC, Tel: 828-252-0644
Email: email@example.com . Ms. Hudson is an SEO copyrighter / content writer. She has provided background research and text for InspectApedia's articles on deck and porch construction methods & procedures. April 2013.
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