Deck Materials and Railings: Wood, Composite, PVC and the Frame Underneath

Most deck shopping starts with the boards: the color, the grain, the feel underfoot. The boards matter, but they sit on a frame that has to outlast them, and they are bordered by guards and stairs that carry the code requirements. A deck that pairs a 25-year surface with a frame that rots in fifteen, or a handsome railing on posts that were notched and toe-screwed, is not a good deck.

This guide works from the bottom up — the frame and its hardware, then the decking options, then railings — with typical Columbus installed prices taken from Deck Cost in Columbus, Ohio.

The frame comes first

Nearly every residential deck in Columbus, whatever its surface, is framed with pressure-treated lumber. The industry standard for treated wood was tightened in 2016: framing that is critical to the structure or difficult to maintain, repair or replace — joists, beams and the ledger board among them — should carry ground-contact treatment even when it sits well above the soil [1]. A composite surface rated for decades does not make sense on joists treated for a shorter life, so the treatment stamp on the framing is worth reading on a bid.

Many builders also apply joist tape over the tops of joists and beams. It sheds water from the fastener holes and the top surface where moisture otherwise sits under each board, which matters most under composite and PVC decking that keeps the frame shaded and slow to dry.

Treated lumber is corrosive to ordinary steel, so every connector and fastener in it needs a suitable coating. Simpson Strong-Tie, the largest connector maker, recommends its heavy-galvanized ZMAX or hot-dip galvanized products for decks and similar exterior treated-wood work, with stainless steel for higher exposure, and fasteners matched to the connector's coating [2]. Joist hangers, post bases and lateral load connector hardware are where a deck's long-term safety is decided; NADRA's homeowner checklist starts with corroded fasteners and decaying wood at the ledger, posts and joists [3].

Pressure-treated decking

Pressure-treated pine is the least expensive decking, at roughly $45 to $70 per square foot installed for a complete deck in Columbus. It is strong, widely available and easy to repair. It is also the most work to keep: treated boards check, split and cup as they dry, and they need a stain or sealer to slow weathering. Current guidance from a major treated-wood producer is to stain new decking within about six weeks of construction once it is dry enough — sprinkle water on the boards, and if it soaks in rather than beading, the wood is ready — rather than waiting the six months to a year once recommended [4]. After that, expect to clean and recoat every few years.

Cedar

Cedar decking, at roughly $50 to $75 per square foot installed, is lighter and more stable than treated pine, with natural decay resistance in the heartwood and a color many owners prefer. It is softer, so it dents and scratches more readily, and it needs a finish to keep its color; left bare it weathers to gray. Cedar is usually laid over a treated-pine frame, so the frame's durability still governs the deck's life.

Dense tropical hardwood (Ipe) and similar species are a premium alternative to cedar: extremely hard and long-lived, but expensive, heavy and slow to install, with every fastener pre-drilled.

Capped composite

Composite decking combines wood fiber and plastic in a core wrapped by a protective polymer shell — the "cap" — that resists staining and fading. Trex and TimberTech are the best-known brands. Installed Columbus prices run roughly $60 to $90 per square foot. Composite does not need staining; cleaning is usually enough. TimberTech's capped composite lines carry a 30-year limited fade and stain warranty [5].

Composite asks more of the frame than wood does. Trex specifies joists no more than 16 inches on center for standard installations and 12 inches when the boards run diagonally [6], so a resurfacing job on an old frame often needs added joists. Composite boards also expand and contract with temperature — thermal movement that installers handle with the manufacturer's gapping rules — and dark colors get noticeably hot in full summer sun. Hidden fastener clips give a clean surface without screw heads, and a picture frame border around the edge hides the cut board ends.

Capped polymer (PVC)

PVC or capped polymer decking contains no wood at all. TimberTech's AZEK line is made of 100 percent polymers in both core and cap, giving it the strongest resistance to moisture and weathering in the manufacturer's range, and it carries a 50-year limited fade and stain warranty [5]. PVC boards are lighter than composite and come in convincing wood looks, but they are the most expensive option — roughly $65 to $100 per square foot installed in Columbus — and they share composite's need for close joist spacing and careful gapping.

Decking side by side

Matching the material to the yard

The same material can be a good or a poor choice depending on where the deck sits. A few Columbus situations come up again and again:

• Shade and mature trees. Decks under the old maples and oaks of established neighborhoods stay damp longer and collect leaves and seed pods. Wood in deep shade grows mildew and decays faster; capped boards resist staining but still need regular washing, and the frame underneath dries slowly, which makes ground-contact framing and joist tape more important.
• Full sun on a south or west exposure. Dark composite and PVC boards can get uncomfortably hot for bare feet in July. Lighter colors, and the cooler-running product lines some manufacturers offer, are worth comparing in person on a sunny afternoon.
• Grills, fire features and pets. Grease, embers and claws mark every surface eventually. A grill mat and clearances from the manufacturer's instructions protect any decking; capped boards resist grease stains better than bare wood but can be scorched.
• Low decks close to the ground. A deck only a foot or two off the soil has little airflow beneath it. Wood framing there should be rated for ground contact, and the grade under the deck should slope away from the house so water does not pool.

Railings

Railing is often the largest upgrade on a deck, with installed prices spanning roughly $35 to $210 per linear foot [7]. The main families:

• Treated wood or cedar — the least expensive; balusters between a top and bottom rail. Needs the same finishing as the deck and loosens at the posts over time if poorly attached.
• Composite and PVC systems — sleeves over treated posts with matching rails and balusters; low upkeep and a consistent look with composite decking.
• Aluminum — powder-coated panels and posts; slim profiles, low upkeep, and a common choice for open views.
• Cable railing — horizontal stainless cables between sturdy posts; open views, but the cables must stay tensioned tightly enough that a 4-inch sphere cannot pass between them, which demands stiff end posts and periodic re-tensioning.
• Glass panels — the most open and usually the most expensive; heavy and dependent on the manufacturer's post and fastening system.

What the code asks of guards and stairs

Columbus applies the Residential Code of Ohio, and its building department summarizes the deck rules that matter most [8]:

• A guardrail at least 36 inches high is required wherever the deck surface is more than 30 inches above grade, measured three feet out from the edge — including along perimeter fixed seating.
• Stair risers can be no more than 8¼ inches high and treads no less than 9 inches deep; open risers are allowed if a 4-inch sphere cannot pass through.
• A handrail between 34 and 38 inches high is required on at least one side of any stair with four or more risers.
• The step from the house door down to the deck can be no more than 8¼ inches when the door does not swing out over the deck.

Franklin County's deck guide adds detail inspectors look for: guard balusters, cables or rails spaced so a 4-inch sphere cannot pass, riser heights within 3/8 inch of each other on a run, and a graspable handrail between 1¼ and 2¾ inches across with its ends returned [9]. Guards must also resist a 200-pound concentrated load [10] — which is why the attachment of each newel post and rail post to the frame, usually with through-bolts and blocking or rail post tension hardware, matters more than the look of the balusters.

Under, around and over the deck

• Under-deck drainage — gutters or membranes under the joists of an upper deck keep the space below dry enough for a patio. They are easiest to add during construction.
• Lighting — post caps, stair-riser lights and low-voltage strips improve safety at night; a new line-voltage circuit needs an electrical permit.
• Pergola and privacy screens — a pergola adds wind and uplift loads to the frame and is best designed with the deck rather than bolted on afterward.

What this means for your budget

On a typical Columbus deck, the move from pressure-treated pine to capped composite raises the installed price by roughly 20 to 35 percent, and PVC adds somewhat more. Railing can add as much again on a raised deck with long open edges. The frame and hardware underneath are not where savings belong: ground-contact framing, coated connectors and a sound ledger connection cost little relative to the whole and decide how long the deck lasts.

Have the decking and railing options priced on the same deck design so the difference shows up as a range rather than a guess. For the permit, footing and ledger rules behind any deck, read Permits, Footings and Code.