If you're weighing composite deck vs. pressure treated wood for your Cary home in 2026, here's the short version: composite will cost you roughly double upfront but saves thousands over 25 years in maintenance and replacement, while pressure treated wood runs about $15 to $25 per square foot installed and demands staining every two to three years. The right choice depends on your budget, your tolerance for weekend projects, and how long you plan to stay in your house. Let's break down the real numbers, the climate realities of McHenry County, and what Burns Carpentry sees on the ground every season.
Upfront Cost Breakdown: Composite Decking vs. Pressure Treated Wood in Cary, IL (2026)
For a typical 300 square foot deck in Cary, pressure treated wood runs $4,500 to $7,500 installed. That's $15 to $25 per square foot including materials and labor. Composite decking for the same size starts around $9,000 and goes up to $15,000 installed, or $30 to $50 per square foot. The gap has narrowed slightly in 2026 as lumber prices stabilized and composite manufacturers introduced more competitive mid tier lines like TimberTech Edge and Trex Select.
The price difference comes down to material cost and installation complexity. Pressure treated lumber is cheap and readily available at any lumber yard in the Chicago suburbs. Composite boards cost more to manufacture and require specialized fasteners hidden clips and expansion gaps that add labor time. A Burns Carpentry crew can frame and deck a standard wood deck in about a week, while a composite deck of the same size takes closer to two weeks because each board needs precise spacing and the substructure often requires additional joists to meet manufacturer deflection requirements.
Here's a hidden cost most homeowners miss: the substructure. If you're building a composite deck, the framing needs to be perfectly level and spaced at 12 inches on center instead of the 16 inches allowed for wood. That means more lumber, more labor, and potentially a deeper foundation. Burns Carpentry always includes a full structural assessment in every free estimate, so you know exactly what your deck's foundation requires before you commit to a material.
Long Term Maintenance and Care: What Each Material Really Requires
Pressure treated wood demands attention every single year. You should power wash and apply a water repellent sealer every spring, and a full stain or solid color coating every two to three years depending on sun exposure. A 300 square foot deck takes about four to six hours to clean and seal, plus roughly $150 to $300 in supplies. Over 20 years, that's $3,000 to $6,000 in materials alone, not counting your time or the cost of hiring a professional to do it right.
Composite decking eliminates almost all of that. You wash it once or twice a year with a garden hose and mild soap. No sealing, no staining, no sanding. The trade off is that composite can trap heat in direct summer sun, so dark colors can get too hot for bare feet in July and August. Burns Carpentry recommends lighter gray or tan tones for Cary homes with western or southern exposure, and we always leave manufacturer specified expansion gaps to prevent buckling during our hot humid summers.
There's also the question of repair. A damaged wood board costs $15 to $30 to replace and any decent DIYer can swap it out in an afternoon. A damaged composite board costs $40 to $80 plus the labor to remove hidden fasteners and reinstall with the same precision. Burns Carpentry stocks matching composite boards from all major manufacturers for exactly this reason, so if a branch falls or a grill flare up damages a section, we can match the color and texture even years later.
Lifespan and Durability in Cary's Climate: Which Deck Material Lasts Longer?
Cary gets the full Illinois weather package: humid summers that hit 90 degrees with dew points in the 70s, freezing winters with snow and ice, and freeze thaw cycles that can crack concrete and warp wood. Pressure treated wood in this climate typically lasts 10 to 15 years before it starts showing significant rot, warping, or splintering. With meticulous annual maintenance, you might push that to 20 years, but most homeowners in McHenry County are looking at replacement around year 12 to 15.
Composite decking is built for these conditions. Modern capped composites have a PVC shell that resists moisture, UV rays, and mildew. Manufacturers like Trex and TimberTech warranty their capped boards for 25 to 50 years against fading, staining, and structural defects. In real world conditions in Cary, a well installed composite deck will easily outlast the house's original siding. Burns Carpentry has replaced dozens of 15 year old Wood Decks in Cary neighborhoods like Oakwood Hills and Cary Grove, but we've never replaced a properly installed composite deck that was less than 20 years old.
The weak point for composite is always the substructure. The deck boards themselves are nearly indestructible, but if the wood framing underneath rots, the whole deck is compromised. That's why Burns Carpentry uses pressure treated or galvanized steel framing for all composite deck builds, and we include a two year workmanship warranty that covers any issue with the substructure or installation. We also recommend annual inspections of the joists and ledger board, something we include free with any repair or maintenance visit.
ROI and Resale Value: How Each Deck Type Impacts Your Cary Home's Worth
A well built deck of any material adds value to a Cary home. The National Association of Realtors estimates a wood deck returns roughly 65 to 75 percent of its cost at resale, while a composite deck returns 70 to 80 percent. The difference seems small until you do the math. A $6,000 wood deck adds about $4,200 to $4,500 in home value. A $12,000 composite deck adds $8,400 to $9,600. The composite deck costs more upfront but delivers a higher absolute return.
More importantly, Composite Decks sell faster. Real estate agents in the Chicago suburbs consistently report that composite decks are a top three feature buyers ask for, right behind updated kitchens and finished basements. Buyers see composite and mentally subtract years of weekend maintenance from their future. They know they won't have to seal a composite deck every spring, and that's a selling point that shows up in offer prices. Burns Carpentry has built composite decks for homeowners in Arlington Heights, Palatine, and Schaumburg who were actively preparing to sell within two years, and every one of those sellers reported that the deck was the first thing buyers commented on during showings.
If you plan to stay in your Cary home for more than 10 years, composite almost always wins the ROI calculation. The breakeven point comes around year 8 to 10, when a wood deck owner would have spent enough on maintenance and eventual replacement to match the composite premium. After that, composite is pure savings. If you're only planning to stay 3 to 5 years, pressure treated wood is the smarter financial play because you'll capture the resale value without paying the composite premium yourself.
Which Deck Material Is Right for Your Cary, IL Home? A Decision Checklist
Here's a practical decision framework that Burns Carpentry uses with every client during the initial consultation:
- Budget range: If your hard maximum is under $8,000 for a 300 square foot deck, pressure treated wood is your only realistic option. If you can stretch to $10,000 or more, composite becomes viable, especially if you choose a mid tier product line.
- Maintenance tolerance: Be honest. If you hate the idea of spending a Saturday every spring staining and sealing, composite is worth the premium. If you actually enjoy woodworking and see deck maintenance as a hobby, pressure treated wood gives you a canvas to customize.
- Time in home: Staying 10 years or more? Composite pays for itself. Moving in 5 years or less? Wood is the financially prudent choice.
- Sun exposure: South or west facing decks in Cary get brutal afternoon sun. Dark composite can reach 140 degrees on a July afternoon. Light colored composite or wood with a reflective stain is more comfortable for barefoot use.
- HOA or village restrictions: Some Cary subdivisions have specific requirements for deck materials or colors. Burns Carpentry handles all permit applications with the Cary municipal offices and can tell you exactly what's allowed before you start shopping.
If you're still undecided, visit a showroom and touch both materials. Burns Carpentry keeps sample boards of all major composite brands and wood grades at our shop. We'll walk you through the feel, the color options, and the exact cost difference for your specific deck dimensions. There's no pressure and no sales pitch, just honest advice based on 15 years of building decks that survive Cary winters.
Frequently Asked Questions
Does composite decking get too hot for dogs in Cary summers?
Yes, dark colored composite can heat up significantly in direct sun. On a 90 degree July day in Cary, a dark gray composite deck can reach 130 to 140 degrees, which is uncomfortable for dog paws. Light tan, beige, or gray tones stay 15 to 20 degrees cooler. Burns Carpentry recommends lighter shades for homes with pets or young children, and we always discuss sun exposure during the design phase.
Can I build a composite deck over an existing wood deck?
Sometimes, but only if the existing substructure is in excellent condition and meets composite manufacturer joist spacing requirements. Most composite brands require joists at 12 inches on center, while older wood decks are often framed at 16 inches. Burns Carpentry will inspect your existing deck during a free estimate and tell you whether a composite overlay is feasible or if a full rebuild is needed.
How much does it cost to replace a wood deck with composite in Cary?
Expect to pay $30 to $50 per square foot for a full tear out and composite replacement, depending on the complexity of the old deck's removal and disposal. For a typical 300 square foot deck, that's $9,000 to $15,000. Burns Carpentry handles the entire process, including hauling away the old materials and managing the permit application with McHenry County.
What's the best time of year to build a deck in Cary?
Late spring through early fall, specifically May through September, gives the best weather for concrete footings and sealant curing. Burns Carpentry schedules most deck projects between April and October, with a typical three to five week timeline from initial consultation to completion. Winter builds are possible but require extra precautions for concrete curing in freezing temperatures.
If you're ready to compare real quotes for your Cary deck project, Burns Carpentry offers free estimates with no obligation. We'll walk your property, take measurements, discuss your material preferences, and give you a detailed breakdown of composite versus wood costs for your specific home. Call us or schedule a visit through our website. We'll tell you straight up which material makes sense for your budget and your timeline.
