TimberTech decking

What to know about TimberTech and AZEK before signing a quote

AZEK Building Products (formerly CPG / TimberTech) was taken private by Madison Dearborn Partners in 2013 and went public again in 2020 (NYSE: AZEK). The company operates two complementary decking brands: AZEK Exteriors — 100% cellular PVC decking sold under the AZEK name — and TimberTech — capped composite decking sold under the TimberTech PRO and TimberTech EDGE labels. Both brands share manufacturing facilities and warranty infrastructure, which is why they are often quoted together and why the warranty documents reference both names.

The product hierarchy runs from TimberTech EDGE (entry capped composite, three-sided cap) through TimberTech PRO (premium capped composite, four-sided cap) to AZEK Vintage and AZEK Landmark (full cellular PVC). The critical difference between composite and cellular PVC is moisture behavior: capped composite still has a wood-fiber core that can theoretically absorb moisture if the cap is damaged; cellular PVC has no organic material at all, making it 100% moisture-proof throughout the board — not just at the surface. That matters in high-humidity coastal climates, around pools, and on decks close to grade.

TimberTech PRO and AZEK carry a 30-year fade and stain warranty plus a 30-year structural warranty — longer than Trex's 25-year coverage on both counts. AZEK adds a 30-year 'no rot' structural guarantee on cellular PVC boards. These are marketed as lifetime-equivalent for a typical homeowner's ownership period, and the company's financial backing (a publicly traded large-cap building products company) lends credibility to long-dated warranty claims.

Product tiers

Each TimberTech product sits in one of these tiers. Prices shown are directional per square foot installed (material plus labor) and vary by market, deck complexity, and contractor; get multiple quotes before treating any figure here as binding.

What the warranty really covers

TimberTech PRO and AZEK carry the longest warranties in the mainstream composite/PVC decking market — 30 years on both stain/fade and structural coverage. But the headline numbers have important conditions that determine whether a claim will pay out.

The 30-year Limited Fade and Stain Warranty on TimberTech PRO and AZEK covers color change exceeding 5 Delta E units and staining not removable with approved cleaners. Like Trex, labor for removal and reinstallation is excluded from the warranty payout — AZEK/TimberTech will credit replacement material or issue a repair allowance, not write a check for labor. The 30-year period applies only to the original homeowner; the warranty transfers once to a subsequent homeowner within the warranty period, which is more generous than Trex's 10-year transfer window.

AZEK cellular PVC boards also carry a specific 'no rot' structural warranty, which reflects PVC's inherent advantage over composite: since there is no wood fiber to rot, the guarantee is essentially a manufacturing-defect warranty. TimberTech EDGE (three-sided capped composite) carries a 25-year warranty rather than 30 years — the upgrade to PRO adds 5 years plus the PermaTech four-sided cap. Both warranties require installation per AZEK/TimberTech published installation guidelines, including correct gap spacing for thermal expansion — a detail that matters more for AZEK PVC than for composite.

• 30-year coverage vs. industry standard 25
  TimberTech PRO and AZEK Vintage/Landmark carry a 30-year fade/stain and structural warranty — five years longer than the standard 25-year warranties from Trex. For a long-term homeowner, this is a real differentiator.
• Transfer at any time during warranty period
  Unlike Trex (10-year transfer window) or some other brands, TimberTech and AZEK warranties are transferable to a subsequent homeowner at any point during the 30-year warranty period. This can enhance resale documentation on high-end deck projects.
• Labor still excluded
  Neither the TimberTech PRO nor AZEK warranty covers the cost of removing defective boards, disposing of them, or reinstalling replacements. This is an industry-wide limitation but a significant out-of-pocket exposure — $1,500–3,000+ on a mid-size deck.
• Gap spacing is a coverage condition
  AZEK cellular PVC expands and contracts significantly with temperature (more than composite). Failure to maintain the end-gap and side-gap specified in the AZEK installation guide can cause board buckling and will likely void the structural warranty on the affected boards.

What TimberTech and AZEK do differently

The AZEK/TimberTech platform's primary differentiator is offering both cellular PVC and capped composite under one warranty infrastructure. A homeowner can choose composite for the main deck field and AZEK PVC for a wet bar area or poolside section that needs maximum moisture resistance — and deal with a single manufacturer for both warranty contacts.

TimberTech PRO's PermaTech four-sided cap is one of the more durable cap formulations in the capped composite market, and the 30-year warranty term on PRO and AZEK is longer than any mainstream competitor's. For homeowners who plan to own their home for 20+ years and want the most defensible long-term warranty available from a financially stable company, the AZEK/TimberTech platform is a strong choice.

• PermaTech four-sided cap (TimberTech PRO)
  TimberTech PRO's polymer cap covers all four sides of the board, including the bottom. This is more moisture-protective than three-sided capped composites and extends the structural integrity in wet environments. The four-sided cap is backed by the 30-year warranty rather than the industry-standard 25.
• Cellular PVC option (AZEK)
  AZEK is 100% cellular PVC — no wood fiber. This makes it the most moisture-proof decking product in the TimberTech/AZEK portfolio, with no organic content to support mold growth or rot. The tradeoff is higher cost, greater thermal expansion, and similar heat retention to dark composite boards.
• Cortex hidden fastener system
  Cortex uses a specialized screw that countersinks into the board face, with a matching color plug pressed into the hole to hide the fastener. No edge groove required on the board. This is a different approach than clip-based systems — it works with solid-edge boards and is available in all TimberTech/AZEK board colors.
• 30-year warranty on PRO and AZEK
  The longest warranty in the mainstream composite/PVC decking market — five years beyond the standard Trex or Fiberon warranty at comparable price tiers. Backed by a publicly traded company with significant balance sheet resources.

Who TimberTech fits

TimberTech PRO and AZEK fit homeowners who prioritize long-term durability and warranty coverage and are willing to pay a premium for it. Here is where the AZEK/TimberTech platform shines versus where a competitor may be the better fit.

• Homeowners in coastal, humid, or high-moisture climates
  AZEK cellular PVC has no organic content whatsoever. In salt-air environments, poolside applications, and climates with persistent humidity, the absence of wood fiber is a material advantage over capped composites where a scratched or worn cap can allow moisture ingress into the core.
• Homeowners who plan to own the home 20+ years
  A 30-year fade/stain and structural warranty from a large-cap publicly traded manufacturer is the most defensible long-term coverage available in this product category. For a 10-year horizon, the 5-year premium over competitors matters less.
• Homeowners building premium decks with mixed-use zones
  Pairing TimberTech PRO composite (main deck field) with AZEK PVC (wet bar, around a pool, steps) under one warranty umbrella simplifies long-term coverage. Other brands don't offer this composite-plus-PVC ecosystem at scale.

Where TimberTech may not fit

TimberTech and AZEK are premium products at premium prices. These are the honest tradeoffs and scenarios where another brand may be a better fit.

• Higher cost than Trex or Fiberon at comparable tiers
  TimberTech PRO and AZEK consistently quote higher per sq ft installed than Trex Transcend or Fiberon Promenade at comparable aesthetic tiers. The 30-year warranty justifies some of that premium for long-term owners, but if budget is constrained, the 5-year warranty extension may not be worth the additional cost.
• AZEK cellular PVC has high thermal expansion
  Cellular PVC expands and contracts significantly more than wood or composite with temperature changes. AZEK publishes detailed gap tables (end gaps and side gaps by board temperature at install) that must be followed precisely. An installer who treats AZEK like composite will likely produce a buckled deck in summer. Confirm your contractor has specific AZEK PVC installation experience.
• Heat retention similar to composite
  AZEK PVC boards get just as hot in full sun as dark composite boards — cellular PVC does not have a thermal advantage over capped composite. If barefoot comfort in direct sun is a priority, lighter colors in either material help significantly, but no current mainstream decking brand is immune to summer heat gain.
• TimberTech EDGE three-sided cap is entry-grade
  The EDGE tier is competitive in price but uses a three-sided cap, leaving the bottom face as exposed wood fiber. The warranty is 25 years rather than the 30-year PRO/AZEK coverage. If you are comparing quotes, make sure the contractor specifies EDGE or PRO — they are not the same product despite sharing the TimberTech brand name.

TimberTech FAQ

• What is the difference between TimberTech PRO and AZEK decking?
  TimberTech PRO is capped composite — a wood-fiber and recycled plastic core wrapped in a four-sided PermaTech polymer cap. AZEK is 100% cellular PVC — no wood fiber, no organic material. AZEK is completely moisture-proof through the entire board; TimberTech PRO has a moisture-resistant cap but a wood-fiber core underneath. AZEK also expands and contracts more with temperature, requiring precise gap spacing at install. AZEK typically costs $5–15 more per installed sq ft than TimberTech PRO but is the right choice in high-moisture environments.
• Does TimberTech or AZEK get hot in direct sun?
  Yes — both materials retain heat in direct sun, similar to other composite and PVC decking brands. Dark AZEK and TimberTech PRO colors can reach 130–155°F on a hot summer day. AZEK cellular PVC does not have a thermal advantage over capped composite despite being a different material. Lighter colors across both brands stay meaningfully cooler. If heat retention in full sun is a primary concern, compare Deckorators' mineral-based composite, which the company markets as having lower thermal gain.
• What is the Cortex hidden fastener system?
  Cortex is AZEK/TimberTech's proprietary hidden fastener system. Unlike clip-based systems (like Trex Hideaway), Cortex uses a specialized screw that countersinks into the board face. A matching PVC plug, color-matched to the board, is then pressed into the hole — completely hiding the fastener. No edge groove is required on the board. Cortex works on both TimberTech PRO and AZEK boards and is available in all TimberTech/AZEK board colors.
• Is the 30-year TimberTech warranty transferable to a new owner?
  Yes — the TimberTech PRO and AZEK warranties are transferable to a subsequent homeowner at any point during the 30-year warranty period. This is more flexible than Trex's 10-year transfer window. The transfer requires registering the warranty transfer with AZEK Building Products. Verify the original homeowner registered the warranty at install — an unregistered warranty may not be transferable.
• Can AZEK cellular PVC be used near a pool or in ground contact?
  AZEK cellular PVC is appropriate for poolside use — the board contains no organic material that can absorb pool chemicals or moisture. It is not rated for actual ground contact (buried in soil) by most building codes, but it can sit very close to grade, touch concrete, or be exposed to poolside splash and chemical spray without material degradation. TimberTech PRO capped composite is appropriate for poolside use with normal precautions but should not be exposed to high concentrations of pool chemicals on a regular basis.
• How does TimberTech PRO compare to Trex Transcend?
  Both are premium four-sided capped composites with similar installed cost ranges. TimberTech PRO's primary advantages are the 30-year warranty (vs. Trex's 25-year) and the transfer window (any time during warranty vs. Trex's 10-year limit). Trex's advantages are broader retail availability and a larger contractor install base. Aesthetically, the lines overlap significantly — both offer 15–20 colors with realistic woodgrain embossing. The 30-year warranty is the clearest reason to choose PRO over Transcend for a long-term homeowner.