Trex vs TimberTech: which decking fits a Boise deck?

How do Trex and TimberTech compare overall?

At the same tier the two brands are close; the bigger differences are in fire ratings, capping and how each one handles heat. Everything in the table comes from the manufacturers' own product and warranty pages, read in October 2026, except the cost row.

Line by line: what each brand sells

Each brand stacks several lines by price. Matching tiers across brands is the fair comparison: Trex Enhance against TimberTech Edge, Trex Transcend against TimberTech Pro, and TimberTech's AZEK PVC against Trex's Refuge PVC.

When Trex makes more sense

Trex fits when you want the widest spread of composite tiers under one name, or you are matching an existing Trex deck. Its entry and middle lines cover most budget-driven projects in the valley.

• Budget first: Enhance carries a 25-year warranty and Select 35 years, at the low end of composite pricing.
• Heat with composite: Trex lists heat-mitigating technology in several Enhance colors and in Transcend Lineage, so you can stay in composite rather than moving to PVC.
• Extending an existing Trex deck: stay within compatible lines. Trex notes that Select boards are slightly thinner and should not be mixed with Enhance, Transcend, Signature or Refuge.
• Recycled content: Trex composite is built mostly from reclaimed material, which the company puts at 95% recycled plastic film plus reclaimed sawdust.

Trex also lists a separate TrexPro labor warranty tied to its contractor program, alongside the product warranties; read both before you sign.

When TimberTech makes more sense

TimberTech fits when capping, fire ratings or a PVC option from the same family matter most. Its tiers make the moisture and fire differences explicit, which helps when you need a specific rating.

• Four-sided capping: Pro collections such as Reserve are capped on all four sides, including the grooves, where Edge boards are capped on three.
• Fire zones: AZEK Vintage and Landmark carry Class A flame spread and an Ignition Resistant designation; Harvest is Class B and WUI compliant.
• Hot tubs and low, damp decks: Advanced PVC has no wood fiber in the board, so the AZEK tier suits constant moisture.
• Longest coverage: AZEK Vintage and Harvest carry a limited lifetime product warranty and 50-year fade-and-stain coverage.

Which brand handles Boise heat better?

Neither claim settles it, because each brand measures against a different baseline. Trex says SunComfortable boards build up to 35°F less heat than its own original boards; TimberTech says its Advanced PVC stays up to 30 degrees cooler than other composite decking. Both add that all decking gets hot in direct sun and that darker colors run hotter.

That caution matters in Boise, where July highs average 92.7°F and the thermometer hits 90°F on about 55 days in a typical year (NOAA normals). Order samples of the exact colors you are considering, set them in full afternoon sun on a hot day and touch them at 3 p.m. Light colors and shade beat any single technology. The full-sun decking guide goes further.

Which is the safer pick for the Foothills wildfire overlay?

On published, current paperwork, TimberTech has the clearer record for wildfire zones. The California State Fire Marshal's building materials listing 8110-2042:0502 covers TimberTech Pro Reserve grooved composite decking under test protocol SFM 12-7A-4A, issued May 31, 2026 and valid through June 30, 2027. TimberTech also publishes Class A and Ignition Resistant ratings for AZEK Vintage and Landmark.

For Trex, the copies of the Trex Select WUI listing we could find (8110-2052:0005) expired June 30, 2024. That does not mean Select fails a fire test; it means we could not confirm a current listing. Trex now markets Refuge PVC as its ignition-resistant board. If you build in Boise's IR1 area, ask for the current listing for the exact product and confirm with Boise Fire what applies; a California listing is evidence of testing, not an Idaho approval. See wildfire-resistant decking for the Foothills.

Other Treasure Valley factors

• Local stock: Trex notes that material costs vary with whether a product is stocked locally, and TimberTech notes availability can differ by market. A line a Boise yard does not carry adds lead time.
• HOA approvals: colors differ between brands, so submit the exact product and color name to your architectural committee.
• Freeze-thaw: Boise sees 108 freezing nights a year. Both brands' capped boards resist moisture, but the frame underneath is still wood.
• Framing: both brands publish joist-spacing limits by line; confirm them before framing, especially for diagonal layouts.

For prices by size and height, see the composite deck cost guide; for PVC against composite, see composite vs PVC decking. Our composite decks service covers installation.