Choosing composite decking for your Des Moines home is the easy part. Choosing between Trex, TimberTech, and Azek is where it gets confusing. This guide breaks down the real cost differences, warranty terms, and Iowa weather performance so you can pick the right brand for your budget.
TLDR: Des Moines composite decking costs $20 to $80 per square foot installed depending on brand. Trex runs $20 to $62; TimberTech composite $40 to $70; AZEK PVC $60 to $80. Important clarification: AZEK is TimberTech’s premium PVC product line, not a separate company.
Understanding the Three Brands
AZEK and TimberTech are the same company. AZEK is TimberTech’s premium PVC line. When comparing “Trex vs TimberTech vs Azek,” you are really comparing:
- Trex: Wood-Plastic Composite (WPC), up to 95% recycled content
- TimberTech Composite (Edge/PRO): WPC, approximately 85% recycled
- TimberTech AZEK: 100% PVC with no wood fibers
The core difference: Trex and TimberTech composite contain wood fibers. AZEK does not. This affects moisture and mold resistance.
For a broader overview, see our guide to decking materials for Iowa homeowners.
Material Costs by Product Line
| Brand | Product Line | Materials Per Sq Ft | Warranty |
|---|---|---|---|
| Trex | Enhance Basics/Naturals | $5 to $7 | 25 years |
| Trex | Select | $7 to $9 | 35 years |
| Trex | Transcend/Lineage | $10 to $14 | 50 years |
| Trex | Signature | $12 to $16+ | 50 years |
| TimberTech | Edge Prime/Prime+ | $5.70 to $7.50 | 25 years |
| TimberTech | PRO (Reserve/Terrain) | $9 to $12 | 30 years |
| TimberTech AZEK | Harvest/Landmark/Vintage | $11 to $19 | Lifetime/50yr |
Note: Trex raised railing and fastener prices effective January 1, 2026.
Total Installed Costs in Des Moines
| Brand | Installed Cost Per Sq Ft | 12×12 Deck (144 sq ft) | 16×20 Deck (320 sq ft) |
|---|---|---|---|
| Trex (Des Moines)* | $20 to $62 | $2,360 to $4,800 | $5,100 to $10,540 |
| TimberTech Composite** | $40 to $70 | $5,800 to $10,100 | $12,800 to $22,400 |
| TimberTech AZEK** | $60 to $80 | $8,650 to $11,500 | $19,200 to $25,600 |
*Trex figures are Des Moines metro specific from local contractor data. **TimberTech and AZEK figures are national averages. Des Moines installed costs may be 15 to 20% lower due to regional labor rates.
Des Moines labor runs $10 to $20 per square foot, below coastal markets. Most Trex projects fall in the $25 to $40 range installed.
Illustrative scenario: A 12×16 Trex Enhance deck in Urbandale at $30/sq ft = approximately $5,835 with permit.
Illustrative scenario: A 12×16 AZEK Landmark deck in West Des Moines at $70/sq ft = approximately $13,515 with permit.
For estimating guidance, see our guide to deck construction estimates.
Iowa Weather Performance
| Feature | Trex (WPC) | TimberTech Composite | AZEK (PVC) |
|---|---|---|---|
| Scratch Resistance | Superior (premium) | Good | Excellent |
| Heat Retention | Higher | Higher | Lower (10-15 degrees cooler*) |
| Moisture/Freeze-Thaw | Very Good | Good | Superior |
| Mold Resistance | High | High | Highest |
| Iowa Climate Rating | Excellent | Excellent | Best |
All three handle Iowa winters far better than wood. Composite does not absorb water like wood, so freeze-thaw damage is minimal.
Heat matters in Iowa summers. Composite can be 35 to 76 degrees hotter than air temperature. Independent testing shows AZEK PVC stays 10 to 15 degrees cooler than standard composites in direct sun. TimberTech claims up to 30 degrees cooler than competing products. Trex Select and Lineage both include heat-mitigating “SunComfortable” technology. For south-facing decks, choose lighter colors or consider AZEK, Select, or Lineage.
*Heat performance varies by color, sun exposure, and testing conditions.
For Iowa-specific design tips, see our deck design ideas and maintenance guide.
How to Choose by Budget and Priority
| Your Priority | Best Choice | Why |
|---|---|---|
| Lowest cost | Trex Enhance or TimberTech Edge | $5 to $7.50/sq ft materials |
| Best scratch resistance | Trex Transcend/Signature | Industry-leading surface hardness |
| Best moisture/mold defense | AZEK | No wood fibers, 4-sided cap |
| Stays coolest | AZEK or Trex Select/Lineage | PVC cooler; Select and Lineage have heat tech |
| Best sustainability | Trex | 95% recycled content |
| Longest warranty | AZEK | Lifetime + 5-year labor reimbursement |
| Best value | Trex Select | 35-year warranty at mid-range price |
Always verify your contractor is registered with Iowa Division of Labor. Check the Iowa Attorney General Consumer Protection Division before signing.
Frequently Asked Questions
How much does composite decking cost in Des Moines? Trex installed runs $20 to $62 per square foot, most projects $25 to $40. TimberTech composite costs $40 to $70. AZEK costs $60 to $80. Des Moines labor is 15 to 20% below coastal markets.
What is the difference between TimberTech and AZEK? AZEK is TimberTech’s premium PVC product line. TimberTech also makes composite (Edge/PRO) that contains wood fibers. AZEK is 100% PVC with no wood fibers, offering superior moisture resistance.
Is Trex or TimberTech better for Iowa weather? Both handle Iowa far better than wood. For maximum freeze-thaw and moisture protection, AZEK’s wood-free PVC is technically superior. For scratch resistance and value, Trex is excellent. Both are strong choices.
Does composite decking get hot in Iowa summers? Yes. Composite can be 35 to 76 degrees hotter than air temperature. Independent testing shows AZEK stays 10 to 15 degrees cooler than standard composites. TimberTech claims up to 30 degrees cooler. Trex Select and Lineage include heat-mitigating technology. Choose lighter colors for south-facing decks.
What warranty does Trex offer in 2026? Trex Enhance: 25 years. Trex Select: 35 years. Trex Transcend/Lineage/Signature: 50 years. AZEK offers lifetime structural plus 50-year fade/stain plus 5-year labor reimbursement.
Is AZEK worth the extra cost? AZEK costs 50 to 100% more than comparable Trex. Worth it if you prioritize moisture/mold resistance, cooler surface, realistic appearance, and lifetime warranty. Trex premium lines offer 50-year warranties at lower cost with superior scratch resistance.
Key Takeaways
- AZEK is TimberTech’s premium PVC line, not a separate company
- Des Moines installed costs: Trex $20 to $62; TimberTech $40 to $70; AZEK $60 to $80
- All three brands handle Iowa freeze-thaw far better than wood
- For hot south-facing decks, choose lighter colors or AZEK/Trex Select/Lineage
- Trex Enhance and TimberTech Edge offer best budget value
Ready to Choose Your Composite Decking?
Busy Builders has helped over 1,000 Central Iowa homeowners since 2020. We build decks throughout Des Moines, West Des Moines, Ankeny, Waukee, and surrounding communities.
Call: 844-435-9800
Website: https://busybuildersiowa.com/
Disclaimer: All cost figures are estimates based on published manufacturer pricing and regional market data as of early 2026. Actual costs vary by project and contractor. This guide is for informational purposes only. Busy Builders Iowa is not exclusively affiliated with Trex, TimberTech, or AZEK. Brand names are used for comparison purposes. Warranty terms are based on manufacturer information as of February 2026 and may change; verify directly with manufacturers. Performance statements are based on manufacturer claims and published comparisons. Consult with a registered Iowa contractor before beginning any project.
Busy Builders | Full-Service Construction and Remodeling | Serving Central Iowa Since 2020
