40 Percent Lighter
2 Times Stronger
Every Board is Unique

The I-Series Impact

  • Stronger - 2x the strength of competitive options
  • Straighter - Rigid under foot at 16" O.C. means no bounce or sagging between joists
  • Prettier - Available in a wide range of earth-tone colors
  • Greater - Advanced geometric design for improved mechanical properties
  • Cooler - Improved heat dissipation
  • Lighter - Easy to handle and carry at 1.85 lbs per foot
  • Safer - Slip-and-splinter resistant
  • Cheaper - A cost-effective deck option without sacrificing performance
  • Smarter - The unique shape delivers enhanced ventilation for less debris build up between boards
  • Character - Natural hardwood look (repeated grain pattern is a thing of the past!)


Try our new visualizer tool!

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Actual product color may vary from the images shown due to differences in resolution and lighting.

Cape Town Grey Deck Board

Cape Town Grey

Caribbean Coral Deck Board

Caribbean Coral

Oasis Palm Deck Board

Oasis Palm

Tiger Cove Deck Board

Tiger Cove

Cape Town Grey
Caribbean Coral
Oasis Palm
Tiger Cove
Cape Town Grey Deck Scene Caribbean Coral Deck Scene Oasis Palm Deck Scene Tiger Cove Deck Scene



Visit the Sales Sheet for more details. Plus check out our cladding products to learn how our boards can be used on a wall.

Grooved Infinity I-Series boards install with hidden clips beneath the deck surface. Square Infinity I-Series install with surface mounted color-match deck screws.

Grooved Profile

Grooved Board

Specs: 5.35" (136mm) x 1" (25mm) x 12'/16'/20' (366cm/488cm/610cm)

Grooved Board Profile

Starter Board Profile

Starter Board

Specs: 5.35" (136mm) x 1" (25mm) x 16' (488cm)

Starter Board Profile

Square Board Profile

Squard Board

Specs: 5.5" (140mm) x 1" (25mm) x 20' (610cm)

Square Board Profile

Fascia Board Profile


Brushed surface fascia boards used for trim around decking and stair risers.

8" Fascia/Riser (203mm)

Specs: .65" (17mm) x 7.25" (184mm) x 12' (366cm)

12" Fascia (305mm)

Specs: .75" (19mm) x 11.75" (298mm) x 12' (366cm)

8" Fascia Board Profile

12" Fascia Board Profile

Infinity® I Series Case Studies

Quail Ridge

See how our Infinity® I Series Capped Bamboo-Plastic Composite Decking is lowering maintenance and making a lasting impression for this multifamily project.

View the Case Study

Powder-Coated Materials

Explore more about how our Infinity® I Series Capped Bamboo-Plastic Composite Decking provides a solution that will stand the test of time for this apartment project.

View the Case Study

Get To Know Infinity I-Series

Play Video

I-Series Installation Video

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Fortress Building Products Decking

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Resources & Downloads

About California Proposition 65
  • Warranty
  • Literature
  • CEU Training
  • Coordinating End Paint

You're Covered

Historically, fortresses were built to protect. The same is true of Fortress Building Products. You can expect coverage the second you decide to embark on your journey with us. We cover our products and the people who buy them. At Fortress, we don’t just stand behind our work ... we stand by your side.

Go To Warranty

Read All About It

Check out our beautiful, informative literature to learn all about our decking products. Be briefed by brochures, stirred by sales sheets, captivated by catalogs and motivated by other marketing elements.

Go To Sales Sheet

Best In Class

These brief courses are designed to help you learn about Fortress products, and gain the in-depth knowledge you need to confidently sell them. Register for an online training course or request a live in-person training.

Go To Courses

Get The Color

Looking to add the finishing touch to your decking project? Consider one of the matching Sherwin Williams paint colors. This will ensure end-cut color consistency for each Fortress board, no matter the shade you fall in love with. Download the spec sheet below.

Download Colors


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