Cut Cost, Not Quality

Fortress set out to prove that cost-effective decking could still deliver the strength, usability and beauty of its premium cousins. Well, we did that and more.

Our new I‑Series decking is 40% lighter, while keeping the same stiffness and mechanical properties. This revolutionary design uses the historically proven I-beam shape, which is uniquely capable of handling heavy loads.

40 Percent Lighter
2 Times Stronger
Every Board is Unique

Key Features

  • Natural hardwood look (repeated grain pattern is a thing of the past!)
  • A cost-effective deck option without sacrificing performance
  • 2x the strength of competitive options
  • Available in a wide range of earth-tone colors
  • Advanced geometric design for improved mechanical properties
  • Unprecedented span rating
  • Improved heat dissipation
  • Easy to handle and carry
  • Lightweight at 1.85 pounds per foot
  • Category leading slip resistance
  • Enhanced ventilation
  • Rigid under foot at 16” o.c.


Tiger Cove Deck Board

Tiger Cove

Cape Town Grey Deck Board

Cape Town Grey

Caribbean Coral Deck Board

Caribbean Coral

Oasis Palm Deck Board

Oasis Palm

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


Fascia Decking

Brushed surface fascia boards used for trim around decking and stair risers.
0.61”h x 7.25”w x 12’l
0.71”h x 11.75”w x 12’l

Modern Rail

Fully capped modern rails in variegated premium colors for use with Fortress Railing Balusters.
1.5”h x 3.5”w x 8’l

Stair Tread

Dual-surfaced stair tread boards for a finished premium interior stair look.
1.18”h x 12.8”w x 12’l

Post Sleeve

Fully capped post sleeves in variegated premium colors for use with 4” x 4” lumber.
5”h x 5”w x 120”l