KLAASWOOD Vertical Grain Siding

AESTHETIC EXCELLENCE MEETS CLASS 1 DURABILITY

KLAASWOOD Modified Vertical Grain Southern Yellow Pine is a premium quartersawn product curated to meet the aesthetic desires of architects, designers, and homeowners while offering natural enhanced stability and exceptional performance. 

The quartersawn cut produces a uniform pinstripe grain appearance prized in high-end residential and commercial projects. When combined with KLAASWOOD’s modification process, the result is a product that delivers superior dimensional stability, Class 1 durability, achieving a 25+ year lifespan, and the refined aesthetic demanded by today’s design professionals.

KEY BENEFITS:

  • Aesthetic Appeal
    • Uniform pinstripe grain appearance from quartersawn cutting
    • Clean, consistent visual presentation valued by architects and designers 
    • Accepts paint, stain, and color finishes for design flexibility
  • Enhanced Stability
    • Natural dimensional stability from quartersawn orientation 
    • Further improved through KLAASWOOD’s modification process
    • Reduced warping, cupping, and twisting compared to flat-sawn lumber
  • Class 1 Durability
    • Achieves 25+ year lifespan without chemical treatments
    • Modified to resist rot and decay
    • Suitable for exterior applications in demanding environments
  • Made in USA
    • Sourced, modified, and manufactured domestically
    • Supports American forestry and manufacturing\
    • Consistent quality and supply chain reliability

APPLICATIONS:

  • Exterior siding for residential and commercial
    projects
  • Trim and fascia for architectural detailing
  • Premium decking for outdoor living spaces
  • Interior accent walls and ceilings
  • Specialty millwork and custom applications

AVAILABLE PROFILES:

Siding:

  • 1x4
  • 1x6
  • 1x8

Decking:

  • 2x6

Trim:

  • 5/4x4
  • 5/4x6
  • 5/4x8

Species: Southern Yellow Pine (Quartersawn)

Durability Class: Class 1 (25+ year lifespan)

Modification Process: KLAASWOOD Hydrolysis Modification Process

Finish Compatibility: Accepts paint, stain, and color finishes

Origin: Sourced, modified & made in the USA


APPLICATIONS:

  • Exterior siding for residential and commercial projects
  • Trim and fascia for architectural detailing
  • Premium decking for outdoor living spaces
  • Interior accent walls and ceilings
  • Specialty millwork and custom applications
Unique ref.
klaaswood-vertical-grain-siding
Product family
KLAASWOOD
Collection
Siding
Type
Object (single object)
Date of publishing
2026-06-03
Edition number
1
Main material
Thermally Modified Wood
Designed in
United States
Manufactured in
United States
BIMobject category
Walls - Cladding
CSI MasterFormat 2014 code
06 15 00
CSI MasterFormat 2014 title
Wood Decking