NewTechWood Shadowline composite siding on a modern home facade

Shadowline Composite Siding

4-Sided
UltraShield capping
95%
Recycled materials
Zero
Staining or sealing
UH68 - Shadowline

UH68 - Shadowline

UH68 - Shadowline specifications
Width 6-11/16" (170 mm)
Depth 1" (25 mm)
Length 16' & 8'
Weight 1.41 lb/ft

Profiles

Shadowline Siding is named for what it does at the joint — a deliberately recessed reveal that catches a thin, controlled band of shadow between cladding boards, giving the wall a measured architectural rhythm at every scale of viewing. Up close, the joint reads as crisp detail work; from a hundred feet, it reads as a single continuous surface broken by quiet horizontal lines. Built on the same UltraShield® capped composite rain-screen platform as our All Weather, European, and Noir siding lines — hidden clips, air-flow behind the panel, 25-year warranty, four UltraShield colors — Shadowline Siding pairs the visual sophistication of European architectural cladding with the no-maintenance performance of premium composite. Specified for restaurants, boutique hotels, retail facades, and custom homes where every elevation is a design decision and the joint detail can’t be sloppy.

Colors

Our UltraShield® color range spans natural wood tones and contemporary grays, each finished with the same fade- and stain-resistant cap. Colors shown are representative — order a physical sample to confirm the exact tone and grain before you buy.

Trims & Accessories

Purpose-made trims close every edge, corner and opening of a Shadowline installation without interrupting the recessed joint the profile is named for.

Composite Trims

  • End-Trim UH50

    End-Trim UH50

    End-Trim UH50 specifications
    Size 3″ × 2-1/8″ (75.5 × 54 mm)
    Length 8′
    Weight 0.91 lb/ft
    View product
  • Outside Corner Trim UH51

    Outside Corner Trim UH51

    Outside Corner Trim UH51 specifications
    Size 3-3/16″ × 3-3/16″ (81.5 × 81.5 mm)
    Length 8′
    Weight 1.01 lb/ft
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  • L-Trim US20

    L-Trim US20

    L-Trim US20 specifications
    Size 1-9/16″ × 1-9/16″ (40 × 40 mm)
    Length 8′
    Weight 0.48 lb/ft
    View product
  • I-Trim UH70

    I-Trim UH70

    I-Trim UH70 specifications
    Size 4″ × 1-3/8″ (100 × 35 mm)
    Length 8′
    Weight 0.73 lb/ft
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  • F-Trim US73

    F-Trim US73

    F-Trim US73 specifications
    Size 3″ × 2-15/16″ (74 × 58 mm)
    Length 8′
    Weight 0.8 lb/ft
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Aluminum Trims

  • H-Trim CA162-AA60

    H-Trim CA162-AA60

    H-Trim CA162-AA60 specifications
    Size 1-1/2″ × 2-3/16″ (38.1 × 55.6 mm)
    Weight 0.55 lb/ft
  • F-Trim CA156-AA154

    F-Trim CA156-AA154

    F-Trim CA156-AA154 specifications
    Size 2″ × 2-5/16″ (50.8 × 58.7 mm)
    Weight 0.8 lb/ft
  • Inside Corner Trim CA50-AA61

    Inside Corner Trim CA50-AA61

    Inside Corner Trim CA50-AA61 specifications
    Size 3-1/4″ × 3-3/16″ (82.6 × 81 mm)
    Weight 1.16 lb/ft
  • Outside Corner Trim CA161-AA160

    Outside Corner Trim CA161-AA160

    Outside Corner Trim CA161-AA160 specifications
    Size 2-7/8″ × 3-9/16″ (73 × 90.5 mm)
    Weight 1.08 lb/ft
  • Flashing CA41

    Flashing CA41

    Flashing CA41 specifications
    Size 3-3/16″ × 3-3/16″ (81 × 81 mm)
    Weight 0.58 lb/ft
    Window head, window sill and butt-joint flashing.
  • Perforated Starting Trim CA43

    Perforated Starting Trim CA43

    Perforated Starting Trim CA43 specifications
    Size 1-1/2″ × 1-5/8″ (38.1 × 41.3 mm)
    Weight 0.37 lb/ft

Hardware

  • Siding Clips AW08

    Siding Clips AW08

    Siding Clips AW08 specifications
    Material Aluminum
    Size 1-1/8″ × 9/16″ × 13/16″ (28 × 14.5 × 20 mm)
    Weight 1.06 lb/bag
    Fixed to the joists — carries the connection between each board.
    View product
  • Starter Strip AW02

    Starter Strip AW02

    Starter Strip AW02 specifications
    Material Aluminum
    Size 11/16″ × 9/16″ (15 × 14.5 mm)
    Weight 0.32 lb/piece
    Sets the first cladding board on the joist.
    View product
  • Rubber Stopper T-7

    Rubber Stopper T-7

    Rubber Stopper T-7 specifications
    Material Rubber
    Size ø11/16″ × H 5/16″ (ø18 × H8 mm)
    Weight 0.25 lb/bag
    Supports the board on the joist when fitting the last course.
    View product

Downloads

Product literature, installation guides and technical documents for Shadowline Siding.

Catalog

Installation Guide

  • Alusions Siding Trims Installation Guide
  • Shadowline Siding Vertical Installation Guide
  • Shadowline Siding Horizontal Installation Guide

Certificate

  • NewTechWood European Models UH58 UH118 UH119 and UH68 Miami-Dade Notice of Acceptance
  • NEWTECHWOOD UH58 & UH68 SIDING MIAMI-DADE COUNTY NOTICE OF ACCEPTANCE

Warranty

Other Documents

The UltraShield® Difference

Engineered to outlast the elements.

Every NewTechWood board pairs a dense polyethylene-and-wood-fiber core with a 360° polymer cap, tested against stains, scratches, fade, and boiling water. The result: composite that looks like wood, behaves like a fortress, and stays beautiful for decades.

Read the UltraShield® advantage