Technical drawing or diagram with measurements and dimensions

P51 TMT Vertical Shiplap 135x20mm

Species Thermally Modified Pine Thermally Modified Kwila Thermally Modified Oak

Finish Uncoated Pre-primed x1 Coat (Dulux Ultra Prime)

Face Dress Face BandSaw Face

$14.24 $14.24/m

Taxes included. Shipping calculated at checkout.

Request delivery quote

Request something custom made

Our P51 TMT Vertical Shiplap 135x20mm profile is a premium architectural timber cladding option designed to deliver a strong vertical look with crisp shadow lines. The P51 profile is a highly sought-after bevel grooved vertical shiplap profile, giving exterior walls a refined linear appearance while adding depth and texture through its negative detail.

The vertical shiplap style is especially popular for contemporary New Zealand homes because it helps create height, shadow, and a sleek exterior appearance. This product is the ideal solution for customers wanting a modern timber weatherboard look without overcomplicating the design. Use it for exterior cladding, architectural wall features, gables, garage fronts, entryways, outdoor rooms, and selected interior feature applications where a strong vertical timber finish is required.

Key Benefits of P51 Vertical Shiplap Cladding

Modern architectural look with clean vertical shiplap lines
P51 TMT bevel grooved profile for a bold shadow-line finish
111mm effective cover for easier cladding quantity calculations
135x20mm board size with a strong, solid timber appearance
Great for contemporary NZ homes, renovations, extensions, and feature walls
Vertical layout helps add height and visual impact to exterior facades
Suitable for staining, oiling, or coating, depending on species and project requirements

Available Length Spread Specs

TMT Pine	3.1m	3.4m	3.7m	4.0m	4.3m	4.9m
TMT Kwila	2.7m	3.0m	3.6m	4.2m	4.8m
TMT Oak			2.7m	3.0m	3.3m	3.6m

Please Note: To order select lengths, please contact us as there is an additional 30% fee on select length orders. All other orders that are not select length will be supplied in a range of the following lengths above.

Technical Specifications

Specification	Detail
Product Name	P51 TMT Vertical Shiplap 135x20mm
Profile	P51 TMT Vertical Shiplap
Board Size	135mm x 20mm
Approx. Effective Cover	111mm
Coverage Per Lineal Metre	Approx. 0.111m²
Lineal Metres Per m²	Approx. 8.7 lineal metres per m²
Profile Style	Bevel grooved vertical shiplap
Detail	Bevelled negative detail / shadow-line profile
Species	Thermally Modified Pine, Kwila & Red Oak
Application	Exterior cladding, architectural facades, feature walls, gables, renovations
Finish	Supplied as Dress face or Bandsaw Face
Fixing / Installation	Install to relevant supplier specifications, NZ Building Code (E2/AS1) requirements, and project documentation
Recommended Waste Allowance	Add 10–15% for cutting, joins, corners, and site wastage
Availability	Subject to availability with lead times up to 6 - 8 weeks.

Additional Terms

Product Variability
Solid Timber Cladding is a natural timber product and may vary in colour, grain, and texture. All specifications are approximate.

Pre-Ordering, Availability & Leadtime\"s
Product availability and lead times are subject to stock levels and Supplier scheduling. Please confirm order details with a Lumberdeal representative before preordering.

Architectural Specification & Pro-Tips

Installation Pro-Tips for Builders

Fixings: For optimal durability and to prevent staining, we strongly recommend using 316 Stainless Steel annular grooved nails or cladding screws. This is especially critical in coastal areas (Exposure Zone D) as per NZS 3604:2011.
Pre-Coating: To ensure maximum lifespan and dimensional stability, seal all lap joints and cut ends with a high-quality exterior timber oil before installation.
Moisture Management: Ensure framing moisture content is below 20% and cladding is between 14-18% at the time of installation, in accordance with NZS 3602:2003.