BuildEx Plywood

About the notebook

Pieter van Wyk keeps the notes behind BuildEx Plywood

Pieter has spent the last fourteen years on the board side of timber work: first in a Gauteng merchant yard cutting and grading sheets, then fitting shop units and kitchen carcasses across Pretoria and Centurion. He has watched enough 18 mm import boards cup in a coastal van conversion to be careful about what he recommends.

Most of what lands here comes from real jobs. Cutting plans for a 2440 x 1220 sheet, edge-sealing notes for Highveld winters, and honest comparisons between marine, structural and shuttering grades. Suppliers in Gauteng, KZN and the Western Cape get named by trade only, with no paid placement behind the mention.

If you have a delaminating sheet or a cut list that will not nest, send a photo or the drawing through. It may get worked through in the next post, with the numbers and the mistakes left in.

Notebook entries from the bench

Three posts currently on the bench. Each one started as a question from a builder, a shopfitter or someone halfway through a van fit-out who had already cut one sheet the wrong way. Filter by topic below, or scroll the full list.

All posts Grades and glue lines Cutting plans Moisture and sealing
Stacked plywood sheets showing edge grain and layered veneers

Grades and glue lines

Marine vs Structural Ply: Picking the Right Sheet for Wet Work

Where WBP glue actually earns its price, and where it is money down the drain

Marine ply and structural ply get sold as if they were interchangeable, but the glue line, veneer quality and void content tell a different story. This piece breaks down where a WBP-bonded sheet is worth the premium, where a standard interior board will do, and how shuttering ply fits into formwork that only needs to survive a few pours. It also covers what to look for on the edge of a sheet before you pay, and why a cheap import board can look fine in the yard and fail on site.

Read the post
Workshop bench with marked plywood sheet and cutting layout drawn in pencil

Cutting plans

Cutting Plans That Get More Out of a 2440 x 1220 Sheet

Nesting layouts for shelving, carcasses and van fit-outs

Most wasted plywood is lost at the drawing stage, not the saw. This post walks through a few real cutting plans for shelving runs, kitchen carcasses and van conversion panels, showing how grain direction, kerf width and edge-banding allowance change the layout. It also covers how to keep offcuts in standard sizes so they can be reused on the next job, and why a quick paper plan beats improvising at the bench.

Read the post
Close-up of plywood edge being sealed with a brush in a workshop

Moisture and sealing

Moisture, Sealing and Edge-Banding in Coastal and Highveld Conditions

Why the same board behaves differently in Durban and Johannesburg

Plywood reacts to where it lives. A sheet that stays flat in a dry Highveld winter can cup within a week on the KZN coast, and the difference usually shows up at the edges first. This post covers how to check moisture content before machining, which sealers hold up on exposed edges, and how edge-banding choices affect long-term stability. It also looks at storage practice in small workshops where space and airflow are limited.

Read the post

Worth reading next

Three posts that pick up where this one leaves off, from grade calls at the timber yard to layouts drawn on the back of a delivery note.

Filed under board selection and cutting plans

Grades

Marine vs Structural Ply: Picking the Right Sheet for Wet Work

Where WBP glue earns its price, where an interior board is fine, and how to read the edge of a sheet before you pay for it.

Read the grade comparison

Cutting plans

Cutting Plans That Get More Out of a 2440 x 1220 Sheet

Nesting layouts for shelving runs, kitchen carcasses and van panels, with kerf and edge-banding allowance worked in.

See the layouts

Moisture

Moisture, Sealing and Edge-Banding in Coastal and Highveld Conditions

Why the same sheet stays flat in a dry winter inland and cups within a week on the KZN coast, and what to do at the edges.

Read the sealing notes
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