Feedback from shopfitters, site carpenters and weekend woodworkers who used our grade notes to pick a board, plan a cut list or fix a delaminating edge. Names shortened at their request.
Shopfitting, Pretoria
We were about to order birch-faced for a reception counter, then read the note on edge-banding in dry winter air. Switched to a pine-faced structural sheet for the carcass and kept birch only for the visible panels. The counter has been in since March with no cupping at the joints.
Thabo M., cabinet shop
Van conversion, Durban
Coastal humidity wrecked my first attempt at a bed platform. The moisture content section explained why the board moved after a week in the garage. Second build used a WBP-bonded sheet, sealed all four edges before fitting, and it has stayed flat through two rainy seasons.
Riaan K., self-build
Formwork, Gauteng site
We sent in a photo of a shuttering sheet that had started to delaminate after the third pour. The reply walked through void checks and why that batch was never going to hold. Changed supplier for the next phase and the boards came off clean.
Sipho N., site foreman
Kitchen carcasses, Cape Town
The cutting plan for a 2440 x 1220 sheet saved us roughly a third of a board on a run of six base units. Grain direction was the part I had been getting wrong for years. Offcuts are now stored in standard sizes and get used on the next job.
Lerato D., kitchen fitter
Shelving, KZN Midlands
I had been speccing 18 mm for everything out of habit. The thickness notes for long shelf spans made me drop to 15 mm with a hardwood face strip and it has held a full run of books without sagging. Simpler and lighter to hang.
Megan P., home workshop
Decking sub-frame, Western Cape
The honest note on cheap import boards matched exactly what we saw on site: fine in the yard, swollen at the edges after one wet week. We now check the glue line and the edge before accepting a delivery. No sales talk, just what actually happens.
Andre V., decking contractor
Everything on this page comes from sheets we have handled, cut and watched fail or hold up. Where a claim depends on a supplier's own paperwork, we say so. Where we are repeating a trade rule of thumb, we say that too. Nothing here is a warranty on a board you buy elsewhere.
"Marine", "exterior" and "WBP" get used loosely by merchants. A sheet sold as marine ply in one yard may carry a different stamp in the next. Treat the label as a starting point and check the glue line and veneer on the edge before you commit a full sheet to a wet-area job.
An 18 mm sheet is rarely 18.00 mm, and sanding grades vary between batches. If a carcass, rebate or sliding fit depends on exact thickness, measure the stack you are buying from rather than trusting the invoice description.
Trade names appear in posts because that is how builders talk to each other in Gauteng, KZN and the Western Cape. No yard pays for a mention, and a name appearing here does not mean we have audited their stock, drying or storage.
If you send a delaminating sheet or a cut list, we work from what the photo shows. We cannot confirm how the board was stored, how long it sat in a damp garage, or what happened before the picture was taken. Our read on it is an opinion, not a diagnosis.
Cutting plans, sealing advice and moisture notes are written for small workshops and site work, not for engineered structural design. Anything load-bearing, fire-rated or specified by an architect needs an engineer's sign-off and the board's own certification. If a post here conflicts with a manufacturer's data sheet or a project spec, the data sheet and the spec win.