Materials Guide · Lati Bazar Since 1980
Blockboard Thickness Guide
Which thickness to use for shelves, wardrobes, doors and partitions — a quick reference so you don't over- or under-buy. Explained by Ahmedabad's plywood dealer since 1980.
Matching Thickness to the Job
Blockboard is sold across a wide thickness range, and picking correctly matters as much here as it does for plywood — under-thickness on a load-bearing part flexes and eventually fails, while over-thickness on a light panel just adds unnecessary cost and weight. This page is a quick reference; see our broader blockboard properties guide for the full technical picture.
Which Thickness for Which Application
A quick reference across the most common blockboard uses.
Lightweight Decorative Panels
The thinnest standard blockboard, suited to non-structural decorative panels rather than anything load-bearing.
Shelving
12mm blockboard handles light to moderate shelf loads, and its solid core lets a shelf span over 6 feet without bending — see our blockboard for shelves guide.
Wardrobe Shutters & Panels
The standard range for wardrobe doors and general furniture panels — see our blockboard for wardrobe guide for the full picture.
Doors & Partitions
The thickest standard option, used where the panel carries more structural load, such as a door shutter or partition wall panel.
Why Thicker Isn't Always Better
It's tempting to default to the thickest available blockboard "to be safe," but this wastes money on parts that don't need it and adds unnecessary weight — a real concern for wardrobe shutters, where extra weight strains hinges over time. Match the thickness to the actual load and span of each specific panel, the same principle covered in our how to choose plywood for interiors framework, which applies equally well to blockboard selection.
Frequently Asked Questions
What thickness of blockboard should be used for a wardrobe?
16mm to 19mm blockboard is standard for wardrobe shutters and panels, giving enough rigidity for tall doors while remaining lighter than an equivalent plywood panel.
What thickness of blockboard is used for doors and partitions?
25mm blockboard is the standard for doors and partition panels, since these carry more structural load and need the extra rigidity of the thicker sheet.
Can thin blockboard be used for shelving?
12mm blockboard works for light to moderate shelving loads, and blockboard's solid core allows shelves to span over 6 feet without bending or warping — a notable advantage over plywood or MDF at the same thickness for a wide, unsupported shelf.
What is the thinnest blockboard available?
6mm is generally the thinnest standard blockboard thickness, suited to lightweight decorative panels rather than structural applications.
Does thicker blockboard always mean better quality?
No — thickness should match the application's load, not be maximised regardless of need. Using 25mm blockboard for a lightweight decorative panel wastes money without adding any real benefit, while using 12mm for a heavy door risks flexing and premature wear.
Not Sure Which Thickness You Need?
WhatsApp us your application and we'll recommend the right blockboard thickness.