Certified in Zimbabwe

Build itblock by block.

Stumbelbloc is a revolutionary interlocking concrete block that makes building faster, stronger, cheaper and easier — no special skill required.

Explore the product How to build

75%: Lower cement & labour cost
1 day: A room to roof height
2x: Above required strength

The block

Moulded on a labour-intensive line — creating jobs and skills locally.

Why Stumbelbloc

Four reasons it beats the brick

A single, precise block that changes the economics of building in Zimbabwe.

Faster

Blocks interlock and slot into place — no mortar beds, no endless levelling.

A 3m x 4m room can be built to roof height in a single day with just four people.

Stronger

Over double the strength required by the Standards Association of Zimbabwe.

The BlockGrip mortar bonds 15 times stronger than standard mortar.

Cheaper

One bag of cement lays 500 blocks, cutting cement and labour bills by up to 75%.

500 blocks can be laid in one day by a single bricklayer and one assistant.

Easier

Uniform, interlocking blocks that anyone can lay with only limited training.

Each block is exactly 400 x 200 x 200 mm and interlocks precisely, in line or at right angles.

Stumbelbloc interlocking blocks stacked together

400×200×200

Millimetres, every time

Engineered to build

More than just fast

Every detail of the block is designed for real building conditions — from thermal comfort to running services through the walls.

Cooler homes
Two large air-filled cavities act as natural thermal insulators, letting warm air rise and exit the house.
Pinpoint accurate
Every block is identical and interlocks precisely with the next, in line or at right angles.
Practical services
Electrical cable and plumbing run through the block cavities — no chasing walls, no lintels under 1.5m openings.
No special skill
People with little or no building experience can lay the blocks after only limited training.

A Stumbelbloc wall carrying the Standards Association of Zimbabwe approval mark

Approved to Zimbabwe Standard

Certified strength you can trust

Stumbelbloc is certified by the Standards Association of Zimbabwe and comes in at over double the required strength. It is recommended by a number of institutions across the country.

Read about certification

Built with Stumbelbloc