Product & Pricing

Full Stumbelbloc

400 x 200 x 200 mm


Half Stumbelbloc

200 x 200 x 200 mm


BlockGrip Adhesive

1 kg to lay up to 500 Stumbelblocs

US$55.00 (incl VAT)

Account Name: Stumbelbloc Zimbabwe
Bank: NMB Msasa Branch
Branch code: 11107
Account Number: 0000270151302

About Stumbelbloc

Stumbelbloc was first developed and produced in Cape Town, South Africa by Andre Esterhuizen. Andre had a very clear vision with regards to Stumbelbloc. He wanted to create an interlocking concrete building block which would enable millions of unskilled people in Africa to be able to build their own homes using a fast, affordable, cost effective, high quality and long lasting building system.

I am extremely happy to say that Andre not only managed to create such a product but managed to exceed everyone’s expectations with the creation of the STUMBELBLOC!

Stumbelbloc Zimbabwe was born in January 2014 after two years of Gardini Construction (Pvt) Ltd. working meticulously with Stumbelbloc South Africa in order to perfect both the product design mix, and the methods of production of the “blocs” for the Zimbabwean market. During these two years, Stumbelbloc Zimbabwe (Pvt) Ltd. also ensured that the product was certified and approved by the City of Harare as well as the Standards Association of Zimbabwe.


They interlock and are therefore just slotted into place. No time is wasted laying down mortar for each course of blocks and endlessly leveling blocks. Construction can be achieved in record time: eg. a 3m x 4m room can be built to roof height in 1 day (with 4 men)


The Stumbelblocs are made using extremely high grade concrete and come in at over double the strength required by the Standards Association of Zimbabwe. The Blockgrip mortar used in the Stumbelbloc build process has a bonding strength of 15 times greater than standard mortar.


When building with Stumbelbloc you will require only 1 bag of cement for every 500 Stumbelblocs. These 500 Stumbelblocs can be laid in one day by one brick layer plus one assitant. This therefore means that both your cement and labour bills will be dramatically reduced by up to 75%.


Laying each block in place takes seconds because they are uniform in shape and interlock with one another.

Much more accurate

Each block is exactly 400mm x 200mm x 200mm, and they interlock extremely precisely with the next block, either in line or at right angles.


Each full block has two large air-filled cavities which are natural thermal insulators, and also allow the warm air in the cavities to rise and exit the house.


Electical cable and plumbing is not chased into walls, but is led through the cavities in the blocks. No lintels required above doors/windows less than 1.5m wide.

No special skill required

People with little or no education or skill can lay the blocks. Only limited training is required.

BlockGrip Adhesive

BlockGrip is a white powder polymer which comes in 1kg tubs. Mix 1kg BlockGrip with 1 bag cement and 1 wheelbarrow sand to form a 'sloppy' mix. Dip each block about 3cm into the mix before laying in place on wall. This will bond the blocks together extremely strongly (see photos in gallery). 1kg BlockGrip will bond up to 500 blocks.