Wana Wazua.

I have heard a lot about construction using interlocking blocks and that they can cut costs upto 70%. Anyone used them. Are they really cheaper and durable? Do they give good finished product?want to build residential house in Ruai and a water tank. Was thinking of buying block making machine which i understand is like 100k. Any one ever used them machines?

@rocky. check here

http://www.a4architect.c...costs-savings-in-kenya/

and here
http://www.a4architect.c...-construction-in-kenya/

For Ruai, there are numerous quarries so stone would be better.