Ideally, yes. In order to maintain structural integrity, it is recommended that a suitable plaster is used. This not only provides a cost effective and waterproof layer to the blocks, but also penetrates the horizontal gaps between them. For thin bed mortar “Block Grip™” and “Skim Plaster™” please visit www.technicalfinishes.com
Made to the recommended concrete mix at 4,8 MPa Stumbelbloc blocks conform to SABS requirements of more than 3,5 MPa. When built with SABS and NHBRC approved thin bed mortar, they can legally be used to build with in RSA. Stumbelbloc does have Agreement and NHBRC approval.
Anything that is ordinarily built with traditional blocks can be built with Stumbelbloc, but with Stumbelbloc it is cheaper, faster and easier.
Obviously, this will depend on the type and size of structure and, the local material and labour costs.
This depends on how much time you have and the size of the house. A small dwelling of 58 m² needs 1 500 blocks. 60 moulds will keep 1 labourer busy daily and will produce the required number of blocks in 50 days. 2 labourers will mean 25 days etc. And so on prorate.
Stumbelbloc has been approved in South Africa for single storey dwellings only. Refer to your countries building regulations and requirements of MPa strength for different levels
This is determined by the block strength. 4, 8 MPa can build up to 5, 3 m load bearing walls. Maximum wall plate height is 3, 5 m and maximum gable height 5, 3 m
These are all simply fitted into the hollow cavities which are completely clean by virtue of the bonding process.
Because the block is wet cast, it is far more dense and compact than dry pressed block and is therefore superior in thermal and strength quality. The construction method using the bed mortar leaves the block cavities completely clean. Traditional blocks need standard mortar which tends to block the cavities. Of course, the cavities themselves may be filled with any form of insulation material.
Apart from being able to use people who have never constructed a dwelling before, the speed of the process allows very productive and profitable results. From a social perspective, Stumbelbloc allow unskilled workers – even if they are unable to read or write – to both make and build with the blocks without any energy or power source. Some simple tuition is all that’s required. Blocks can be made in remote areas (Including disaster zones) providing that local sand and cement is available. The resulting structures providing permanent and very robust accommodation.