News / efflock to prevent efflorescence
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Mar 06, 2013
Frustration of rain on tile screed with exposed balconies.
Read more →By using Efflock, a secondary membrane to control efflorescence is not required. There are however, builders, architects and engineers who insist on including a secondary membrane as they like to 'cover all bases'. I can understand that; as builder myself, I like to include a few insurances in my work to avoid getting that phone call nobody wants. A secondary membrane remains good building practice, so long as excessive moisture is not sandwiched and trapped in between layers in the process. I've also had situations myself in remedial work, where we opted to screed first, then apply a membrane and...
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Mar 01, 2013
Efflock to prevent rising damp and salt attack in buildings
Read more →Photograph showing rising damp and subsequent salt attack below DPC level. Rising damp is destructive for buildings. It is well understood that damp very quickly will create rot in structural timbers such as bearers and joists, and therefore a DPC (damp proof course) is provided to prevent rising damp. A modern DPC is typically a black embossed polythene roll that is laid out directly beneath ant-capping, or just below finished ground floor level. Polyethelene underlay (black or orange plastic) serves the same purpose for slab on ground construction. What is not usually considered, is that rising damp can also have destructive consequences...
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Oct 27, 2012
Efflock test with salt water samples
Read more →We've put Efflock to the test with exactly what you should not do to concrete! Pictured are two samples of 4 sand: 1 cement each made with 140mls of straight sea water from Coogee Bay off the coast of Sydney. They have been cured and placed in a dish of water to test their water repellency. In the foreground is the Efflock sample. Even with salt water in the concrete mix there is clearly no wicking effect! Without water able to dissolve salts and free lime, efflorescence cannot occur.